Calculating Response Factors

In summary, the conversation discusses determining response factors for Na and K using a Li internal standard and concentration and signal ratios. The equations used are Ax/x = F(As/s) and the calculations result in response factors of 13.5 for Na and 17.7 for K, which appear to be correct. The context of the problem is likely related to chromatography and spectroscopy.
  • #1
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Homework Statement



Determine the response factors for both Na and K with the Li internal standard

Concentration Ratio
Na : K : Li (in ppm)
5.0 : 5.0: 500
-------------------

Signal Ratio
Na : K : Li (relative units)
4.9 : 6.4: 36.2

Homework Equations



Ax/x = F(As/s)
Ax = Absorbtion signal of analyte
x = concentration of analyte
F = response factor
As = absorbtion signal of standard
s = concentration of standard

The Attempt at a Solution



Calculation for Na

(4.9)/(5.0) = F [(36.2)/(500)]
F = 13.5

Calculation for K

(6.4)/(5.0) = F [(36.2)/(500)]
F = 17.7

Seems simple enough right? So I was hoping that someone would be able to tell me if this is correct or incorrect because I have a funny feeling I did something strange (problem was too easy).
 
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  • #2
It would be helpful to have more information on the equation and the reference, but based on the limited information provided, Ax/x = F(As/s), it would appear that the answers given are correct.

Is the problem/question based on an example of chromatography and spectroscopy?
 

1. What is a Response Factor?

A Response Factor is a numerical value that represents the relationship between the concentration of a compound and the detector response in a chromatographic analysis. It is used to convert detector signals into actual concentrations of the compound in a sample.

2. How is a Response Factor calculated?

A Response Factor is calculated by dividing the detector response of a known concentration of a compound by the known concentration of that compound. The result is a dimensionless value that is specific to the compound and the analytical method being used.

3. What factors can affect Response Factors?

Response Factors can be affected by various factors such as the type of detector used, the composition of the sample matrix, and the temperature and pressure of the analysis. It is important to calibrate Response Factors for each specific analytical method to minimize any potential variations.

4. What is the significance of Response Factors in analytical chemistry?

Response Factors are crucial in converting detector signals into accurate concentrations of compounds in a sample. They also help to standardize analytical methods and ensure the accuracy and reproducibility of results across different instruments and laboratories.

5. Can Response Factors be used for quantitative analysis?

Yes, Response Factors are commonly used in quantitative analysis to determine the concentration of compounds in a sample. By multiplying the detector response by the Response Factor, the actual concentration of the compound can be calculated. However, it is important to validate the accuracy of the Response Factor for each specific analytical method.

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