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本文利用测定甲醛和氨比西林的衍生产物,建立起一种测定饮用水中微量甲醛残留的高效液相色谱法。在加酸加热的条件下,水样中的甲醛与氨比西林直接反应,反应产物用乙醚提取出来,并用反相高效液相色谱分离荧光检测器检测。甲醛在0.1-2.0μg/ml的浓度范围内线性相关系数达0.999以上,检出限可达0.01μg/ml,相对标准偏差(RSD)为0.69%,加标回收率为95.8%-108.0%。
In this paper, the determination of formaldehyde and ampicillin derivatives, established a determination of trace amounts of formaldehyde in drinking water by high performance liquid chromatography. Under the condition of adding acid heating, the formaldehyde in water sample directly reacted with ampicillin, and the reaction product was extracted with diethyl ether and detected by reversed-phase high-performance liquid chromatography with fluorescence detector. The linear correlation coefficient of formaldehyde in the range of 0.1-2.0μg / ml was above 0.999, the detection limit was up to 0.01μg / ml, the relative standard deviation (RSD) was 0.69% and the recoveries were 95.8% -108.0%.