Studies On The Residue Analysis Method And Residue Dynamics Of HNPC-A9908 Which Is A New Compound Of Pyrethroids

HNPC-A9908, which is a new compound of non-ester oxime aether pyrethroids and possesses characteristic of considerably fine insecticide , has been manufactured and developed by Hunan Chemical Research Institute in recent years. Pure sample is achromatous solid. Its melting point is 27.3-27.7 C. The compound is not soluble for water, but it is easily soluble for a majority of organic solvent. HNPC-A9908 not only has high efficiency and low toxicity and broad spectrum, but also is somewhat poisonous to mammal. Moreover its synthesis is relatively simple. 10%HNPC-A9908 emulsion is a kind of fine pesticide that prevents and cures cabbage caterpillar in cruciferae vegetables. In addition, it does no harm to them. In order to develop and apply for register, the paper was researched initially by HPLC with UV on the residue of the compound in cabbage being its register representative crop and soil. The contents and results are as follows:1 This article discussed about the residue analysis means of HNPC-A9908 in cabbage and soil. HPLC condition is next:Chromatography: LC-10ATColumn: Kromasil C18 Column(250+4.6mm(id),5m)The detector: UVFlowing velocity: 1.1mL/minMobile phase: carbinol:water(9:1,v/v)Wavelength: 220nmColumn temperature: 35 CAmount: 20LRettime: 14.50minExternal standard area method was to quantify. Minimal determination quantity (MDQ) was 6.5+10-10g, while minimal determination concentration (MDC) in cabbage and soil was 0.0162mg/kg without exception. When concentration ofHNPC-A9908 ranged from 0.1294mg/L to 6.470mg/L, it had fine linear relation, when the addictive amount was 0.0647mg/kg,0.6470mg/kg,1.2940mg/kg, the average recovery of HNPC-A9908 in cabbage and soil was 88.15%-99.86% and 83.45%-93.07%, separately. At the same time, the coefficient of variation of this method was 0.84%-10.15%,5.82%-6.57% respectively. Therefore, The sensitivity and accuracy and precision of the means accorded with demand of the detection skill of pesticide residue.2 The thesis considered tentatively about the dissipation dynamics of 10%HNPC-A9908 emulsion in cabbage and soil. Its result showed that the dissipation dynamics of pesticide accorded with C = C0E-kt in cabbage as well as in soil. Moreover it had high correlation. Under field environment, the half-lives was 2.66 days and 6.94 days, separately.3 The paper reported the final residue experiment of HNPC-A9908 in cabbage and soil. The outcome indicated that the residue of HNPC-A9908 was directly related to the applying concentration and degree. Namely, the residue increased in pace of them. After HNPC-A9908 was used in cabbage, its residue was rather low. For this reason, the edible cabbage was quite safe. Besides, the possibility of pollution of soil was pindling.