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Test method for determination of phosphorus content laundry detergent formulation

by:Meibao     2020-10-18
Test method for determination of phosphorus content laundry detergent formulation ( 1) Take 1 sample digestion: accurate said. 500 g commercial detergent samples, 10 ml perchloric acid digestion, then heating in 10 ml of hydrogen peroxide to top up, be repeated until the samples thoroughly with a white solid, deionized water dissolved, the capacity to 250 ml. ( 2) Phosphorus molybdenum blue color test solution: precise quantitative standards or move will take to test solution in 25 ml colorimetric tube, to participate in a moderate amount of ammonium molybdate - Dilute sulfuric acid solution, a moderate amount of reducing agent, to near scale, shake well, boiling water bath heating will time out after cooling, deionized water diluted to scale. ( 3) Phosphorus standard solution and sample determination: laundry detergent sample solution are conducted in the optimization of experimental conditions of phosphorus molybdenum blue color, with ammonium molybdate - Sulfuric acid solution as the blank reference, choose 1 cm color dish in the determination of maximum absorption wavelength of 630 nm absorbance. Next article: detergent production of common problems and solutions for an article summary: washing supplies detergent formula analysis what is the role?
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