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Some manufacturers claim that polystyrene test tubes which are intended to be used once only, have the additional advantage of being chemically clean. Marks (1967), in a memorandum to the British Standards Institute made on behalf of the Association of Clinical Biochemists, proposed that sodium (or potassium) might be used as an indicator of contamination: ion-free water left to stand in the co...
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ژورنال
عنوان ژورنال: Science
سال: 1984
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.224.4655.1297