Résumé
The method is based on weighing a test portion, dissolving it in water, transfer of the solution to each of two Nessler colour-comparison cylinders, preparing a test solution by adding freshly prepared ammoniacal silver nitrate solution to one of the Nessler cylinders and mixing well, preparing a blank solution by adding ammonium hydroxide solution and water to the other Nessler cylinder and mixing well, allowing the solutions to stand for 2 min, and comparing the colour and turbidity of the two solutions.
Informations générales
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État actuel: PubliéeDate de publication: 1992-12Stade: Norme internationale confirmée [90.93]
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Edition: 1
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Comité technique :ISO/TC 42ICS :37.040.30
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