离子选择电极法测定生活饮用水中氨氮方法的研究
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摘要
目的研究一种可行的检测方法,快速准确地检测生活饮用水中氨氮的含量。方法通过气敏氨离子复合电极,利用电动势与离子活度负对数值的关系,使用Excel表格进行数据处理,不需建立标准曲线,直接求出水样中氨氮浓度。结果国标纳氏试剂分光光度法线性范围为0. 00～2. 00 mg/L,电极法的线性范围为0. 05～1 400. 00 mg/L,国标法相对标准偏差小于6. 0%,电极法相对标准偏差小于3. 0%,国标法对色度、浑浊度较高和干扰物质较多的水样需经过蒸馏或混凝沉淀等预处理,而电极法不需要。结论电极法与国标法第一法纳氏试剂分光光度法比较,操作简便、线性范围宽、相对偏差小、分析时间短、准确度高。
Objective To study a feasible detection method to quickly and accurately detect the content of ammonia nitrogen in drinking water. Methods Using the gas-sensitive ammonia ion composite electrode,the relationship between the electromotive force and the negative logarithm of the ion activity was used,and the Excel table was used for data processing. The ammonia nitrogen concentration in the water sample was directly determined without establishing a standard curve. Results The linear range of the national standard Nessler's reagent spectrophotometry is 0. 00 ～ 2. 00 mg/L,the linear range of the electrode method is 0. 05 ～ 1 400. 00 mg/L,the relative standard deviation of the national standard method is less than 6. 0%,and the relative standard deviation of the electrode method. Less than 3. 0%. The national standard method requires water samples with higher chroma,turbidity and more interfering substances to be pretreated by distillation or coagulation and sedimentation,and the electrode method is not required. Conclusion The electrode method is simpler than the first method of the Nessler's reagent spectrophotometry. The method is simple,the linear range is wide,the relative deviation is small,the analysis time is short,and the accuracy is high.
Objective To study a feasible detection method to quickly and accurately detect the content of ammonia nitrogen in drinking water. Methods Using the gas-sensitive ammonia ion composite electrode,the relationship between the electromotive force and the negative logarithm of the ion activity was used,and the Excel table was used for data processing. The ammonia nitrogen concentration in the water sample was directly determined without establishing a standard curve. Results The linear range of the national standard Nessler's reagent spectrophotometry is 0. 00 ～ 2. 00 mg/L,the linear range of the electrode method is 0. 05 ～ 1 400. 00 mg/L,the relative standard deviation of the national standard method is less than 6. 0%,and the relative standard deviation of the electrode method. Less than 3. 0%. The national standard method requires water samples with higher chroma,turbidity and more interfering substances to be pretreated by distillation or coagulation and sedimentation,and the electrode method is not required. Conclusion The electrode method is simpler than the first method of the Nessler's reagent spectrophotometry. The method is simple,the linear range is wide,the relative deviation is small,the analysis time is short,and the accuracy is high.
引文
[1]刘金秀.纳氏试剂分光光度法分析工业废不中氨氮的影响因素探讨[J].当代化工研究,2016,16(10):65-66.
[2]郭华,王军林,张小燕,等.沸石负载高锰酸钾去除低浓度氨氮[J].环境工程学报,2015,9(9):4321-4324.
[3]王朝阳,李捍东,王平.河道底泥中氨氮的微生物降解分析[J].四川环境,2008,27(2):39-42.
[4]卫生部. GB/T 5750. 5-2006生活饮用水卫生标准检验方法[S].北京:中国标准出版社,2007.
[5]闫祥.纳氏试剂比色法测定氨氮的影响因素分析[J].广东化工,2015,23(42):186-187.
[6]黄亿,张绍斌.纳氏试剂分光光度法测定水中氨氮的影响因素浅析[J].四川环境,2016,35(3):23-27.
[7]马淑勍,梁滨.利用自动分析仪测定水中氨氮的方法研究[J].山东化工,2015,44(4):76-78.
[8]中华人民共和国国家质量监督检验检疫总局. GB/T 6628-2008分析实验室用水规格和试验方法[S].北京:中国标准出版社,2008.
[9]刘志新,赵庆武.改良测定生活饮用水中氰化物的测定方法[J].医学动物防制,2016,32(5):586-587.
[10]卫生部. GB/T 5750. 3-2006生活饮用水卫生标准检验方法[S].北京:中国标准出版社,2007.
[11]卫生部. GB 5749-2006生活饮用水卫生标准[S].北京:中国标准出版社,2007.
[12]中华人民共和国国家质量监督检验检疫总局. GB/T 27404-2008实验室质量控制规范食品理化检测[S].北京:中国标准出版社,2008.
[13]章佳,何建游.水样存放时间对氨氮的测定的影响探究[J].农业与环境,2015,13(13):103.
[14]李陈泽,刘彬,刘璐鑫,等.不同存放条件及时间对水样三氮水平的影响[J].现代医药卫生,2014,30(23):3558-3560.
[15]余明星,郑红艳,汪光.纳氏试剂比色法测定水体中氨氮常见问题与解决办法[J].干旱环境监测,2005,19(2):121-123.
[16]夏晓萍.离子选择电极法测定水中氟化物的研究与探讨[J].重庆环境科学,2003,25(9):71-72.
[2]郭华,王军林,张小燕,等.沸石负载高锰酸钾去除低浓度氨氮[J].环境工程学报,2015,9(9):4321-4324.
[3]王朝阳,李捍东,王平.河道底泥中氨氮的微生物降解分析[J].四川环境,2008,27(2):39-42.
[4]卫生部. GB/T 5750. 5-2006生活饮用水卫生标准检验方法[S].北京:中国标准出版社,2007.
[5]闫祥.纳氏试剂比色法测定氨氮的影响因素分析[J].广东化工,2015,23(42):186-187.
[6]黄亿,张绍斌.纳氏试剂分光光度法测定水中氨氮的影响因素浅析[J].四川环境,2016,35(3):23-27.
[7]马淑勍,梁滨.利用自动分析仪测定水中氨氮的方法研究[J].山东化工,2015,44(4):76-78.
[8]中华人民共和国国家质量监督检验检疫总局. GB/T 6628-2008分析实验室用水规格和试验方法[S].北京:中国标准出版社,2008.
[9]刘志新,赵庆武.改良测定生活饮用水中氰化物的测定方法[J].医学动物防制,2016,32(5):586-587.
[10]卫生部. GB/T 5750. 3-2006生活饮用水卫生标准检验方法[S].北京:中国标准出版社,2007.
[11]卫生部. GB 5749-2006生活饮用水卫生标准[S].北京:中国标准出版社,2007.
[12]中华人民共和国国家质量监督检验检疫总局. GB/T 27404-2008实验室质量控制规范食品理化检测[S].北京:中国标准出版社,2008.
[13]章佳,何建游.水样存放时间对氨氮的测定的影响探究[J].农业与环境,2015,13(13):103.
[14]李陈泽,刘彬,刘璐鑫,等.不同存放条件及时间对水样三氮水平的影响[J].现代医药卫生,2014,30(23):3558-3560.
[15]余明星,郑红艳,汪光.纳氏试剂比色法测定水体中氨氮常见问题与解决办法[J].干旱环境监测,2005,19(2):121-123.
[16]夏晓萍.离子选择电极法测定水中氟化物的研究与探讨[J].重庆环境科学,2003,25(9):71-72.