Table 1. Data for standard addition method Volume of Tablet Volume of standard Absorbance Final Volume solution (mL) (mL) 5.00 0.00 0.59 100.0 mL 5.00 1.00 0.74 100.0 mL 5.00 2.00 0.85 100.0 ml 5.00 3.00 1.02 100.0 ml 5.00 4.00 1.17 100.0 mL The standard solution- The solution was prepared by dissolving 0.400 g of acetyl salicylic acid in 250.0 mL of water. The same method as described by the calibration method. Tablet solution : The solution was prepared following the method described in the calibration method by reacting tablet with NaOH and finally diluting to 250.0 mL. Use this data to prepare the standard addition curve. Please remember to find the concentration of each standard solution in the volumetric flask before you plot the data.

Table 1. Data for standard addition method Volume of Tablet Volume of standard Absorbance Final Volume solution (mL) (mL) 5.00 0.00 0.59 100.0 mL 5.00 1.00 0.74 100.0 mL 5.00 2.00 0.85 100.0 ml 5.00 3.00 1.02 100.0 ml 5.00 4.00 1.17 100.0 mL The standard solution- The solution was prepared by dissolving 0.400 g of acetyl salicylic acid in 250.0 mL of water. The same method as described by the calibration method. Tablet solution : The solution was prepared following the method described in the calibration method by reacting tablet with NaOH and finally diluting to 250.0 mL. Use this data to prepare the standard addition curve. Please remember to find the concentration of each standard solution in the volumetric flask before you plot the data.

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter4: Least-squares And Calibration Methods

Section: Chapter Questions

Problem 1P

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The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? OA. Solution A: 0.123 Solution B: 0.463 O B. Solution A: 0.463 Solution B: 0.234 O C. Solution A: 0.123 Solution B: 0.234 O D. Solution A: 0.234 Solution B: 0.463
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The standard addition method is used to analyze a sample of a river water for mercury. Solution A is made by pipetting 5.00 mL of undiluted sample in to a 10 mL volumetric flask and filling to the mark with DI water. Solution B is made by pipetting 5.00 mL of undiluted sample and 3.00 mL of 15.0 ppb of Hg standard into same 10.0 mL volumetric flask and filling to the mark with DI. Solution A and B are analyzed using atomic absorption spectroscopy and give a percent transmittance values of 56 % and 33 % respectively (not blank corrected). A blank has a transmittance of 96%. What is the corrected absorbance of both solution A and B? O A. Solution A: 0.123 Solution B: 0.463 O B. Solution A: 0.463 Solution B: 0.234 O C. Solution A: 0.123 O D. Solution A: 0.234 Solution B: 0.234 Solution B: 0.463
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