通过添加抗氧化剂四氢呋喃和抗坏血酸,对传统的二硫代氨基甲酸酯类化合物检测方法——1,2-苯二硫酚衍生-高效液相色谱法进行了优化和改进,并用4种常用二硫代氨基甲酸酯类杀菌剂[70%代森锰锌可湿性粉剂(WP)、68%精甲霜锰锌水分散粒剂(WG)...通过添加抗氧化剂四氢呋喃和抗坏血酸,对传统的二硫代氨基甲酸酯类化合物检测方法——1,2-苯二硫酚衍生-高效液相色谱法进行了优化和改进,并用4种常用二硫代氨基甲酸酯类杀菌剂[70%代森锰锌可湿性粉剂(WP)、68%精甲霜锰锌水分散粒剂(WG)、68%霜脲锰锌WG和55%唑醚代森联WG]对该方法进行了验证。结果表明:当1,2-苯二硫酚浓度为12 mmol/L、代森锰锌用乙二胺四乙酸二钠(EDTA,p H 9.3)及代森联用二乙基三胺五乙酸(DTPA,p H 10.0)解络合、且同时添加体积分数为4%的四氢呋喃和40 mg/L的抗坏血酸时衍生化条件最优。除55%唑醚代森联WG外,其他3种商品杀菌剂待测液在衍生化后48 h内均保持稳定且相对标准偏差<5%,满足测试要求。该方法操作简便快捷,检出目标物明确,不受二硫代氨基甲酸酯类杀菌剂常见代谢物乙撑硫脲及二硫化碳的影响,检测效率高,适用于该类杀菌剂的批量测试。展开更多
2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the ...2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the spectral properties of cyclized compounds were researched.All the structures of cyclized products were confirmed by elemental analysis,IR,1H NMR and MS.展开更多
文摘通过添加抗氧化剂四氢呋喃和抗坏血酸,对传统的二硫代氨基甲酸酯类化合物检测方法——1,2-苯二硫酚衍生-高效液相色谱法进行了优化和改进,并用4种常用二硫代氨基甲酸酯类杀菌剂[70%代森锰锌可湿性粉剂(WP)、68%精甲霜锰锌水分散粒剂(WG)、68%霜脲锰锌WG和55%唑醚代森联WG]对该方法进行了验证。结果表明:当1,2-苯二硫酚浓度为12 mmol/L、代森锰锌用乙二胺四乙酸二钠(EDTA,p H 9.3)及代森联用二乙基三胺五乙酸(DTPA,p H 10.0)解络合、且同时添加体积分数为4%的四氢呋喃和40 mg/L的抗坏血酸时衍生化条件最优。除55%唑醚代森联WG外,其他3种商品杀菌剂待测液在衍生化后48 h内均保持稳定且相对标准偏差<5%,满足测试要求。该方法操作简便快捷,检出目标物明确,不受二硫代氨基甲酸酯类杀菌剂常见代谢物乙撑硫脲及二硫化碳的影响,检测效率高,适用于该类杀菌剂的批量测试。
文摘2-Thioxo-3-alkyl-5-phenylmethylidene-4-imidazolidinones 5 were synthesized via tandem aza-Wittig reaction with three component of vinyliminophosphorane 3,alkyl isocyanates and Na2S/HOAc.The reaction condition and the spectral properties of cyclized compounds were researched.All the structures of cyclized products were confirmed by elemental analysis,IR,1H NMR and MS.
