干旱环境监测
榦旱環境鑑測
간한배경감측
ARID ENVIRONMENTAL MONITORING
2012年
1期
11-13
,共3页
游离性余氯%测定%优化
遊離性餘氯%測定%優化
유리성여록%측정%우화
free residual chlorine%determination%optimization
系统研究了反应时间、水温、显色剂的用量及pH对游离性余氯测定的影响,优化选择最佳测定条件为控制水样pH〈8,水温25℃,显色剂用量2.5 ml,加入显色剂后立即比色测定游离性余氯。在此条件下,测定3种生活饮用水游离性余氯,回收率为96.7%~99.8%,测定结果与《生活饮用水标准检验法》（GB 5750-85）中37.3滴定法颇为一致。
繫統研究瞭反應時間、水溫、顯色劑的用量及pH對遊離性餘氯測定的影響,優化選擇最佳測定條件為控製水樣pH〈8,水溫25℃,顯色劑用量2.5 ml,加入顯色劑後立即比色測定遊離性餘氯。在此條件下,測定3種生活飲用水遊離性餘氯,迴收率為96.7%~99.8%,測定結果與《生活飲用水標準檢驗法》（GB 5750-85）中37.3滴定法頗為一緻。
계통연구료반응시간、수온、현색제적용량급pH대유리성여록측정적영향,우화선택최가측정조건위공제수양pH〈8,수온25℃,현색제용량2.5 ml,가입현색제후립즉비색측정유리성여록。재차조건하,측정3충생활음용수유리성여록,회수솔위96.7%~99.8%,측정결과여《생활음용수표준검험법》（GB 5750-85）중37.3적정법파위일치。
Studied response time,water temperature,reagent dosage and pH on the determination of free residual chlorine,optimized to select the optimum conditions for the control of the water pH8,25 ℃ water temperature,color reagent dosage of 2.5 ml,the colorimetric determined to free residual chlorine after adding the color reagent immediately.In this condition,the determination of the three kinds of free residual chlorine in drinking water,the recovery was 96.7%~99.8%,determination results with the drinking water standard test method（GB 5750-85） 37.3 titration method was quite consistent.
