涉水产品浸泡液中铬(六价)测定方法的探讨  

Determination of six valency chromium in soaked liquid of products involved drinking water

作　　者：刘丽菁[1] 邱文倩[1] 于凌志[1] 吕华东[1] 

机构地区：[1]福建省疾病预防控制中心,福州350001

出　　处：《中国卫生检验杂志》2008年第9期1772-1773,共2页Chinese Journal of Health Laboratory Technology

摘　　要：目的：探讨涉水产品浸泡液中铬（六价）的测定方法,提高分析结果的准确性。方法：在酸性条件下,用尿素（200 g/L）消除浸泡液中氯的干扰,用二苯碳酰二肼分光光度法测定。结果：铬（六价）在0-50μg/L范围内线性良好,相关系数0.9994,最低检测质量浓度为0.004 mg/L,回收率为93.3%-98.2%;重复测定某一涉水产品浸泡液中铬（六价）8次,s=0.5012,相对标准偏差为3.39%。结论：可适用于涉水产品浸泡液中铬（六价）的测定。Objective：To develop a method for determination of six valency chromium in soaked liquid of products involved drinking water,and advance the veracity of the results.Methods：Urea（200 g/L） could avoid the effect of chlorine in acidic condition,diphenylcarbazide spectrophotometry was applied.Results：This method had good linear relatity in the range of 0-50 μg/L,the correlation coefficient was 0.9994,the detection limit was 0.004 mg/L,the standard deviation was 0.5012,relative standard deviation was 3.39%.The recovery rate was 93.3%-98.2%.Conclusion：The method is available to determine six valency chromium in soaked liquid of products involved drinking water.

关 键 词：分光光度法 涉水产品 铬(六价) 尿素 

分 类 号：O657.32[理学—分析化学]