Study on Determination of Six Transition Metal Ions in Biological Samples by SPE and RP-HPLC
作者:Ya-Ling Yang、Ming-Ming Miao、Qiang Lin、Guang-Yu Yang
DOI:10.1002/jccs.200400004
日期:2004.2
ions (iron, cobalt, nickel, copper, zinc and manganese) in biological samples. The samples were digested by microwave digestion. The iron, cobalt, nickel, copper, zinc and manganese ions in the digested samples can react with 2-(2-quinolinylazo)-5-diethylaminophenol (QADEAP) to form colored chelates in pH 4.0 acetic acid-sodium acetic buffer solutions and cetyl trimethylammonium bromide (CTMAB) medium
本文报道了利用固相萃取和反相高效液相色谱 (RP-HPLC) 测定生物样品中六种过渡金属离子(铁、钴、镍、铜、锌和锰)的方法。通过微波消解对样品进行消解。消解样品中的铁、钴、镍、铜、锌和锰离子可与 2-(2-喹啉偶氮)-5-二乙氨基苯酚 (QADEAP) 在 pH 4.0 的醋酸-醋酸钠缓冲溶液和鲸蜡基中形成有色螯合物三甲基溴化铵 (CTMAB) 培养基。这些螯合物通过用C 1 8 柱进行固相萃取而富集。然后在 Waters Nova-Pak-C 1 8 柱 (3.9 x 150 mm, 5 μm) 上通过甲醇(含有 0.5% 的乙酸和 0.1% 的 CTMAB)和 0.05 mol/L pH 4 梯度洗脱分离螯合物. 0 乙酸-乙酸钠缓冲溶液(含 0.1% CTMAB)作为流动相,流速为 0.5 mL/min。铁、钴、镍、铜、锌、锰的检测限分别为3 ng/L、4 ng/L、2 ng/L、4