一、2,4—D钠盐、萘乙酸钠盐配制称取2,4—D钠盐1克,放入烧杯中,加少量水,用玻璃棒搅拌溶解,然后加水至500毫升,即为2000ppm2,4—D等原液。使用时再加水稀释到所需浓度即可。二、萘乙酸的配制称取萘乙酸粉1克,滴入1%的酚酞指示剂1～2滴,然后再用5%氢氧化钠溶液搅拌,直至萘乙酸 A 2,4-D sodium salt, sodium naphthalene sodium salt Weigh 2 g of 2,4-D sodium salt, placed in a beaker, add a small amount of water, stirring with a glass rod to dissolve, and then add water to 500 ml, which is 2000ppm2,4-D and other liquid. When used, add water and dilute to the desired concentration. Second, the naphthalene acetic acid preparation Weigh 1 g of naphthalene acetic acid powder, dropping 1% phenolphthalein indicator 1 to 2 drops, and then 5% sodium hydroxide solution stirring until naphthalene acetic acid