ISO 787-9:1981 颜料和填充剂的一般试验方法.第9部分:水悬浮液pH值的测定
标准编号:ISO 787-9:1981
中文名称:颜料和填充剂的一般试验方法.第9部分:水悬浮液pH值的测定
英文名称:General methods of test for pigments and extenders — Part 9: Determination of pH value of an aqueous suspension
发布日期:1981-09
标准范围
使用的水应为新鲜蒸馏水,在使用前煮沸,但只需5至10分钟,以避免其pH值因玻璃中的碱溶解而增加。制备受试材料的悬浮液,塞住容器,摇晃,随时静置,移除塞子,并测定悬浮液的pH值,精确至0.1单位。-取消并取代ISO建议R 787/9-1970。
The water used shall be freshly distilled water, boiled before use, but for 5 to 10 min only, in order to avoid an increase of its pH value due to alkali dissolved from the glass. Preparation of a suspension of the material under test, stopper the container, shaking, allow to stand any time, removing the stopper and determination, to the nearest 0.1 unit, of the pH value of the suspension. - Cancels and replaces ISO Recommendation R 787/9-1970.
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