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ISO 6835:1981
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ISO 6835:1981 Surface active agents -- Washing powders -- Determination of total boron content -- Titrimetric method
standard by International Organization for Standardization, 04/01/1981
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From an aqueous aolution of a sample the phosphates are removed by passing the solution over an ion-exchange resin. Then a boric acid mannitol complex is formed and titrated.