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以 1 ,1 0 -二氮菲 (1 ,1 0 -phen)为配合剂 ,乙醇为洗脱液 ,在 C1 8柱上将流动注射固相萃取预富集 -原子吸收光谱联用测定痕量 Fe( )和总铁 .Fe( )的含量可通过抗坏血酸还原后用差示法测得 .本法灵敏度高 ,选择性好 ,能在线分离干扰富集 Fe( ) ,采样速度 80次 / h,富集倍数 1 9倍 ,检测下限为 3μg/ L,相对标准偏差 1 .1 % (n=1 0 ) ,可用于测定水样中痕量 Fe( )和 Fe( ) ,回收率为 94 %～ 1 0 5%
Phenol was eluted with 1,10-phenanthroline (1,10-phen) and ethanol as the eluent. Flow injection solid-phase extraction (FAI-FAAS) The content of Fe () and total iron (Fe) can be determined by differential method after reduction with ascorbic acid.The method has high sensitivity and good selectivity and can separate and interfere with Fe (superscript + Enrichment multiple of 19 times, the detection limit of 3μg / L, the relative standard deviation of 1.1% (n = 10), can be used for the determination of trace Fe () and Fe () in water samples, the recovery was 94% 1 0 5%