Tt.ppm: Calculation of ppm or ppb of a solid

In teoten108/kgv: Statistical tools for basic analysis used in evironmental geo-sciences

Calculation of ppm or ppb of a solid

Description

The function calculates proportion of element contained in a solid, express as mass units of element per mass units of sample (g, ug, mg, Kg), after being processed through a solution, particularly useful after reading absorbance AA, ICP, etc.

Usage

Tt.ppm(solid, solution, concentration, mol = NULL, solid.u = "g",
  solution.u = "ml", concentration.u = "mg",
  result.units = list(element = "mg", sample = "Kg"))

Arguments

solid	mass of the solid processed in a solution
solution	volume of the solution where the solid was processed
concentration	concentration obtained after the lecture
mol	if some units are expressed as mol, molar weght should be specified
solid.u	units in which the solid is expressed ("g", "mg", "ug", "Kg")
solution.u	units in which the solution is expressed ("l", "ml", "ul")
concentration.u	units of mass per Liter, in which the concentratoin is expressed ("g", "mg", "ug", "Kg", "M", "mM", "uM")
result.units	mass units of element per mass units of sample. See details

Details

Units of mass can be expressed as proportions of grams ('ug', 'mg', 'g', 'Kg') or mol ('M', 'mM', 'uM'). Units of volume as proportions of liter ('l','ml','ul'). This apply for both parameters, units ("solid.u", "solution.u" and "concentration.u") and "result.units" (units to express the results).

"result.units" is of class lists. If only one unit is changed, all the other parameters must be enter again as part of the list

Make sure that "concentration" is given as mass unit per liter. The function can addapt mass units, but is not addapted to change liter.

Value

returns the proportion of element contained in a solid, expressed in terms specified under "result.units"

Examples

# Proline in plants
# 0.1014g of plant were processed in 7.5ml of water
# The laboratory results give 13.009 uM/L proline (molar weight 75.066)
# We want to express the results as mg of proline per Kg of plant
Tt.ppm(solid=0.1014,solution=7.5,concentration=13.009,mol=75.066,solid.u='g',solution.u='ml',concentration.u='uM', result.units=list(element='ug',sample='g'))

# Soil was digested in aqua regia, and diluted at 25ml for ICP
soil <- c(0.266,0.271,0.277,0.243,0.257) # weight of samples of soil for digestion
As <- c(0.054968685,0.056348685,0.090648685,0.057058685,0.070963685) # results from ICP for As
Pb <- c(0.837786373333334,0.916599706666667,0.886459706666667,0.86488304,0.981849706666667) # ICP Pb
icp <- data.frame(As,Pb)
Tt.ppm(soil,25,icp)

teoten108/kgv documentation built on Sept. 22, 2022, 12:54 a.m.