CAJ | 학술논문

提出了一种采用毛细管离子色谱法同时测定火电机组水汽中痕量无机阴离子(F－,Cl－, SO2－4,Br－,NO－3,NO－2,PO3－4)和小分子有机酸根(CH 3 COO－,HCOO－,C2 O2－4)的方法：直接进样10μL；采用 IonPac AS18(250 mm ×0．4 mm)毛细管离子色谱分析柱；流速为0．010 mL/min的 KOH 淋洗液进行梯度淋洗.采用该方法对上述10种痕量阴离子进行测定.结果表明：采用毛细管离子色谱法检测的10种离子标准曲线线性关系良好,相关系数均大于99．9％,以信噪比 S/N ＝3计算,所测离子检出限在0．04~0．80μg/L 之间；连续运行96 h后相对标准偏差仍在0．03~5．81％,加标回收率81％~116％.检测结果准确可靠,该方法适用于火电机组水汽检测.
제출료일충채용모세관리자색보법동시측정화전궤조수기중흔량무궤음리자(F－,Cl－, SO2－4,Br－,NO－3,NO－2,PO3－4)화소분자유궤산근(CH 3 COO－,HCOO－,C2 O2－4)적방법：직접진양10μL；채용 IonPac AS18(250 mm ×0．4 mm)모세관리자색보분석주；류속위0．010 mL/min적 KOH 림세액진행제도림세.채용해방법대상술10충흔량음리자진행측정.결과표명：채용모세관리자색보법검측적10충리자표준곡선선성관계량호,상관계수균대우99．9％,이신조비 S/N ＝3계산,소측리자검출한재0．04~0．80μg/L 지간；련속운행96 h후상대표준편차잉재0．03~5．81％,가표회수솔81％~116％.검측결과준학가고,해방법괄용우화전궤조수기검측.
A capillary ion chromatography method was proposed,which can detect trace inorganic anions (F- ,Cl- ,SO2 -4 ,Br- ,NO-3 ,NO-2 ,PO3 -4 )and low-molecular-weight organic acids (CH 3 COO- ,HCOO- , C2 O2 -4 )in water and steam from boilers in power plants.The separation was achieved on IonPac AS18 (250 mm×0.4 mm)capillary anions analytical column with optimized KOH gradient elution and 10 μL in-jection at 0.010 mL/min,and then each component's concentration was detected by suppressed conductivi-ty.The results show that,under the chosen condition,the linear correlation coefficients of the above 10 ani-ons were greater than 99.9%,the detection of limit with signal-to-noise ratio of 3 were between 0.04 μg/L and 0.8 μg/L.After running for 96 hours,the relative standard deviations (RSDs)were still between 0.03% and 5.81%,and the average recoveries ranged from 81% to 1 1 6%,indicating this method has better repeatability and accuracy.This detection method can be applied in numbers determination of trace anions and low-molecular-weight organic acids in water and steam of boilers in power plants.