摘要：介绍了低浊度值聚苯乙烯乳胶粒子浊度标准液的制备、定值及使用方法。该低浊度值聚苯乙烯乳胶粒子浊度标准液符合国际标准７０２７的要求 ,具有良好的均匀性和稳定性 ,定值准确可靠 ,浊度标准值为１００ＮＴＵ ;定值不确定度为４ % (ｋ＝２),在低浊度范围可替代Ｆｏｒｍａｚｉｎｅ浊度标准物质。

关键词： 浊度;标准液;聚苯乙烯粒子

Abstract: The methods of preparation certification and use for polystyene particles of low turbidity standard solution are introduced． The low turbidity standard solution is up to the international standard 7027．The homogeneity and stability is qualified the turbidity standard value is100NTU and the uncertainty of certification is4％（k= 2） ．The low turbidity standard solution will substitute for formazine turbidity standard solution within the range of low turbidity ． 

Key words:turbidity；standard solution；polystyrene particles．