摘要
甲胺磷是一种兼具杀虫、肥料两种性能的高效、广谱农药,由于甲胺磷加热到一定温度时分解(185～190℃),所以其色谱分析时操作温度不能太高,用气相色谱法测定甲胺磷已有报道,但用指数程序薄涂柱气相色谱法测定尚未见报道,该法选择了DEGS为固定液,将0.34％、0.49％、0.7％的DEGS涂在80～100目硅烷化玻璃微球载体上,填入1 m不锈钢色谱柱进行测定,当柱温为150℃时甲胺磷即与其它成分分离,出峰时间仅为2.25 min,且峰形对称,这样既避免了操作温度高易使甲胺磷分解的缺陷,又提高了定量的准确性和分析速度,该法应用于多种样品中甲胺磷的测定,结果令人满意。
Exponential gradient loaded column gas chromatographic method for the determination of methamidophos is described. In this method, chromatogaphic characteristic of a column packed with 0. 34%, 0. 49% and 0. 7% DEGS on glass beads MDMCS(80-100 mesh) was studied. The results show that the retention time was shortened and the column temperature was lowered in comparison with other methods. The lower limit of detection was 0. 97 ug.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1991年第9期1170-1172,共3页
Chemical Journal of Chinese Universities
关键词
甲胺磷
气相色谱
农药
色谱柱
测定
Exponential gradient loaded column, Methamidophos, Gas chromatography
