UV-1100 Determination of Sulfate in Water - Master's thesis - Dissertation

Determination of Sulfate in Water

The sulfate content in water can be determined using spectrophotometry. This method is widely used in environmental and industrial analysis. Key instruments include the V-1100 and V-1200 spectrophotometers, which are reliable tools for chemical analysis. Here’s a step-by-step procedure: 1. Take 50 ml of the water sample and place it in a 150 ml Erlenmeyer flask. 2. Add 1 ml of 2.5 mol/L hydrochloric acid and boil the mixture for 5 minutes. 3. Remove 2.5 ml of bismuth chromate suspension and heat for an additional 5 minutes. 4. Cool the solution, then add 1+1 ammonia water until a yellow color appears. Add two more drops of the reagent and dilute to 50 ml using a colorimetric tube, ensuring thorough mixing. 5. Filter the solution through dry, slow quantitative filter paper. Discard the first 5 ml of filtrate and collect the remaining filtrate in a 25 ml dry colorimetric tube. 6. Measure the absorbance at 420 nm using a 0.5 cm cuvette with pure water as the reference. The formula for calculating sulfate concentration is:

Keywords: spectrophotometer; water sulfate; analytical instrument; US; V-1100; V-1200