CAJ | 학술논문

对传统的采用苯磺酰氯衍生、气相色谱法检测水中二甲胺的方法进行了改进,以满足快速检测痕量二甲胺的需要.改进后的方法,前处理时间大大缩短,在1.5 h内可同时衍生25个水样,检测所需水样体积减少了95%,溶剂用量减少了90%,同时采用氢火焰检测器(FID)代替了昂贵的质谱检测器并对色谱条件进行了优化.改进后方法检出限为0.5μg/L,二甲胺的线性范围为1.0～50.0μg/L时,标准偏差(SD)为0.048～0.221μg/L,相对标准偏差(RSD)≤4.43%,水样加标回收率为95.0%～104.6%.改进后的方法检测快速,并具有良好的精密度和准确度,可用于快速分析饮用水中的痕量二甲胺及其他简单的一级和二级脂肪胺.
대전통적채용분광선록연생、기상색보법검측수중이갑알적방법진행료개진,이만족쾌속검측흔량이갑알적수요.개진후적방법,전처리시간대대축단,재1.5 h내가동시연생25개수양,검측소수수양체적감소료95%,용제용량감소료90%,동시채용경화염검측기(FID)대체료앙귀적질보검측기병대색보조건진행료우화.개진후방법검출한위0.5μg/L,이갑알적선성범위위1.0～50.0μg/L시,표준편차(SD)위0.048～0.221μg/L,상대표준편차(RSD)≤4.43%,수양가표회수솔위95.0%～104.6%.개진후적방법검측쾌속,병구유량호적정밀도화준학도,가용우쾌속분석음용수중적흔량이갑알급기타간단적일급화이급지방알.
The traditional gas chromatography after derivatization with benzenesulfonyl chloride was improved to meet the requirement for quick determination of trace dimethylamine (DMA) in water. After the improvement, the pretreatment time is decreased remarkably, 25 samples can be derived at the same time within 1.5 h, and the sample volume and solvent volume are reduced by 95% and 90% re-spectively. The expensive MS detector was replaced by FID, and the chromatographic condition was opti-mized. The detection limit of the improved method is 0.5μg/L, the linear range of DMA is 1.0 to 50.0 μg/L, the standard deviation is O. 048 to 0.221 μg/L, the relative standard deviation is equal to or less than 4.43%, and the recovery with standard addition is 95.0% to 104.6%. The improved method is quick in determination and has good precision and accuracy. It can be used for quick determination of trace DMA and other primary and secondary aliphatic amines in water.