wo natural gas samples are going to be analyzed for its helium content by mass spectrometry....

wo natural gas samples are going to be analyzed for its helium content by mass spectrometry.

The following signals were recorded for helium standards:

He (vol%) 0.000 0.061 0.123 0.485 0.978 1.913

Signal (mV) 7.8 47.3 95.8 387.1 812.8 1547.1

a) Construct a calibration curve using EXCEL.

b) Find the equation for the straight line and state the R²

c) The unknown natural gas samples gave signals of 234.9 mV and 925.7 mV. Find the respective concentrations of helium in the two natural gas samples. Mark these two data points in your plot of the calibration curve.

Expert Solution

queen_honey_blossom answered 2 years ago

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