亚硝酸钠含量的快速测定

Rapid Determination of NaNO_2

分析了用 N-(1 -萘基 )乙二胺光度法快速测定 N-甲基吡咯烷酮 (NMP)中的亚硝酸钠含量的影响因素确定入射波波长为 540 nm,显色剂的用量为 1 .0 ml,显色反应时的 p H值不大于 1 .95。研究表明 ,一定量的 NMP和 Na NO3对显色反应影响不大 ;而腐蚀产物对测定产生较大干扰 ,可用氢氧化铝悬浮液进行样品的预处理 。

The influencing factor of NaCO 2 content is analyzed by using N(1 Naphthy 1) ethylenediamine photometric means(NMP) The length of incidence wave of 540 nm is measured,in which chromogenic solvent is 1 0 ml, pH of chromogenic reaction is more than 1 95 when the chromogenic reaction occurs Study shows that some NMP and NaNO 3 in the chromogenic system have little influence to the chromogenic reaction But corrosion products have great influence to the determination, a pretreatment is conducted on sample with aluminium hydroxid suspension,and error is less in sample testing after the treatment