Hirata S, Hashimoto Y, Aihara M, Mallika G V
Chugoku National Industrial Research Institute, 2-2-2 Hiro-suehiro Kure, 737-01, Hiroshima, Japan.
Anal Bioanal Chem. 1996 Jun;355(5-6):676-9. doi: 10.1007/s0021663550676.
A flow-injection method for the determination of dissolved cobalt(II) in sea water has been studied based on a combination of column preconcentration using 8-quinolinol immobilized on silica gel, fluoride containing metal alkoxide glass (8HQ-MAF) and chemiluminescence detection with a gallic acid-hydrogen peroxide system. Co(II) is selectively recovered from an acidified sample with 8-quinolinol immobilized on silica gel. After elution with dilute hydrochloric acid the resultant eluent is mixed with the reagent solutions, heated to 60 ( degrees )C and then introduced into the CL cell. The analysis time including the 2-min sample load was 8 min per sea water sample with a corresponding detection limit of 0.62 ng l(-1) (3sigma). The average standard deviation calculated for 10 replicate measurements of artificial sea water samples with a concentration of 10 ng l(-1) cobalt was +/-2.1%. The method has been tested with the standard reference sea waters NASS and CASS.
基于硅胶固定化8-喹啉醇柱预富集、含氟金属醇盐玻璃（8HQ-MAF）以及没食子酸-过氧化氢体系化学发光检测相结合的方法，对海水中溶解态钴（II）的流动注射测定方法进行了研究。钴（II）用硅胶固定化的8-喹啉醇从酸化样品中选择性回收。用稀盐酸洗脱后，将所得洗脱液与试剂溶液混合，加热至60℃，然后引入化学发光检测池。包括2分钟进样时间在内，每个海水样品的分析时间为8分钟，相应的检测限为0.62 ng l⁻¹（3σ）。对浓度为10 ng l⁻¹钴的人工海水样品进行10次重复测量计算得到的平均标准偏差为±2.1%。该方法已用标准参考海水NASS和CASS进行了测试。
