AQSys.LevArmRule {LLSR}

Lever-Arm Rule - tie-line's Composition Calculation

Description

Merchuk et al. described a very straightforward method to calculate the concentration of each component in the tieline giving only its global composition and phase's properties (such as volume and density). Here this method is implemented and generalized for multiple mathematical descriptors.

Usage

## S3 method for class 'LevArmRule'
AQSys(
  dataSET,
  modelName = "merchuk",
  Xm,
  Ym,
  Vt = NULL,
  Vb = NULL,
  dyt = NULL,
  dyb = NULL,
  WT = NULL,
  WB = NULL,
  byW = TRUE,
  Order = "xy",
  ...
)

Arguments

dataSET

- Binodal Experimental data that will be used in the nonlinear fit

modelName

- Character String specifying the nonlinear empirical equation to fit data. The default method uses Merchuk's equation. Other mathematical descriptors can be listed using AQSysList().

Xm

- Component X's concentration in the tieline's global composition.

Ym

- Component Y's concentration in the tieline's global composition.

Vt

- Tieline's TOP phase volume.

Vb

- Tieline's BOTTOM phase volume.

dyt

- Tieline's TOP phase density

dyb

- Tieline's BOTTOM phase density

WT

- ATPS upper phase weight

WB

- ATPS bottom phase weight

byW

- Use weight (TRUE) or volume and density (FALSE) during lever arm rule calculation.

Order

Defines how the data is organized in the Worksheet. Use "xy" whether the first column corresponds to the lower phase fraction and "yx" whether the opposite.

...

Additional optional arguments. None are used at present.

Details

Using any implemented binodal data mathematical descriptor, the global composition of a chosen tieline and its phases properties.

Value

The function returns the Critical Point (X,Y), Tieline Length (TLL), Tieline's Equivolume point (xVRe2o,yVRe2o), and Tieline's Slope.

References

MERCHUK, J. C.; ANDREWS, B. A.; ASENJO, J. A. Aqueous two-phase systems for protein separation: Studies on phase inversion. Journal of Chromatography B: Biomedical Sciences and Applications, v. 711, n. 1-2, p. 285-293, 1998. ISSN 0378-4347. (ScienceDIrect)

Examples

## Not run: 
AQSys.LevArmRule(dataSET, Xm, Ym, Vt, Vb, dyt, dyb, WT, WB, byW = FALSE)

## End(Not run)