R/gas_volume_to_mass.R
In skgrange/threadr: Tools to Thread Pieces Of Data Analysis Together
Defines functions
ppb_to_ppt
ppt_to_ppb
ppm_to_ppb
ppb_to_ppm
microgram_to_milligram
milligram_to_microgram
molecular_mass_table
clean_gas_string
find_molecular_mass_from_string
calculate_molecular_volume
gas_mass_to_volume
gas_volume_to_mass
Documented in
gas_mass_to_volume
gas_volume_to_mass
microgram_to_milligram
milligram_to_microgram
molecular_mass_table
ppb_to_ppm
ppb_to_ppt
ppm_to_ppb
ppt_to_ppb
#' Functions to convert gas concentrations between volume- and mass-units.
#'
#' Use \code{gas_volume_to_mass} when a gas concentration is in ppb or ppm and
#' ug m-3 or mg m-3 is desired. Use \code{gas_mass_to_volume} when a gas
#' concentration is in ug m-3 or mg m-3 and ppb or ppm is desired.
#'
#' These functions allow for input of temperatures and pressures which change
#' the coefficients used for the conversion between the unit systems, they do
#' not use conversion factors.
#'
#' @param volume Gas concentration in ppb or ppm.
#'
#' @param mass Gas concentration in ug m-3 or mg m-3.
#'
#' @param gas A string such as \code{"o3"}, \code{"co"}, or \code{"co2"} which
#' represents the input gas. This is used to find the molecular mass of a gas.
#' Every gas-species will never be supported, therefore, use the
#' \code{molecular_mass} argument if your gas is not implemented.
#'
#' @param molecular_mass Molecular mass of gas in g mol-1. For example, for
#' ozone, this is 48 and for carbon monoxide this is 28.01.
#'
#' @param unit_input,unit_output Input and output units.
#'
#' @param temp Default is 0 degrees Celsius. However, values such as 20 or 25
#' degrees Celsius are often used.
#'
#' @param pressure Default is 101325 Pa (1 standard atmosphere).
#'
#' @param x Vector of gases to convert.
#'
#' @author Stuart K. Grange
#'
#' @return Numeric vector.
#'
#' @seealso \code{\link{molecular_mass_table}}
#'
#' @examples
#'
#' # Ozone
#' # From ppb
#' gas_volume_to_mass(400, "o3")
#'
#' # To ug m-3
#' gas_mass_to_volume(800, "o3")
#'
#' # For monitoring sites in Europe where conversions are done at 20 degrees
#' gas_mass_to_volume(2.24, "no", temp = 20, unit_output = "ppb")
#' gas_mass_to_volume(24.53, "no2", temp = 20, unit_output = "ppb")
#' gas_mass_to_volume(37.74, "o3", temp = 20, unit_output = "ppb")
#'
#' # CO usually uses different units
#' gas_mass_to_volume(
#' mass = 0.39,
#' gas = "co",
#' unit_input = "mg_m3",
#' temp = 20,
#' unit_output = "ppb"
#' )
#'
#' # NOx as NO2
#' gas_volume_to_mass(14.64, "no2", temp = 20, unit_input = "ppb")
#'
#' @export
gas_volume_to_mass <- function(volume, gas, molecular_mass = NA,
unit_input = "ppb", unit_output = "ug_m3",
temp = 0, pressure = 101325) {
# Check inputs
unit_input <- stringr::str_to_lower(unit_input)
if (!unit_input %in% c("ppb", "ppm")) {
stop("Input unit must be `ppb` or `ppm`.", call. = FALSE)
}
# Transform input units
# To ppm to ppb
if (unit_input == "ppm") volume <- ppm_to_ppb(volume)
# Get molecular mass
molecular_mass <- find_molecular_mass_from_string(molecular_mass, gas)
# Get coefficient
molecular_volume <- calculate_molecular_volume(temp, pressure)
# The conversion
mass <- volume * molecular_mass / molecular_volume
# Transform output units, ug_m3 to mg_m3
if (unit_output == "mg_m3") mass <- microgram_to_milligram(mass)
return(mass)
}
#' @rdname gas_volume_to_mass
#' @export
gas_mass_to_volume <- function(mass, gas, molecular_mass = NA,
unit_input = "ug_m3", unit_output = "ppb",
temp = 0, pressure = 101325) {
# Check inputs
unit_input <- stringr::str_to_lower(unit_input)
if (!unit_input %in% c("ug_m3", "mg_m3")) {
stop("Input unit must be `ug_m3` `or mg_m3`.", call. = FALSE)
}
# Transform input units
# ug_m3 to mg_m3
if (unit_input == "mg_m3") mass <- milligram_to_microgram(mass)
# Get molecular mass
molecular_mass <- find_molecular_mass_from_string(molecular_mass, gas)
# Get coefficient
molecular_volume <- calculate_molecular_volume(temp, pressure)
# The conversion
volume <- mass / (molecular_mass / molecular_volume)
# Transform output units
# To ppm to ppb
if (unit_output == "ppm") volume <- ppb_to_ppm(volume)
return(volume)
}
# No export
calculate_molecular_volume <- function(temp, pressure) {
22.41 * (273.15 + temp) / 273.15 * 101325 / pressure
}
find_molecular_mass_from_string <- function(molecular_mass, gas) {
if (is.na(molecular_mass)) {
# Find molecular mass by using a look-up table
molecular_mass <- molecular_mass_table(unique_names = TRUE) %>%
filter(name == !!clean_gas_string(gas)) %>%
pull(molecular_mass)
# Check for no match
if (length(molecular_mass) == 0) {
stop("`gas` not supported, use the `molecular_mass` argument.", call. = FALSE)
}
# Check for multiple matches
if (length(molecular_mass) >= 2) {
stop("Multiple `gas` matches returned, check look-up table.", call. = FALSE)
}
} else {
# or use argument
molecular_mass <- molecular_mass
}
return(molecular_mass)
}
clean_gas_string <- function(x) {
# Check
if (length(x) != 1) {
stop("Only one `gas` can be supplied.", call. = FALSE)
}
# Parse to ensure formatting is fixed
x <- x %>%
stringr::str_to_lower() %>%
stringr::str_trim()
return(x)
}
#' Functions to return a table containing molecular masses for use in
#' \code{\link{gas_volume_to_mass}} and \code{\link{gas_mass_to_volume}}.
#'
#' @param unique_names Should only unique names be returned?
#'
#' @author Stuart K. Grange and Shona Wilde.
#'
#' @return Tibble.
#'
#' @seealso \code{\link{gas_volume_to_mass}}, \code{\link{gas_mass_to_volume}}
#'
#' @examples
#'
#' # Load and print entire table
#' molecular_mass_table() %>%
#' print(n = Inf)
#'
#' @export
molecular_mass_table <- function(unique_names = TRUE) {
df <- tibble::tribble(
~name, ~name_common, ~group, ~molecular_mass, ~unique_name, ~notes,
"o3", NA_character_, NA_character_, 48, NA_integer_, NA_character_,
"co", NA_character_, NA_character_, 28.01, NA_integer_, NA_character_,
"no", NA_character_, NA_character_, 30.01, NA_integer_, NA_character_,
"no2", NA_character_, NA_character_, 46.0055, NA_integer_, NA_character_,
"nox", NA_character_, NA_character_, 46.0055, NA_integer_, "Use 100 % no2 & may need altering for different fractions at some point",
"co2", NA_character_, NA_character_, 44.01, NA_integer_, NA_character_,
"so2", NA_character_, NA_character_, 64.066, NA_integer_, NA_character_,
"h2s", NA_character_, NA_character_, 34.08, NA_integer_, NA_character_,
"ch4", "methane", NA_character_, 16.01, NA_integer_, NA_character_,
"methane", "methane", NA_character_, 16.01, NA_integer_, NA_character_,
"o2", "oxygen", NA_character_, 31.9988, NA_integer_, "O or O2? & using O2 here",
"nh3", "ammonia", NA_character_, 17.031, NA_integer_, NA_character_,
"ethane", "ethane", "vocs", 30.07, NA_integer_, NA_character_,
"c2h6", "ethane", "vocs", 30.07, NA_integer_, NA_character_,
"ethene", "ethene", "vocs", 28.05, NA_integer_, NA_character_,
"c2h4", "ethene", "vocs", 28.05, NA_integer_, NA_character_,
"acetylene", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"ethyne", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"c2h2", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"propane", "propane", "vocs", 44.1, NA_integer_, NA_character_,
"c3h8", "propane", "vocs", 44.1, NA_integer_, NA_character_,
"propene", "propene", "vocs", 42.08, NA_integer_, NA_character_,
"c3h6", "propene", "vocs", 42.08, NA_integer_, NA_character_,
"iso-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"i-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"2-methylpropane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"n-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"c4h10", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"trans-2-butene", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"2-butene", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"c4h8", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"cis-2-butene", "2-butene", "vocs", 56.1, NA_integer_, NA_character_,
"2-butene", "2-butene", "vocs", 56.1, 0, "different isomers & users need to use the specific name",
"c4h8", "2-butene", "vocs", 56.1, 0, "different isomers & users need to use the specific name",
"but-1-ene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"1-butene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"butene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"iso-pentane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"i-pentane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"2-methylbutane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"n-pentane", "n-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"c5h12", "n-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"1,3-butadiene", "1,3-butadiene", "vocs", 54.0916, NA_integer_, NA_character_,
"butadiene", "1,3-butadiene", "vocs", 54.0916, NA_integer_, NA_character_,
"trans-2-pentene", "2-pentene", "vocs", 70.13, NA_integer_, NA_character_,
"2-pentene", "2-pentene", "vocs", 70.13, NA_integer_, NA_character_,
"pent-1-ene", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"pentene", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"c5h10", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"2,3-methyl pentanes", "2,3-methyl pentanes", "vocs", 86.1754, NA_integer_, NA_character_,
"2,3-dimethylbutane", "2,3-methyl pentanes", "vocs", 86.1754, NA_integer_, NA_character_,
"hexane", "hexane", "vocs", 86.18, NA_integer_, NA_character_,
"c6h14", "hexane", "vocs", 86.18, NA_integer_, NA_character_,
"isoprene", "isoprene", "vocs", 68.12, NA_integer_, NA_character_,
"c5h8", "isoprene", "vocs", 68.12, NA_integer_, NA_character_,
"heptane", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"n-heptane", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"c7h16", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"benzene", "benzene", "vocs", 78.11, NA_integer_, NA_character_,
"c6h6", "benzene", "vocs", 78.11, NA_integer_, NA_character_,
"224-TMP", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"2,2,4-tmp", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"iso-octane", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"2,2,4-trimethylpentane", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"octane", "octane", "vocs", 114.23, NA_integer_, NA_character_,
"n-octane", "octane", "vocs", 114.23, NA_integer_, NA_character_,
"toluene", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"methylbenzene", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"c7h8", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"h2o", "water", NA_character_, 18.01528, NA_integer_, NA_character_
)
if (unique_names) df <- filter(df, unique_name != 0L | is.na(unique_name))
return(df)
}
#' @rdname gas_volume_to_mass
#'
#' @export
milligram_to_microgram <- function(x) x * 1000
#' @rdname gas_volume_to_mass
#'
#' @export
microgram_to_milligram <- function(x) x / milligram_to_microgram(1)
#' @rdname gas_volume_to_mass
#'
#' @export
ppb_to_ppm <- function(x) x / 1000
#' @rdname gas_volume_to_mass
#'
#' @export
ppm_to_ppb <- function(x) x / ppb_to_ppm(1)
#' @rdname gas_volume_to_mass
#'
#' @export
ppt_to_ppb <- function(x) x / 1000
#' @rdname gas_volume_to_mass
#'
#' @export
ppb_to_ppt <- function(x) x / ppt_to_ppb(1)
#' convert_water_percent_to_mass <- function(percent, molecular_mass = 18.01528,
#' temp = 0, pressure = 101325) {
#'
#' # Convert concentration to ppm
#' concentration <- percent * 10000
#'
#' # Do the conversion to mass in ug.m-3
#' concentration_mass <- gas_volume_to_mass(
#' concentration,
#' molecular_mass = molecular_mass,
#' temp = temp,
#' pressure = pressure,
#' unit_output = "ug_m3"
#' )
#'
#' # To g.m-3, the units usually used for absolute humidity
#' concentration_mass <- concentration_mass / 1000
#'
#' return(concentration_mass)
#'
#' }
#' convert_absolute_humidity_to_percent <- function(humidity,
#' molecular_mass = 18.01528,
#' temp = 0, pressure = 101325) {
#'
#' # Convert input unit (assumed to be g.kg-1) to ug.m-3
#' humidity <- humidity / 1000
#'
#' # Convert from mass to volume and return in ppb units
#' concentration <- gas_mass_to_volume(
#' humidity,
#' molecular_mass = molecular_mass,
#' temp = temp,
#' pressure = pressure,
#' unit_output = "ppb"
#' )
#'
#' # Transform ppb to percent
#' concentration <- concentration * 100
#'
#' return(concentration)
#'
#' }
skgrange/threadr documentation built on May 11, 2024, 12:16 p.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Defines functions ppb_to_ppt ppt_to_ppb ppm_to_ppb ppb_to_ppm microgram_to_milligram milligram_to_microgram molecular_mass_table clean_gas_string find_molecular_mass_from_string calculate_molecular_volume gas_mass_to_volume gas_volume_to_mass
Documented in gas_mass_to_volume gas_volume_to_mass microgram_to_milligram milligram_to_microgram molecular_mass_table ppb_to_ppm ppb_to_ppt ppm_to_ppb ppt_to_ppb
#' Functions to convert gas concentrations between volume- and mass-units.
#'
#' Use \code{gas_volume_to_mass} when a gas concentration is in ppb or ppm and
#' ug m-3 or mg m-3 is desired. Use \code{gas_mass_to_volume} when a gas
#' concentration is in ug m-3 or mg m-3 and ppb or ppm is desired.
#'
#' These functions allow for input of temperatures and pressures which change
#' the coefficients used for the conversion between the unit systems, they do
#' not use conversion factors.
#'
#' @param volume Gas concentration in ppb or ppm.
#'
#' @param mass Gas concentration in ug m-3 or mg m-3.
#'
#' @param gas A string such as \code{"o3"}, \code{"co"}, or \code{"co2"} which
#' represents the input gas. This is used to find the molecular mass of a gas.
#' Every gas-species will never be supported, therefore, use the
#' \code{molecular_mass} argument if your gas is not implemented.
#'
#' @param molecular_mass Molecular mass of gas in g mol-1. For example, for
#' ozone, this is 48 and for carbon monoxide this is 28.01.
#'
#' @param unit_input,unit_output Input and output units.
#'
#' @param temp Default is 0 degrees Celsius. However, values such as 20 or 25
#' degrees Celsius are often used.
#'
#' @param pressure Default is 101325 Pa (1 standard atmosphere).
#'
#' @param x Vector of gases to convert.
#'
#' @author Stuart K. Grange
#'
#' @return Numeric vector.
#'
#' @seealso \code{\link{molecular_mass_table}}
#'
#' @examples
#'
#' # Ozone
#' # From ppb
#' gas_volume_to_mass(400, "o3")
#'
#' # To ug m-3
#' gas_mass_to_volume(800, "o3")
#'
#' # For monitoring sites in Europe where conversions are done at 20 degrees
#' gas_mass_to_volume(2.24, "no", temp = 20, unit_output = "ppb")
#' gas_mass_to_volume(24.53, "no2", temp = 20, unit_output = "ppb")
#' gas_mass_to_volume(37.74, "o3", temp = 20, unit_output = "ppb")
#'
#' # CO usually uses different units
#' gas_mass_to_volume(
#' mass = 0.39,
#' gas = "co",
#' unit_input = "mg_m3",
#' temp = 20,
#' unit_output = "ppb"
#' )
#'
#' # NOx as NO2
#' gas_volume_to_mass(14.64, "no2", temp = 20, unit_input = "ppb")
#'
#' @export
gas_volume_to_mass <- function(volume, gas, molecular_mass = NA,
unit_input = "ppb", unit_output = "ug_m3",
temp = 0, pressure = 101325) {
# Check inputs
unit_input <- stringr::str_to_lower(unit_input)
if (!unit_input %in% c("ppb", "ppm")) {
stop("Input unit must be `ppb` or `ppm`.", call. = FALSE)
}
# Transform input units
# To ppm to ppb
if (unit_input == "ppm") volume <- ppm_to_ppb(volume)
# Get molecular mass
molecular_mass <- find_molecular_mass_from_string(molecular_mass, gas)
# Get coefficient
molecular_volume <- calculate_molecular_volume(temp, pressure)
# The conversion
mass <- volume * molecular_mass / molecular_volume
# Transform output units, ug_m3 to mg_m3
if (unit_output == "mg_m3") mass <- microgram_to_milligram(mass)
return(mass)
}
#' @rdname gas_volume_to_mass
#' @export
gas_mass_to_volume <- function(mass, gas, molecular_mass = NA,
unit_input = "ug_m3", unit_output = "ppb",
temp = 0, pressure = 101325) {
# Check inputs
unit_input <- stringr::str_to_lower(unit_input)
if (!unit_input %in% c("ug_m3", "mg_m3")) {
stop("Input unit must be `ug_m3` `or mg_m3`.", call. = FALSE)
}
# Transform input units
# ug_m3 to mg_m3
if (unit_input == "mg_m3") mass <- milligram_to_microgram(mass)
# Get molecular mass
molecular_mass <- find_molecular_mass_from_string(molecular_mass, gas)
# Get coefficient
molecular_volume <- calculate_molecular_volume(temp, pressure)
# The conversion
volume <- mass / (molecular_mass / molecular_volume)
# Transform output units
# To ppm to ppb
if (unit_output == "ppm") volume <- ppb_to_ppm(volume)
return(volume)
}
# No export
calculate_molecular_volume <- function(temp, pressure) {
22.41 * (273.15 + temp) / 273.15 * 101325 / pressure
}
find_molecular_mass_from_string <- function(molecular_mass, gas) {
if (is.na(molecular_mass)) {
# Find molecular mass by using a look-up table
molecular_mass <- molecular_mass_table(unique_names = TRUE) %>%
filter(name == !!clean_gas_string(gas)) %>%
pull(molecular_mass)
# Check for no match
if (length(molecular_mass) == 0) {
stop("`gas` not supported, use the `molecular_mass` argument.", call. = FALSE)
}
# Check for multiple matches
if (length(molecular_mass) >= 2) {
stop("Multiple `gas` matches returned, check look-up table.", call. = FALSE)
}
} else {
# or use argument
molecular_mass <- molecular_mass
}
return(molecular_mass)
}
clean_gas_string <- function(x) {
# Check
if (length(x) != 1) {
stop("Only one `gas` can be supplied.", call. = FALSE)
}
# Parse to ensure formatting is fixed
x <- x %>%
stringr::str_to_lower() %>%
stringr::str_trim()
return(x)
}
#' Functions to return a table containing molecular masses for use in
#' \code{\link{gas_volume_to_mass}} and \code{\link{gas_mass_to_volume}}.
#'
#' @param unique_names Should only unique names be returned?
#'
#' @author Stuart K. Grange and Shona Wilde.
#'
#' @return Tibble.
#'
#' @seealso \code{\link{gas_volume_to_mass}}, \code{\link{gas_mass_to_volume}}
#'
#' @examples
#'
#' # Load and print entire table
#' molecular_mass_table() %>%
#' print(n = Inf)
#'
#' @export
molecular_mass_table <- function(unique_names = TRUE) {
df <- tibble::tribble(
~name, ~name_common, ~group, ~molecular_mass, ~unique_name, ~notes,
"o3", NA_character_, NA_character_, 48, NA_integer_, NA_character_,
"co", NA_character_, NA_character_, 28.01, NA_integer_, NA_character_,
"no", NA_character_, NA_character_, 30.01, NA_integer_, NA_character_,
"no2", NA_character_, NA_character_, 46.0055, NA_integer_, NA_character_,
"nox", NA_character_, NA_character_, 46.0055, NA_integer_, "Use 100 % no2 & may need altering for different fractions at some point",
"co2", NA_character_, NA_character_, 44.01, NA_integer_, NA_character_,
"so2", NA_character_, NA_character_, 64.066, NA_integer_, NA_character_,
"h2s", NA_character_, NA_character_, 34.08, NA_integer_, NA_character_,
"ch4", "methane", NA_character_, 16.01, NA_integer_, NA_character_,
"methane", "methane", NA_character_, 16.01, NA_integer_, NA_character_,
"o2", "oxygen", NA_character_, 31.9988, NA_integer_, "O or O2? & using O2 here",
"nh3", "ammonia", NA_character_, 17.031, NA_integer_, NA_character_,
"ethane", "ethane", "vocs", 30.07, NA_integer_, NA_character_,
"c2h6", "ethane", "vocs", 30.07, NA_integer_, NA_character_,
"ethene", "ethene", "vocs", 28.05, NA_integer_, NA_character_,
"c2h4", "ethene", "vocs", 28.05, NA_integer_, NA_character_,
"acetylene", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"ethyne", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"c2h2", "ethyne", "vocs", 26.04, NA_integer_, NA_character_,
"propane", "propane", "vocs", 44.1, NA_integer_, NA_character_,
"c3h8", "propane", "vocs", 44.1, NA_integer_, NA_character_,
"propene", "propene", "vocs", 42.08, NA_integer_, NA_character_,
"c3h6", "propene", "vocs", 42.08, NA_integer_, NA_character_,
"iso-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"i-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"2-methylpropane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"n-butane", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"c4h10", "iso-butane", "vocs", 58.12, NA_integer_, NA_character_,
"trans-2-butene", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"2-butene", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"c4h8", "2-butene", "vocs", 56.106, NA_integer_, NA_character_,
"cis-2-butene", "2-butene", "vocs", 56.1, NA_integer_, NA_character_,
"2-butene", "2-butene", "vocs", 56.1, 0, "different isomers & users need to use the specific name",
"c4h8", "2-butene", "vocs", 56.1, 0, "different isomers & users need to use the specific name",
"but-1-ene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"1-butene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"butene", "1-butene", "vocs", 56.11, NA_integer_, NA_character_,
"iso-pentane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"i-pentane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"2-methylbutane", "iso-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"n-pentane", "n-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"c5h12", "n-pentane", "vocs", 72.15, NA_integer_, NA_character_,
"1,3-butadiene", "1,3-butadiene", "vocs", 54.0916, NA_integer_, NA_character_,
"butadiene", "1,3-butadiene", "vocs", 54.0916, NA_integer_, NA_character_,
"trans-2-pentene", "2-pentene", "vocs", 70.13, NA_integer_, NA_character_,
"2-pentene", "2-pentene", "vocs", 70.13, NA_integer_, NA_character_,
"pent-1-ene", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"pentene", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"c5h10", "pentene", "vocs", 70.13, NA_integer_, NA_character_,
"2,3-methyl pentanes", "2,3-methyl pentanes", "vocs", 86.1754, NA_integer_, NA_character_,
"2,3-dimethylbutane", "2,3-methyl pentanes", "vocs", 86.1754, NA_integer_, NA_character_,
"hexane", "hexane", "vocs", 86.18, NA_integer_, NA_character_,
"c6h14", "hexane", "vocs", 86.18, NA_integer_, NA_character_,
"isoprene", "isoprene", "vocs", 68.12, NA_integer_, NA_character_,
"c5h8", "isoprene", "vocs", 68.12, NA_integer_, NA_character_,
"heptane", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"n-heptane", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"c7h16", "heptane", "vocs", 100.21, NA_integer_, NA_character_,
"benzene", "benzene", "vocs", 78.11, NA_integer_, NA_character_,
"c6h6", "benzene", "vocs", 78.11, NA_integer_, NA_character_,
"224-TMP", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"2,2,4-tmp", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"iso-octane", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"2,2,4-trimethylpentane", "2,2,4-trimethylpentane", "vocs", 114.232, NA_integer_, NA_character_,
"octane", "octane", "vocs", 114.23, NA_integer_, NA_character_,
"n-octane", "octane", "vocs", 114.23, NA_integer_, NA_character_,
"toluene", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"methylbenzene", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"c7h8", "toluene", "vocs", 92.14, NA_integer_, NA_character_,
"h2o", "water", NA_character_, 18.01528, NA_integer_, NA_character_
)
if (unique_names) df <- filter(df, unique_name != 0L | is.na(unique_name))
return(df)
}
#' @rdname gas_volume_to_mass
#'
#' @export
milligram_to_microgram <- function(x) x * 1000
#' @rdname gas_volume_to_mass
#'
#' @export
microgram_to_milligram <- function(x) x / milligram_to_microgram(1)
#' @rdname gas_volume_to_mass
#'
#' @export
ppb_to_ppm <- function(x) x / 1000
#' @rdname gas_volume_to_mass
#'
#' @export
ppm_to_ppb <- function(x) x / ppb_to_ppm(1)
#' @rdname gas_volume_to_mass
#'
#' @export
ppt_to_ppb <- function(x) x / 1000
#' @rdname gas_volume_to_mass
#'
#' @export
ppb_to_ppt <- function(x) x / ppt_to_ppb(1)
#' convert_water_percent_to_mass <- function(percent, molecular_mass = 18.01528,
#' temp = 0, pressure = 101325) {
#'
#' # Convert concentration to ppm
#' concentration <- percent * 10000
#'
#' # Do the conversion to mass in ug.m-3
#' concentration_mass <- gas_volume_to_mass(
#' concentration,
#' molecular_mass = molecular_mass,
#' temp = temp,
#' pressure = pressure,
#' unit_output = "ug_m3"
#' )
#'
#' # To g.m-3, the units usually used for absolute humidity
#' concentration_mass <- concentration_mass / 1000
#'
#' return(concentration_mass)
#'
#' }
#' convert_absolute_humidity_to_percent <- function(humidity,
#' molecular_mass = 18.01528,
#' temp = 0, pressure = 101325) {
#'
#' # Convert input unit (assumed to be g.kg-1) to ug.m-3
#' humidity <- humidity / 1000
#'
#' # Convert from mass to volume and return in ppb units
#' concentration <- gas_mass_to_volume(
#' humidity,
#' molecular_mass = molecular_mass,
#' temp = temp,
#' pressure = pressure,
#' unit_output = "ppb"
#' )
#'
#' # Transform ppb to percent
#' concentration <- concentration * 100
#'
#' return(concentration)
#'
#' }
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.