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采用巯基棉分离富集痕量铜，用3mol．L-1HCl作洗脱剂洗脱富集在巯基棉上的铜，结合离子选择电权法建立了水饮料中痕量铜的离子选择电极分析方法．该法简单、分析灵敏度高，选择性好，检出限量8．30×10－8mol·L－1铜。相对标准偏差为3．8％（n＝7；Cs＝7．2×10－7mol．L－1Cu2＋）．
The use of mercaptan cotton enrichment trace of copper, with 3mol. L-1HCl was used as eluent to elute the copper enriched in thiol cotton, and the ion-selective electrode method for the determination of trace copper in water drinks was established by ion-selective electro- The method is simple, high sensitivity, good selectivity, detection limit 8.30 × 10-8mol·L-1 copper. The relative standard deviation was 3.8% (n = 7; Cs = 7.2 × 10-7mol.L-1Cu2 +).