calculate_w: Calculate FFF channel thickness

In bentrueman/fffprocessr: Process FFF-UV-MALS-ICP-MS Data

Calculate FFF channel thickness

Description

Estimate the FFF channel thickness using the method described in Litzen (1993).

Usage

calculate_w(
  t1,
  D,
  focus = 10,
  transition = 1,
  w = 500/1e+06,
  Vc = 0.0025,
  Vout = 0.001,
  Vin = 5e-04,
  temp = 25,
  eta = 0.00089,
  dims = chamber_dims,
  tol = 1e-06,
  maxiter = 10
)

Arguments

t1	Retention time, in minutes.
D	Diffusion coefficient of standard.
focus	Focus period, in minutes.
transition	Transition time between focusing and elution, in minutes.
w	Nominal channel thickness, in metres.
Vc	Cross-flow rate, in L/min.
Vout	Detector flow rate, in L/min.
Vin	Injection flow rate, in L/min.
temp	Temperature, degrees Celsius.
eta	Dynamic viscosity, in N * s / m^2.
dims	A list with the elements L, b1, b2, and z1, as defined in Wang et al. (2018, units of cm).
tol	Solution is arrived at iteratively; tol represents the difference between successive iterations.
maxiter	Maximum iterations.

Value

A numeric vector of length one representing the estimated FFF channel thickness.

References

1. Wang, J.-L.; Alasonati, E.; Fisicaro, P.; Benedetti, M. F.; Martin, M. Theoretical and Experimental Investigation of the Focusing Position in Asymmetrical Flow Field-Flow Fractionation (AF4). Journal of Chromatography A 2018, 1561, 67–75. https://doi.org/10.1016/j.chroma.2018.04.056.

2. Litzen, Anne. Separation Speed, Retention, and Dispersion in Asymmetrical Flow Field-Flow Fractionation as Functions of Channel Dimensions and Flow Rates. Anal. Chem. 1993, 65 (4), 461–470. https://doi.org/10.1021/ac00052a025.

See Also

calculate_rh

Examples

calculate_w(t1 = 21.2, D = .35e-10, Vc = .0015, Vin = 2e-4)

bentrueman/fffprocessr documentation built on June 23, 2024, 1:23 a.m.