Here are mass spectrometric signals for methane in H2: CH4 (vol%): 0 0.062 0.122 0.245
Chapter 4, Problem 4-33(choose chapter or problem)
Here are mass spectrometric signals for methane in H2: CH4 (vol%): 0 0.062 0.122 0.245 0.486 0.971 1.921 Signal (mV): 9.1 47.5 95.6 193.8 387.5 812.5 1 671.9 (a) Subtract the blank value (9.1) from all other values. Then use the method of least squares to find the slope and intercept and their uncertainties. Construct a calibration curve. (b) Replicate measurements of an unknown gave 152.1, 154.9, 153.9, and 155.1 mV, and a blank gave 8.2, 9.4, 10.6, and 7.8 mV. Subtract the average blank from the average unknown to find the average corrected signal for the unknown. (c) Find the concentration of the unknown and its uncertainty.
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