本标准规定了测定地面和饮用水中苯氧基酸的方法，质量浓度>0.05μg/ l。单一物质列于上述标准。该方法包括固液萃取， 衍生化和气相色谱与MS检测

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