Question

Plotting concentration in ppm on the x-axis and intensity in mV on the y-axis producesa linear calibration of y-125x +254. (a) What is the sensitivity? (2 pts) (b) What is the detection limit if the standard deviation of the lowest concentration is 1114 mV? (3 pts) (c) What is the concentration of an unknown that produced a signal of 6998 mV? (3 pts) Calculate the S/N ratio for the following peaks: peak 1 intensity 5400, peak 2 intensity 650, and peak 3 intensity 25400. The noise is 110.(use whole numbers, no decimals) (6 pts)

Answer 1

Anstver efnet flot. -O Sensitivity=_ = 125 (b) detection limit. detci Standard deviation slofe 125 = 8.912 ppm Cc) To find out conceratun of an untnoan that produred signal eg48 mV here, y=eqq2mV χ 6998-259 1 23 an un knoon

To cacwade ratio we know 3 死= 1043833 S10498