丁二酮肟直接比色法因Co~(2+)有干扰,不适用于测定高钴钢中低含量镍,而使用萃取光度法操作手续又较为繁琐。用离子交换技术分离镍、钴、铜、铁等元素是有效的方法。本文选用细粒度(20—50微米)的强碱性阴离子交换树脂YSGR_4 NCl,小型交换柱(φ6×100毫米),在盐酸介质中,减压下使Ni~(2+)与Co~(2+)、Cu~(2+)、Fe~(8+)等分离,丁二酮肟光度法测定Ni~(2+)。试验部份装置:以10毫升滴定管加工成上部为杯形,如图安装。强碱性阴离子交换树脂 Dimethylglyoxime direct colorimetric interference due to Co ~, not suitable for the determination of low cobalt content in high-cobalt steel, and the use of extraction photometric method is more complicated procedures. Ion exchange technology for separation of nickel, cobalt, copper, iron and other elements is an effective method. In this paper, the strong basic anion exchange resin YSGR_4 NCl with fine particle size (20-50 μm) was used to make Ni 2+ and Co 2 (2 × 100 mm) +), Cu ~ (2 +), Fe ~ (8+), and the spectrophotometric determination of Ni ~ (2+) with dimethylglyoxime. Test part of the device: 10 ml buret processed into the upper cup, installed as shown. Strongly basic anion exchange resin