洗浄剤中のヒ素試験法および鉛試験法

概要

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Test method of arsenic and test method of lead in detergent were established. Test method of arsenic content is as followed. Sample (fatty-acid type detergent: 5g, non-fatty-acid type detergent: 1g, detergent for automatic dish washer: 0.3g) was dissolved in 150mL of water. The sample solution (5mL) was passed ODS mini-column. The elution was made up to 10mL with water. The test solution and arsenic standard solution were added HCl and potassium iodide solution each 1mL, and measured by AAS or ICP equipped with hydride generator. Determination limits were 0.005μg/mL sample solution (as As_2O_3). Test method of lead content is as followed. Sample was dissolved in 120 mL of water. If this solution was alkalinity, the solution was neutralized with 2mol/L of nitric acid, then made up to 150 mL with water. The test solution was measured by AAS or ICP. Determination limits were 0.1μg/mL test solution. These test methods were very easy. Using these methods, the content levels in 10 products were determined. Arsenic and lead were not detected from all products.
2012-08-24