对气相色谱法测定饮用水中卤代烃用取样瓶的改进

Improvement of sampling bottle for determination of halohydrocarbon in drinking water by gas chromatography

对采用气相色谱法测定饮用水中卤代烃所用的取样瓶作了改进 ,消除了由于针头反复穿刺取样瓶气密性逐渐降低的现象 ,并改用移液管直接取样。方法简便实用 ,提高了测定结果的准确性 ,相对标准偏差为 2 .6 %。

The sampling bottle used for determination of halohydrocarbon in drinking water by gas chromatography was improved. The deterioration of the tightness of the bottle due to the repetitive puncture of needle is eliminated and the pipette is used for direct sampling. The method is simple and practical. The precision is improved with the RSD of 2.6%.