CAJ | 학술논문

研究了在CTMAB-OP微乳溶液存在下,5-(对羧基苯偶氮)-8-羟基喹哪啶(5-CPAHQD)与汞(Ⅱ)发生显色反应的条件,建立了测定微量汞(Ⅱ)新的高灵敏度分光光度法.实验结果表明,在醋酸-醋酸钠介质中,5-(对羧基苯偶氮)-8-羟基喹哪啶与汞(Ⅱ)发生灵敏的显色反应,生成络合比为2:1的橙红色络合物.络合物的最大吸收峰位于508 nm,表观摩尔吸收系数为3.5×10~(-5)L·mol~(-1)·cm~(-1),在10 mL,溶液中汞(Ⅱ)量在0.01～1.2μg之间符合比耳定律,检出限为0.3 mg/L,并且该显色反应具有较强的抗干扰能力,用于水、铅锌矿样品中微量汞(Ⅱ)的测定,结果与原子吸收光谱法相一致,方法的回收率在97%～104%之间,其相对标准偏差(n=6)≤4.5%.
연구료재CTMAB-OP미유용액존재하,5-(대최기분우담)-8-간기규나정(5-CPAHQD)여홍(Ⅱ)발생현색반응적조건,건립료측정미량홍(Ⅱ)신적고령민도분광광도법.실험결과표명,재작산-작산납개질중,5-(대최기분우담)-8-간기규나정여홍(Ⅱ)발생령민적현색반응,생성락합비위2:1적등홍색락합물.락합물적최대흡수봉위우508 nm,표관마이흡수계수위3.5×10~(-5)L·mol~(-1)·cm~(-1),재10 mL,용액중홍(Ⅱ)량재0.01～1.2μg지간부합비이정률,검출한위0.3 mg/L,병차해현색반응구유교강적항간우능력,용우수、연자광양품중미량홍(Ⅱ)적측정,결과여원자흡수광보법상일치,방법적회수솔재97%～104%지간,기상대표준편차(n=6)≤4.5%.
A novel spectrophotometric determination method of trace mercury (ID with high sensitivity was established based on the color reaction of chromogenic agent 5-( p-carboxylphenylazo )-8-hydroxyquinaldine (5-CPAHQD) with Hg (Ⅱ) in the presence of CTMAB-OP micromulsion.The results showed that in HAC-NaAC medium, a red stable complex with molar ratio of 2 : 1 was formed by the reaction between 5-CPAHQD and Hg (H).The maximum absorption peak of this complex was at 508 nm with the apparent molar absorptivity of 3.5 × 10~5 L · mol~(-1)·cm~(-1).Beer's law was obeyed for 0.01 -1.2 μg of Hg (II) in 10 mL of solution.The detection limit was 0.3 mg/L.The color reaction system had strong interference resistance,which enabled it could be applied to the determination of trace Hg (H) in water and lead-zinc ore samples.The determination results were in consistent with those obtained by AAS method.The recovery of this method was in the range of 97 % -104 % and the RSD (n=6) was ≤ 4.5 %.