Low concentrations of methylmercury near the detection limit gave the dimensionless instrument readings: 208.1 , 176.5...

Low concentrations of methylmercury near the detection limit gave the dimensionless instrument readings: 208.1 , 176.5 , 165.1 , 177.1 , 222.1 , 162.9 , 225.9 , 204.5 , 137.5 , and 208.3 . Ten blanks had a mean reading of 41.9 . The slope of the calibration curve is 1.45 × 10 9 M − 1 . Estimate the signal and concentration detection limits and the lower limit of quantitation for methylmercury.

Expert Solution

queen_honey_blossom answered 4 months ago

Low concentrations of EDTA near the detection limit gave the following dimensionless instrument readings: 175, 104,...

Low concentrations of EDTA near the detection limit gave the following dimensionless instrument readings: 175, 104, 164, 193, 131, 189, 155, 133, 151, and 176. Ten blanks had a mean reading of 50.0. The slope of the calibration curve is 1.75 x 10^-9 M^-1. 1. Estimate the signal detection limit for EDTA. (with correct sig figs) 2. What is the concentration detection limit? (with correct sig figs) 3. What is the lower limit of quantification? (with correct sig figs)

"Low concentrations of dioxin near the detection limit gave the following dimensionless instrument readings: 193.3, 156.5,...

"Low concentrations of dioxin near the detection limit gave the following dimensionless instrument readings: 193.3, 156.5, 150.3, 162.3, 207.3, 148.1, 211.1, 189.7, 122.7, and 193.5. Ten blanks had a mean reading of 47.3. The slope of the calibration curve is 2.55 × 10x9 M–1. Estimate the signal and concentration detection limits and the lower limit of quantitation for dioxin." I know the signal detection limit is yblank + 3s and the concentration limit is 3s/m, but what is ysample to...

Low concentrations of Ni-EDTA near the detection limit gave the following counts in a mass spectral...

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Match each method validation term to its definition. Precision Detection limit Range Specificity Quantitation Limit Accuracy...

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Arsenic is a compound naturally occurring in very low concentrations. Arsenic blood concentrations in healthy individuals...

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A 25.0 mL sample containing Ni2+ was analyzed and gave an instrument siganl of 23.6 units...

A 25.0 mL sample containing Ni2+ was analyzed and gave an instrument siganl of 23.6 units (corrected for a blank). When exactly 0.500 mL of 0.0287 Ni(NO3)2 was added to the solution, the signal increased to 37.9 units. Calculate the molar concentration of Ni2+ assuming that the signal was directly proportional to the analyte concentration. I was told this was a single addition standard addition problem, but I'm not sure how to work it. Thanks!

Arsenic occurs naturally in very low concentrations. In healthy human adults arsenic blood concentrations are approximately...

Arsenic occurs naturally in very low concentrations. In healthy human adults arsenic blood concentrations are approximately Normally distributed with mean 3.9 μg/dL (micrograms per decilitre) and standard deviation 1.4 μg/dL. For the purposes of this question, assume that the distribution of arsenic blood concentrations is exactly as just described. (a) What proportion of healthy adults have arsenic blood concentrations between 2 and 4.5 μg/dL? [3] (b) Choosing a healthy adult at random, what is the chance that their arsenic blood...

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