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WebExperts with international know-how. We are a leading global consultancy to the chemical industry and, as an independent service provider, we support our clients in the review, implementation and observation of national and international chemical regulations. We use our scientific, technical and strategic know-how to overcome regulatory ... WebThe standard of paraquat was obtained from chemservice, USA with purity of 99.9%. The analytical grade of potassium hydroxide, hydrochloric acid, n-hexane, and methanol were obtained from Merck, Germany. Aquabides was used to make potassium hydroxide solution, dilute hydrochloric acid and methanol, also as a mobile phase that spelling comments for year 9 report card