环境监测管理与技术
環境鑑測管理與技術
배경감측관리여기술
THE ADMINISTRATION AND TECHNIQUE OF ENVIRONMENTAL MONITORING
2014年
2期
42-44
,共3页
总氮%麝香草酚%分光光度法%水质
總氮%麝香草酚%分光光度法%水質
총담%사향초분%분광광도법%수질
Total nitrogen%Thymol%Spectrophotometry%Water quality
采用消解仪替代高压蒸汽灭菌器消解水样，用麝香草酚分光光度法替代紫外分光光度法测定总氮。试验表明，方法在0 mg/L～10．0 mg/L范围内线性良好，相关系数 R为0．9999；方法检出限为0．04 mg/L；测定低、中、高质量浓度的标准溶液，RSD为1．1％～5．5％；对3份实际水样进行加标回收试验，回收率为94．6％～98．2％，测定总氮标准品，结果在保证值范围内；用该方法与国标方法同时测定水样，测定结果的相对偏差＜5％。
採用消解儀替代高壓蒸汽滅菌器消解水樣，用麝香草酚分光光度法替代紫外分光光度法測定總氮。試驗錶明，方法在0 mg/L～10．0 mg/L範圍內線性良好，相關繫數 R為0．9999；方法檢齣限為0．04 mg/L；測定低、中、高質量濃度的標準溶液，RSD為1．1％～5．5％；對3份實際水樣進行加標迴收試驗，迴收率為94．6％～98．2％，測定總氮標準品，結果在保證值範圍內；用該方法與國標方法同時測定水樣，測定結果的相對偏差＜5％。
채용소해의체대고압증기멸균기소해수양，용사향초분분광광도법체대자외분광광도법측정총담。시험표명，방법재0 mg/L～10．0 mg/L범위내선성량호，상관계수 R위0．9999；방법검출한위0．04 mg/L；측정저、중、고질량농도적표준용액，RSD위1．1％～5．5％；대3빈실제수양진행가표회수시험，회수솔위94．6％～98．2％，측정총담표준품，결과재보증치범위내；용해방법여국표방법동시측정수양，측정결과적상대편차＜5％。
Total nitrogen in water was determined by digestion instrument-thymol spectrophotometry in stead of autoclave digestion UV spectrophotometry.The results showed that there was a good linear relation between the concentrations of nitrate-N and the absorption values in the range of 0 mg/L~10.0 mg/L and the correlation co-efficient was 0.999 9.The method detection limit was 0.04 mg/L.When determining the standard solution of low,medium and high concentrations,the RSDs ranged from 1 .1% to 5 .5%,and the recovery rates were 94.6%~98.2%.The relative deviation between the current method and the national criteria was less than 5%.
