The area of a peak from a gas chromatograph using a thermal conductivity detecto

Question

The area of a peak from a gas chromatograph using a thermal conductivity detector is proportional to the percentage of that component in the sample so the sum of the peak areas is equal to 100%. If we assume that the peaks can be approximated as triangles, the equation for the area of a triangle may be used to calculate the peak area. A = 1/2 base * height Use triangulation to calculate the area for peak A and peak B. Make use that you estimate one place beyond the finest graduation on your ruler. Calculate the area for each peak, then the total area, and finally calculate the % of A and % of B. (Show Work)

Explanation / Answer

Lets say the height of peak A = 1

and

height of peak B = 0.7

Also,

base of peak A = 3

and,

base of peak B = 2.5

then,

Area of peak A = 3 x 1/2 = 1.500

Area of peak B = 0.7 x 2.5/2 = 0.583

Total area = 2.083

Area %A = 1.5 x 100/2.083 = 72.01%

Area% B = 0.583 x 100/2.083 = 27.99%

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