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双氰胺与碳铵混合肥料中双氰胺的定量分析,由于碳铵中氮元素的存在,无法沿用国内普遍采用的定氮法测定混合肥料中双氰胺含量.据国外报道,双氰胺的定量可用容量法,重量法,极谱法,电位滴定法,比色法,红外分光光度法和紫外分光光度法等,结合样品实际情况及本所条件,仅对碳铵中双氰胺(0.5%～2.0%)的紫外吸收光谱定量分析作一些探讨.经过近半年的工作,证明用紫外分光光度法,在216nm处进行碳铵中双氰胺的定量测定,操作简便迅速,易于排除干扰,准确度及精度均达到工业分析要求.
Dicyandiamide and ammonium bicarbonate compost dicyandiamide quantitative analysis, due to the presence of ammonium bicarbonate in the ammonium nitrogen can not be used in China to determine the determination of dicyandiamide compound fertilizer dicyandiamide content.According to foreign reports, dicyandiamide Of the quantitative available volume method, gravimetric method, polarography, potentiometric titration, colorimetry, infrared spectrophotometry and UV spectrophotometry, combined with the actual situation of the sample and the conditions of this, only the ammonium bicarbonate in the dicyandiamide ( 0.5% ~ 2.0%) UV absorption spectrometry quantitative analysis for some discussion.After nearly six months of work, the use of UV spectrophotometry at 216nm at ammonium bicarbonate quantitative determination of dicyandiamide, easy and quick to operate, easy to rule out interference , Accuracy and precision have reached the industrial analysis requirements.