Nitrogen dioxide (NO2) is released into the air when burning coal. A company is

Question

Nitrogen dioxide (NO2) is released into the air when burning coal. A company is trying to determine if they need to replace their smoke stack scrubbers. First, they must measure a baseline for the emissions over a two week period. Each morning, they generated a calibration curve for nitrogen dioxide and measured a blank 30 times. The equation for the calibration for a specific day is given below along with the standard deviation of the blank. The nitrogen dioxide concentrations measured over the study were 52.5, 55.5, 65.0, 47.8, 78.0, 66.9, 68.0, 62.3, 57.8, 54.2, 55.8, 75.8, 24.3, and 60.3 ppmv. y-4.01x lank 3.75 ppmv a. What is the limit of detection for nitrogen dioxide? b. What is the limit of quantitation for nitrogen dioxide? What is the average and standard deviation of nitrogen dioxide in mg/L? (convert ppmv to mg/L, assume STP, make show you show ALL work) c. d. What is the percent relative standard deviation for the study?

Explanation / Answer

a) limit for detecting nitrogen dioxide = 18 g/m3

b) limit of quantization of nitrogen dioxide = 119.7 pico metre

c) mean and sd of nitrogen dioxide are

59.36 and 13.57 respectively

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