Read Harris, D.C., Quantitative Chemical Analysis, Section 5-4- \"Internal Stand

Question

Read Harris, D.C., Quantitative Chemical Analysis, Section 5-4- "Internal Standards" Use the following data to verify a constant response for a chromatographic analysis,employing an Internal standard. Internal alyte (ppm) Standard Analyte Internal (ppm) Peak Area Standard Peak Area 12.00 4.00 594 4116 116.00 ||14.00 ][4248 110507 114.00||14.0014186 14019 Make a plot, the slope of which will correspond to the response factor F, by entering the appropriate x and y E quantities into the following table. 6.8 ; 0.61 : (I(Analyte ppm)/(Standard ([(Analyte peak area)/(Standard peak Sample! .4 : 1) 0.1443 0.4043 1.0416 0.2 0.1429 0.429 1.000 0 0.20.4 o.60.81 (An aly te pp)/ (Standard ppm) A score has been assign

Explanation / Answer

Here slope

F = xy/ x2 = 1.2357/ 1.2044 = 1.026

here standard error of slope

Sb = sqrt [ { y2 -  (xy)2/x2 }/ {(n-1) x2 ]

sb = 0.025

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