硝酸银是感光材料工业的基本原材料之一,其纯度对感光材料的质量有不容忽视的影响。铅和铋是公认的减感元素,弄清它们在硝酸银中的含量,并设法在生产过程中将它们控制在一定的范围以内,对感光工业是极为重要的。国外各大感光胶片厂家对硝酸银中杂质的含量,都有严格的内控标准,但分析方法一般不公开发表。文献上能见到的少量工 Silver nitrate is one of the basic raw materials for the photographic materials industry, its purity can not be ignored the quality of photosensitive materials. Lead and bismuth are recognized desensitizing elements. It is important for the photographic industry to understand their content in silver nitrate and to try to keep them within a certain range in the production process. Foreign major photographic film manufacturers on the content of silver nitrate impurities, have strict internal control standards, but the analytical methods are generally not published. A small number of workers can be found in the literature