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摘要：對水中總氰化物的預處理方法進行了比較研究。通過方法檢出限、準確度、加標回收率和精密度的對比，結果表明，傳統(tǒng)蒸餾法和STEHDB-106-3RW智能一體化蒸餾儀的檢出限均為0.004mg/L，都能滿足環(huán)境保護部相關標準的要求。兩種方法加標回收率分別為92%、96%，精密度分別為6.2%、3.3%。相比傳統(tǒng)蒸餾法，STEHDB-106-3RW智能一體化蒸餾儀準確度和精密度相對較高，且能節(jié)省大量時間和人力，適合大批量水中總氰化物的分析測定。
關鍵字：總氰化物；預處理；自動蒸餾儀；對比分析

Comparison and Analysis of Different Pretreatment Methods on Total Cyanide in Water
Zheng Yang
（Guangdong Enviromental Monitoring Center, Guangdong 510310,China）

Abstract: This article compared and analyzed different?pretreatment methods on total cyanide in water through results of the detection limit, accuracy, the recovery of standard addition and precision. The result showed that the detection limit of the pretreatment of conventional distillation and STEHDB-106-3RW distillation was 0.004mg/L. The recovery of standard addition of two pretreatment methods was 92%, 96%, 96%. And the precision was 6.2%, 3.3%. Compared with the conventional distillation, the accuracy and precision of automatic distillations was higher. It took less time and less human resources by using automatic distillations. It is suitable for measurement of large quantities of total cyanide in water.
Key words: total cyanide; pretreatment; automatic distillation; comparison and analysis