ISO 3195:1975 工业用氢氧化钠.取样.试样.供某些测定用的主溶液的配制

标准编号：ISO 3195:1975

中文名称：工业用氢氧化钠.取样.试样.供某些测定用的主溶液的配制

英文名称：Sodium hydroxide for industrial use — Sampling — Test Sample — Preparation of the main solution for carrying out certain determinations

发布日期：1975-03

标准范围

指示应制备试样的条件，并与需要特殊预处理的特定特性有关:应在干燥空气中快速采集试样，并将其储存在密封瓶中。瓶子应由惰性材料制成，如聚乙烯。用蒸馏无碳酸水制备主溶液。如果要测定二氧化硅含量，则应将试样溶解在由聚乙烯或银等无硅材料制成的容器中。取消并替换ISO建议R 977/1969和R 978/1969。

Indicates the conditions under which the test sample shall be prepared and relates to particular properties which require particular precausions: the samples shall be taken rapidly in a dry atmosphere, storage in an airtight bottle. The bottle shall be made from an inert material such as polyethylene. Preparation of the main solution with distilled carbonat- free water. If the silica content is to be determined the test portion shall be dissolved in a container made from silica-free material such as polyethylene or silver. Cancels and replaces ISO Recommendations R 977/1969 and R 978/1969.

标准预览图