摘要
阐述了对水体中ＮＯ－２采用高效离子色谱分离、紫外光度检测的新方法。即在离子色谱分离柱对水体中主要阴离子进行分离的基础上，利用ＮＯ－２（包括ＮＯ－３）在紫外光区有吸收，而Ｃｌ－、ＳＯ２－４等离子在此区间无吸收的原理，有效地消除了在使用电导法检测ＮＯ－２时，由于浓度较高的Ｃｌ－和ＮＯ－２因树脂亲和力接近（保留时间相近）而产生对ＮＯ－２测定的干扰，使离子色谱法检测ＮＯ－２的适用领域大为拓宽。加标回收率为９７％～１０２％，方法检出限（３δ）为０．０００８μｇ／ｍｌ，相对标准偏差为１．１８％。
A new method to determine NO-2 in water solution by high effective ion chromatograph separation & ultraviolet light is described.By separating the main anion in water solution by ion chromatographic separation colum,and using the principle that NO-2(including NO-3) has absorbtion while Cl- & SO2-4 ion have no absorbtion at the ultraviolet area,the interference due to the close resin affinities(almost the same retaining time) of Cl- & NO-2 with higher concentration on the NO-2 determination is eliminated with good effect,when determining NO-2 by conductometry,so that the suitable area of determining NO-2 by ion chromatograph is largely extended.The method is provided with a standard recovery of 97%～102%,a detection limit(3δ) of 0.0008 μg/ml,a relative standard deviation of 1.18% and a good linear in the concentration range from 10 μg/L￣100 mg/L.
出处
《宝钢技术》
CAS
1998年第4期28-32,共5页
Baosteel Technology
