钾、钠、氯离子是人体组织内必不可少的组成部份,确定其含量是临床生化检测的重要内容。据国外统计,医院临床生化检验中,钾、钠、氯的测定约占20%。过去,化验室都用火焰光度计测定钾、钠含量,用化学滴定法手工测定氯含量。七十年代,国外开始离子选择性电极的医用化研究。使用离子选择性电极进行测定,具有快速、灵敏、微 Potassium, sodium and chloride are essential components of human tissues. Determining their content is an important part of clinical biochemical tests. According to foreign statistics, the hospital clinical biochemical tests, potassium, sodium, chlorine determination of about 20%. In the past, laboratories have used the flame photometer to measure potassium and sodium levels, and the chemical determination of chlorine content by hand. In the seventies, foreign countries started the medical research of ion selective electrodes. Using ion-selective electrode for determination, with fast, sensitive, micro