CAJ | 학술논문

建立了一种采用离子色谱测定外墙涂料中六价铬的分析方法。采用电导检测器检测,采用RP柱和H柱去除有机物和金属阳离子的干扰。通过碳酸盐干扰的去除、流动相浓度的选择、进样体积的选择优化了分析条件,确定流动相为40mmol·L-1 NaOH溶液等度淋洗,流速1．0mL·min-1；进样体积为500μL；分析时间为10min。该方法标准曲线线性回归方程为 A=0．1679C+0．0607,相关系数为0．9995,该方法检出限为1mg· kg-1,与标准方法的相对偏差小于5%,回收率为80%~90%。该方法可以达到标准方法的分析要求,而且可以解决经典的二苯碳酰二肼分光光度法对有颜色溶液或者混浊溶液无法测定的问题。
건립료일충채용리자색보측정외장도료중륙개락적분석방법。채용전도검측기검측,채용RP주화H주거제유궤물화금속양리자적간우。통과탄산염간우적거제、류동상농도적선택、진양체적적선택우화료분석조건,학정류동상위40mmol·L-1 NaOH용액등도림세,류속1．0mL·min-1；진양체적위500μL；분석시간위10min。해방법표준곡선선성회귀방정위 A=0．1679C+0．0607,상관계수위0．9995,해방법검출한위1mg· kg-1,여표준방법적상대편차소우5%,회수솔위80%~90%。해방법가이체도표준방법적분석요구,이차가이해결경전적이분탄선이정분광광도법대유안색용액혹자혼탁용액무법측정적문제。
A method based on ion chromatography was developed for determination of hexavalent chromium ( Cr (Ⅵ) ) in exterior wall coatings. The analysis was performed by electric conductivity detector. The interference of organics and metal cations was re-moved by using RP column and H column. The experimental parameters of removing carbonate interference,concentration of mobile phase and injection volume were investigated. The target compounds were separated with 40mmol·L-1 NaOH solution as mobile phase at a flow rate of 1. 0mL·min-1 and the injection volume was 500μL. A single sample analysis cycle took only 10 min. Under the optimized conditions,the method showed good linear relationship(r=0. 9995). The LOD was 1mg·kg-1,the recoveries were 80% ~90%and the relativedeviation was less than 10%compared with the standard method. The proposed method can meet the re-quirements of the standard method and can also solve the problems of colored or turbid solution interference.