标准摘要
[中文适用范围]： 该方法的基础是称取一份测试部分，将其溶解在水中，将溶液转移到两个纳氏比色量筒中的每一个中，通过将新鲜制备的氨硝酸银溶液添加到其中一个纳氏量筒中并充分混合来制备测试溶液另一纳氏量筒中加入氢氧化铵溶液和水，混匀，静置2min，制备空白溶液，比较两种溶液的颜色和浊度。 [外文原描述]： 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.
英文名称Photography — Photographic-grade chemicals — Test methods — Part 9: Reaction to ammoniacal silver nitrate