光谱学与光谱分析, 2012, 32 (12): 3217, 网络出版: 2013-01-14
农药残留动态的原位衰减全反射红外光谱表征
Characterization of Pesticide Residual Dynamics by In Situ Attenuated Total Reflection FTIR
农药 残留动态 敌敌畏 乙酰甲胺磷 原位衰减全反射红外光谱 Pesticide Residual dynamics Dichlorvos Orthene In situ attenuated total reflection FTIR
摘要
原位衰减全反射红外光谱用于农药残留动态研究。 通过对果蔬(西红柿)表面敌敌畏和乙酰甲胺磷两种农药的原位表征, 发现敌敌畏具有显著的挥发性, 喷淋20 min后降解达80%, 同时, 表征CO的1 734 cm-1吸收峰在20 min转为负峰, 结合3 073 cm-1吸收峰显著减弱, 1 277 cm-1吸收峰在减弱的同时发生了显著的红移(30 cm-1), 表明敌敌畏可能存在一定程度的水解; 而喷淋乙酰甲胺磷后120 min无明显变化, 表明乙酰甲胺磷相对稳定。
Abstract
In-situ attenuated total reflection FTIR (in situ ATR-FTIR) was used for the dynamic research on the residual of pesticide. The in-situ characterization of dichlorvos and orthene on the tomatoes’ surface shows that the dichlorvos has obvious volatility and its degradation amount is 80% 20 minutes after spraying. Meanwhile, the ATR-FTIR shows that the strong absorption peak of dichlorvos at 1 734 cm-1 turns to negative peaks and the absorption peaks at 3 073 cm-1 significantly abate. The absorption peaks at 1 277 cm-1 become weak and red shift (30 cm-1) shows that the dichlorvos may be hydrolyzed to some extent. While the absorption peaks of orthene show no change 120 minute after spraying. It shows that the orthene is relatively stable.
姚焱, 张平, 陈绮洁, 刘文峰, 曾娟, 谢建军, 孙莉丽, 王小兰. 农药残留动态的原位衰减全反射红外光谱表征[J]. 光谱学与光谱分析, 2012, 32(12): 3217. YAO Yan, ZHANG Ping, CHEN Qi-jie, LIU Wen-feng, ZENG Juan, XIE Jian-jun, SUN Li-li, WANG Xiao-lan. Characterization of Pesticide Residual Dynamics by In Situ Attenuated Total Reflection FTIR[J]. Spectroscopy and Spectral Analysis, 2012, 32(12): 3217.