5) A 0.50 g soil sample was digested with 1.0 mL of HNO3-H2O2 mixture (1:1, v/v) and then diluted to 25.0 mL in order to find its copper concentration by flame atomic absorption spectrophotometer (FAAS). Next, 5.0 mL of this solution was diluted to 100 mL and then analyzed by FAAS system. The average absorbance for this solution was 0.0197. A series of copper standard solution (0.10-5.0 mg/L) was analyzed by FAAS system and linear equation for copper calibration plot was recorded as y-0.04x+0.0097 where y was absorbance and x was copper concentration as mg/L. Calculate copper concentration in the soil sample as mg/kg.

5) A 0.50 g soil sample was digested with 1.0 mL of HNO3-H2O2 mixture (1:1, v/v) and then diluted to 25.0 mL in order to find its copper concentration by flame atomic absorption spectrophotometer (FAAS). Next, 5.0 mL of this solution was diluted to 100 mL and then analyzed by FAAS system. The average absorbance for this solution was 0.0197. A series of copper standard solution (0.10-5.0 mg/L) was analyzed by FAAS system and linear equation for copper calibration plot was recorded as y-0.04x+0.0097 where y was absorbance and x was copper concentration as mg/L. Calculate copper concentration in the soil sample as mg/kg.

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter15: Molecular Luminescence Spectrometry

Section: Chapter Questions

Problem 15.10QAP

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