pyrimethamine

The influential factors of synthesizing etrimfos were investigated by single factor experiments.

通过单因子实验考察了影响乙嘧硫磷收率的因素,得出了合成乙嘧硫磷的较佳工艺条件:以乙酸乙酯为溶剂、氢氧化钠为缚酸剂、4-二甲氨基吡啶为催化剂,其用量为原料2-乙基-4-乙氧基-6-羟基嘧啶的4%(摩尔比)、物料配比n(2-乙基-4-乙氧基-6-羟基嘧啶)∶n(氢氧化钠)∶n(O,O-二甲基硫化磷酰氯)=1∶1。

A method was introduced for the determination of ethirimol by HPLC with C18 column at UV 254 nm,the mobile phase was a mixture of 56% methanol,24% acetonitrile and 20% water(by vol).

采用高效液相色谱法,以C18柱为固定相,甲醇-乙腈-水(体积比为56:24:20)为流动相,用254nm紫外检测器定量测定乙嘧酚的含量。

A HPLC method was developed for the determination of bupirimate.

建立了高效液相色谱法测定乙嘧酚磺酸酯含量。