水质.用流量分析法(FIA 和 CFA)和光度计检测法测定可溶性硅酸盐

[中文适用范围]： 本标准规定了流动注射分析（FIA）和连续流动分析（CFA）两种方法测定各类水（如地下水、饮用水、地表水、渗滤液和废水）中可溶性硅酸根离子。 两种方法均适用于测定硅酸盐 (SiO2) 的质量浓度，范围为 0.2 mg/l 至 20 mg/l（工作范围为 0.2 mg/l 至 2.0 mg/l 和 2 mg/l）。 l 至 20 毫克/升）。 其他质量浓度范围也适用，只要它们恰好涵盖十个浓度单位（例如，SiO2 中的 0.02 mg/l 至 0.2 mg/l）。 通过改变灵敏度并根据样品的盐度调整试剂和校准溶液，可以使这些方法适用于海水。 [外文原描述]： This International Standard specifies two methods, i.e. flow injection analysis (FIA) and continuous flow analysis (CFA), for the determination of soluble silicate ions in various types of water (such as ground, drinking, surface, leachate and waste water). Both methods are applicable to the determination of a mass concentration of silicate (SiO 2 ) ranging from 0,2 mg/l to 20 mg/l (with working ranges 0,2 mg/l to 2,0 mg/l and 2,0 mg/l to 20 mg/l). Other mass concentration ranges are applicable, provided they cover exactly one decade of concentration units (e.g. 0,02 mg/l to 0,2 mg/l in SiO 2 ). These methods can be made applicable to seawater by changing the sensitivity and by adapting the reagent and calibration solutions to the salinity of the samples.