CAJ | 학술논문

建立一种海水中的亚硝酸根离子测定方法。采用配备紫外可见分光光度检测器的离子色谱仪，选用高容量、强亲水性的AS11阴离子分析柱，以40 mmol／L NaOH水溶液为流动相，流量为1.0 mL／min，样品经0.45μm滤膜过滤后直接进样。选定210 nm的波长进行检测，海水中的氯离子对检测无干扰。亚硝酸根离子在0.05～200 mg／L内呈现良好的线性关系，线性系数为0.9995，方法检出限为0.01 mg／L。测定结果的相对标准偏差为0.51%(n=11)，样品加标回收率为99.5%。该方法操作简便，具有良好的精密度与准确度，能够实现海水中亚硝酸根离子的快速检测。
건립일충해수중적아초산근리자측정방법。채용배비자외가견분광광도검측기적리자색보의，선용고용량、강친수성적AS11음리자분석주，이40 mmol／L NaOH수용액위류동상，류량위1.0 mL／min，양품경0.45μm려막과려후직접진양。선정210 nm적파장진행검측，해수중적록리자대검측무간우。아초산근리자재0.05～200 mg／L내정현량호적선성관계，선성계수위0.9995，방법검출한위0.01 mg／L。측정결과적상대표준편차위0.51%(n=11)，양품가표회수솔위99.5%。해방법조작간편，구유량호적정밀도여준학도，능구실현해수중아초산근리자적쾌속검측。
The method was established for determination of nitrite in seawater by ion chromatography with UV–VIS detector. The high capacity and strong hydrophilicity AS11 anion analytical column was used,the mobile phase was 40 mmol/L NaOH solution at theflow rate of 1.0 mL/min,and the sample wasfiltered by 0.45μm membrane. 210 nm was selected for the detecting wavelength without interference of large amounts of chloride ions in seawater. The linear range of the calibration curve was 0.05–200 mg/L with the correlation coefficient of 0.999 5, the detection limit was 0.01 mg/L. The relative standard deviation of determination results was 0.51%(n=11) and the recovery was 99.5%. The result showed that the method was simple,reliable and suitable for quikcly determining nitrite in seawater.