| abstract |
In the present invention, a method of concentrating to simultaneously analyze three harmful substances such as ethylenethiourea, maleic acid hydrazide, and isopropylmethylphosphonate contained in drinking water and water samples was used, and after concentration, iodide methyl and acetone were concentrated. After the reaction by using the three kinds of harmful substances, characterized in that after determining the concentration of methyl derivatives. The method consists in analyzing the concentrations of the above three hazardous substances using gas chromatography (GC) or gas chromatography (GC) -mass spectrometry (MS). When analyzing in a water sample by the method of the present invention, it is possible to simultaneously obtain excellent sensitivity, shortening and simplicity of analysis time, economy, and prevention of secondary contamination generated when using an extraction solvent. |