**Determination of Cl⁻ Content in Rain Water Using Ion Chromatography**An analyst determines the chloride ion (Cl⁻) content of rain water using ion chromatography. The data for the calibration line in the range 5 to 50 milliequivalents per liter (mEq/L) is shown in the table below. Additionally, a blank sample was analyzed 5 times with the following results obtained: 1.1, 0.5, 0.1, 0.9, and 1.2 ppm Cl⁻.**Objective:**Calculate the detection limit (DL) for the method with a 98.3% confidence level. Use all given data and show the equations.**Calibration Data Table:**| [Cl⁻] (mEq/L) | Response ||---------------|----------|| 5 | 18.0 || 10 | 29.1 || 20 | 68.4 || 30 | 87.3 || 40 | 129.6 || 50 | 166.8 |**Steps to calculate the detection limit (DL):**1. **Calculate the mean (average) and standard deviation of the blank sample measurements:** - Mean (average) of blank sample amounts: \[ \text{Mean} = \frac{1.1 + 0.5 + 0.1 + 0.9 + 1.2}{5} = \frac{3.8}{5} = 0.76 \] - Standard deviation (s) of blank sample amounts: \[ \text{Standard deviation} = \sqrt{\frac{\sum (x_i - \bar{x})^2}{n - 1}} \] Where \(x_i\) are individual measurements, \( \bar{x} \) is the mean, and \(n\) is the number of measurements (5 in this case).2. **Determine the t-value for the 98.3% confidence level and 4 degrees of freedom:** - Use the t-distribution table to find the t-value.3. **Calculate the Detection Limit (DL):** - Detection Limit (DL) can be calculated using the formula: \[ \text{DL} =

IntroductionAn analyst is using ion chromatography to determine the concentration of chloride ions…

An analyst determines the Ct content of rain water with ion chromatography. The data for the calibration line in the range 5 to 50 milli equivalents per liter (mEq/L) is shown in the table below. Additionally, a blank sample was analysed 5 times and the following results obtained: 1.1, 0.5, 0.1, 0.9 and 1.2 ppm Ct Calculate the detection limit (DL) for the method with a 98.3% confidence level. Use ALL data and show equations. [CH] (mEq/L) Response 5 18.0 10 29.1 20 68.4 30 87.3 40 129.6 50 166.8

An analyst determines the Ct content of rain water with ion chromatography. The data for the calibration line in the range 5 to 50 milli equivalents per liter (mEq/L) is shown in the table below. Additionally, a blank sample was analysed 5 times and the following results obtained: 1.1, 0.5, 0.1, 0.9 and 1.2 ppm Ct Calculate the detection limit (DL) for the method with a 98.3% confidence level. Use ALL data and show equations. [CH] (mEq/L) Response 5 18.0 10 29.1 20 68.4 30 87.3 40 129.6 50 166.8

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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