水质 固相萃取和衍生化作用后气相色谱-质谱法测定包括苯达松和羟基苯甲腈在内的选择性苯氧烷类除草剂

[中文适用范围]： 本标准规定了地下水和饮用水中苯氧基链烷酸质量浓度≥50ng/l的测定方法（详细信息见附录A表A.1）。 表1中给出了可以通过该方法测定的苯氧基链烷酸的实例。 该方法可适用于表1中未提及的化合物或其他类型的水。 然而，有必要验证该方法对于这些特殊情况的适用性（见附件B）。 [外文原描述]： This International Standard specifies a method for the determination of phenoxyalkanoic acids in ground and drinking water in mass concentrations W 50 ng/l (detailed information is given in Table A.1 of annex A). Examples of phenoxyalkanoic acids which can be determined by this method are given in Table 1. This method may be applicable to compounds not mentioned in Table 1 or to other types of water. However, it is necessary to verify the applicability of this method for these special cases (see annex B). Table 1 — Plant treatment agents determined by this method