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地表水检测中氨氮高于总氮的原因探讨赵 楠, 李建坡, 丁致英, 海 燕, 董纪珍(北京城市排水集团有限责任公司水质检测中心,北京100022) : 针对采用国标方法测定同一水样的氨氮和总氮时所出现的氨氮浓度高于总氮浓度的情况,分析了测定方法的准确性,并分析了各影响因素对测定结果的影响。结果表明,消解时间不足造成了总氮测定结果偏低,提出对于成分复杂、色度较高的地表水水样,将消解时间延长至60min可提高测定结果的准确度。 : 氨氮; 总氮; 消解时间:TU991.1 :C :1000-4602(2006)22-0089-03DiscussionontheReasonsforAmmoniaNitrogenConcentrationHigherthanTotalNitrogeninSurfaceWaterQualityMeasurementZHAONan, LIJian-po, DINGZhi-ying, HAIYan, DONGJi-zhen(WaterQualityAnalysisCenter,BeijingDrainageGroupCo.Ltd.,Beijing100022,China) Abstract: Aimedattheproblemthatcontentofammonianitrogenishigherthanthatoftotalnitro-genmeasuredwithnationalstandardmethodforthesamewatersample,theaccuracyandaffectingfactorsofboththemethodswerestudied.Theresultsshowthatthedeterminationofammonianitrogenisaccu-rate,howevertotalnitrogencontentislowduetoshortageofdigestiontime.Itisconsideredthatprolon-gingdigestiontimeto60mincanimprovethedetectionprecisionoftotalnitrogenforhighcolorandcom-plexcontentsurfacewatersamples. Keywords: ammonianitrogen; totalnitrogen; digestiontime ,(GB7479—87,《》)[1],-(GB11894—89,《》)[2]。,、,,,,(25.2mg/L,23.0mg/L),。1 试验试剂与仪器1.1 :①20g25mL,(HgCl2)(10g),。②60g250mL,①、,400mL。,,。10%、5%、50%、、1+9、(18.2MΨ/cm)。1.2 72008500;(0.11~0.14MPa);EasypureiiUV/UF。·89·第22卷 第22期2006年11月 中国给水排水CHINAWATERWASTEWATER Vol.22No.22Nov.20062 结果与讨论、、、、、[3]。,、、。2.1 2.1.1 ,。,,,,。,1。1,,。1 Tab.1 Influenceofchromaonammonianitrogendetection0.45μmA0.0980.0970.0980.096/(mg·L-1)25.024.925.024.5 : 5。2.1.2 ,2。,102.5%,,。2 Tab.2 Recoveryofammonianitrogenwithstandardadditionmg·L-11234525.125.325.325.125.120.020.020.020.020.0+45.145.846.145.646.12.2 2.2.1 、。,、、,3。3,《》、,。3 Tab.3 Comparisonoftheconcentrationoftotalnitrogenmg·L-1 1234529.127.629.427.628.028.30.160.140.150.160.140.150.00.00.00.00.00.0++29.327.729.627.828.128.524.123.122.122.723.023.02.2.2 ,,,(),。,,。30min,4。4,275nm、,,275nm。,,。4 Tab.4 Influenceofturbidityontotalnitrogendetection1234567275nm0.00010.00040.00030.00100.00070.00130.0007/(mg·L-1)31.031.031.030.931.030.931.0275nm0.00000.00020.00040.00020.00050.00020.0007/(mg·L-1)52.152.252.452.752.052.652.62.2.3 [4]。·90·第22期 中国给水排水 第22卷,,0.04mg/L,,。2.2.4 5mL10mL60min,,5。5,,,5mL。。5 Tab.5 Influenceofapplicationamountofoxidantontotalnitrogendetectionmg·L-1123455mL27.828.828.828.728.828.610mL28.328.029.128.628.128.42.2.5 121℃,1mL5mL30、45、60min,6。,,60min,,。,。,60min。6 Tab.6 Influenceofdigestiontimeontotalnitrogendetectionmg·L-11234530min19.516.717.019.117.017.945min24.123.122.122.723.023.060min27.828.828.828.728.828.62.2.6 ,,7,106.5%,,。7 Tab.7 Recoveryoftotalnitrogenwithstandardadditionmg·L-11234530.930.830.830.931.020.020.020.020.020.0+52.152.452.152.152.2 ,、。,。3 结论① ,。② 、、,,60min,。、、。:[1] GB11894—89,——[S].[2] GB7479—87,——[S].[3] .[J].,2004,23():219-220.[4] .(4)[M].:,2002.:(010)87743414E-mail:jzhdong1978@163.com:2006-05-11··广州市花都区新华污水处理厂扩建(一期)工程 处理规模:10×104m3/d;总投资:11395.63万元;占地面积:5.33hm2;处理工艺:改良型A/A/O处理工艺;主要设备:粗格栅、提升泵、细格栅、单级高速离心鼓风机、桥式单管刮吸泥机、微空曝气系统、水下推进器、紫外线消毒系统、潜污泵、浓缩脱水一体机;进展阶段:初步设计;建设单位:中科成环保集团股份有限公司;设计单位:中科成环保集团股份有限公司。( )·91·第22期赵 楠,等:地表水检测中氨氮高于总氮的原因探讨第22卷
本文标题:地表水检测中氨氮高于总氮的原因探讨
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