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3. The nitrate content in three water samples (from 1 sampling site) submitted in the laboratory was determined at 530 n
Posted: Sat Jul 09, 2022 12:22 pm
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3. The nitrate content in three water samples (from 1 sampling site) submitted in the laboratory was determined at 530 nm using a UV-VIS spectrophotometer. In this analysis, 1 mL of the samples are diluted to 10 mL solution using distilled water. The analyst prepares a stock solution using sodium nitrate. From this stock solution 0.3, 0.6, 1.2 and 1.8 ppm standard solution. a. Using sodium nitrate powder describe how you will prepare 0.3, 0.6, 1.2, and 1.8 ppm nitrite solution from a 1 g/mL nitrite stock solution. Show your solution (10 pts) Complete the data below. Show your solution (15 pts) b. Concentration, ppm Standard 0 0.3 0.6 1.2 1.8 Sample Absorbance 0 0.2338 0.421 0.686 0.989 0.432 0.401 0.425