申请人:——
公开号:US04918024A1
公开(公告)日:1990-04-17
The present invention is a method for determination of dicyanodiamide in a plant matrix, i.e. in a plant or a part of a plant. It involves a series of steps including extracting any dicyanodiamide from the plant matrix as well as purifying the dicyanodiamide obtained of interfering substances. Next, the dicyanodiamide obtained is reacted with 3-hydroxy-2-butanone in a non-aqueous, alcoholic hydrochloric acid medium to form 2-guanidino-4,5-dimethyloxazole, and then any 2-guanidino-4,5-dimthyloxazole formed is isolated using liquid-liquid extraction. Finally, any isolated 2-guanidino-4,5-dimethyloxazole is purified by reverse phase high pressure liquid chromatography (HPLC) and the amount of 2-guanidino-4,5-dimethyloxazole is determined spectrophotometrically at a wavelength of 260 nm.
本发明涉及一种在植物基质中测定二氰基脲的方法,即在植物或植物的一部分中测定二氰基脲。它包括一系列步骤,包括从植物基质中提取任何二氰基脲以及纯化所得的二氰基脲中的干扰物质。接下来,在非水的酒精盐酸介质中,将所得的二氰基脲与3-羟基-2-丁酮反应,形成2-鸟氨酸基-4,5-二甲氧噁唑,然后使用液-液萃取分离任何形成的2-鸟氨酸基-4,5-二甲氧噁唑。最后,通过反相高压液相色谱(HPLC)纯化任何分离的2-鸟氨酸基-4,5-二甲氧噁唑,并在260 nm波长下通过光谱法确定2-鸟氨酸基-4,5-二甲氧噁唑的量。