测定锅炉水和冷却水中氯离子的新方法探讨罗桂甫

整理文档很辛苦,赏杯茶钱您下走!

免费阅读已结束,点击下载阅读编辑剩下 ...

阅读已结束,您可以下载文档离线阅读编辑

资源描述

DiscussiononthenewmethodofdeterminingchlorideionsinboilingwaterandcoolingwaterLuoGuifu,ZhangGuoqing,WuDaijuan(HunanChemicalEngineeringVocationalTechnicalCollege,Zhuzhou412004,China),,(,412004)[](Cl-)。-DL58,DM141,AgNO3。Cl-(、、)Cl-,,,,,、、、、。[];;;[]O661[]A[]1005-829X(2010)02-0060-04Abstract:Αnewmethodusingautomaticpotentialtitrationapparatusfordeterminingthecontentofchlorideinboilingwaterandcoolingwaterisintroduced.DL58whichismadebyMettler-ToledoAutomaticalPotentialΤitra-tionApparatusCo.hasbeenchosen.DM141silvercompositeelectrodehasbeenchosenasthedetector.AgNO3isusedastitrationagentintheautomatictitrationmethod.Comparedwiththestandard(traditional)methodsofdeter-miningchloride(suchasMohrmethod,Volhardmethod,andFajansmethod)andwiththechlorideselectivemethod,theresultsofthismethodaremoreaccurate.Thereproducibilityandaccuracyofthismethodarebetter.Thismethodisfasterandtheconsumptioncostofreagentismuchless.Itcouldbewidelyusedinthedeterminationofboilerwater,coolingwater,domesticsewage,partofindustrialwastewater,rainwateranddrinkingwater.Keywords:chloride;coolingwater;electrochemicalanalysis;automaticpotentialtitration。,(Cl-)(Fe2+)(OH-),,,。Cl-。Cl-〔1〕、〔2〕、〔3〕。Cl-,,AgCl,pH,、,。、、、,、。,Cl-,:Cl-、〔4〕、,。Mettler-ToledoDL58,DM141,AgNO3Cl-。,l-、。11.1Mettler-ToledoDL58、Mettler-30220102IndustrialWaterTreatmentVol.30No.2Feb.,201060——2010-02,30(2),:ToledoDG111-SCpH、Mettler-ToledoDM141-SC。1.2(AR)、(GR)、98%(GR)。(1)0.056mol/LAgNO3。9.52g,1000.0mL,1000.0mL,。(2)。200℃,;0.17g,0.0001g,500.0mL,500.0mL,(W1)。(3)2%H2SO4。250mL,100mL,0.1g,。3.0mL20.0g98%H2SO4,1000.0mL,250mL,1000.0mL,1000.0mL。(4):、。1.3(1)0.056mol/LAgNO3(DM141-SCDG111-SCpH):3100mL,50.0mL50.0mL,W2=W1/10。。,:,DG111-SCpHpH,pH4.5,2#2%H2SO4pH=4.5;,pH,1#0.056mol/LAgNO3,,,。3,,。,RSD0.1%。(1):c=W2V×100058.44(1):c———,mol/L;W2———,g;V———,mL。(2)Cl-(DM141-SCDG111-SCpH)。1100mL,50.0mL50.0mL,。,:,DG111-SCpHpH,pH4.5,2#2%H2SO4pH=4.5;,pH,1#0.056mol/LAgNO3,,,Cl-。Cl-(2):X=0.03545×c×V1V2×106(2):X———Cl-,mg/L;V1———,mL;V2———,mL。22.1,Ag+(SO32-、CO32-、C2O42-、OH-),(Fe3+、Al3+、Sn4+、Bi3+),,。,pH4~5,Ag+,、。pH,Mettler-ToledoDM141-SC,;I-Cl-,I-I2,。pHCl-,pH、Cl-100mg/L,SO32-、CO32-、OH-、Fe3+、Al3+61——2010-02,30(2)4/(mg·L-1)/(mg·L-1)/%600.0598.699.8500.0500.8100.2400.0399.199.8300.0300.5100.2200.0200.3100.2100.099.899.880.079.999.950.050.0100.030.030.1100.310.010.0100.021pHCl-pHCl-/(mg·L-1)Cl-/(mg·L-1)12343.010098.9398.8199.0798.894.010099.8699.93100.0799.955.0100100.13100.0999.88100.156.5100101.03101.17101.35101.078.0100105.3514.98105.17105.08Cl-/(mg·L-1)Cl-/(mg·L-1)RSD%12340.500.500.510.490.501.638.008.609.357.657.3311.178.008.537.668.397.586.098.008.768.259.159.275.192.002.532.392.762.486.213Cl-/(mg·L-1)Cl-/(mg·L-1)RSD/%123480.0080.1380.0680.1080.160.0580.0081.3881.0680.8281.250.3080.0080.9380.7681.1280.500.3380.0081.2381.6781.9581.530.3780.0080.5180.8280.6380.970.255(n=4)Cl-/(mg·L-1)/(mg·L-1)/(mg·L-1)/%1212.550.0263.2100.32120.8100.0221.2100.3360.3150.0210.6100.5430.7200.0231.0101.0,pHCl-,1。pH4~5、,。pH=4.5。2.2,0.48mg/L。〔5〕,0.45μg/L。Cl-〔6〕0.35mg/L。,Cl-,。,Cl-Cl-,Cl-,Cl-〔6〕。,、5mg/L,1mg/L。,(、、、),,。2。2.3Cl-100mg/L,Cl-50mg/L,,Cl-80mg/L,3。3,(、、、),、Ag+Cl-AgCl、pH、、、。,、、、,。,SO32-、OH-PO43-,;Br-PO43-,。Cl-,,,。2.42.4.1,Cl-。4、5。4、5,,99%~101%,,Cl-。2.4.2,Cl-62——2010-02,30(2)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!![](1962—),2006,,。:13973323987,E-mail:lgp3987@126.com。[]2009-10-20(),:。8,Cl-23.7~500.2mg/L,,RSD0~1%,,Cl-,。2.5,Br-、I-、S2-、PO43-1.0×10-5mol/L(Br-0.8mg/L、I-1.27mg/L、S2-0.32mg/L、PO43-0.95mg/L),Cl-,Cl-。I-S2-(),Cl-I-S2-。Br-、PO43-Cl-。Br-3mg/L,PO43-10mg/L,Cl-100mg/L,,AgBr,AgCl,Ag3PO4。,AgCl,Br-0.79×10-5mol/L(1.0×10-5mol/L),Br-;Ag3PO4,Cl-1.60×10-6mol/L(1.0×10-5mol/L),Cl-;Br-、Cl-、PO43-。E-V3Br-、Cl-、PO43-。Cl-,Br-、PO43-1.0×10-5mol/L,2Cl-。3(1)Cl-、,:Mettler-ToledoDL58;DG111-SCpH,2%pH=4.5;,0.056mol/LCl-,DM141-SC。(2)Cl-。Cl-80.00mg/L,0.30%,0.33%,0.37%,0.25%,0.05%。Cl-20~500mg/L,0~1%。,,。(3),Ag+Cl-AgCl,pH,、,。、、、,、,,,,。(4),60%,60%,60%。,。(5),Cl-,、,,,。[][1]GB/T15453—1995[S].[2]GB/T1576—2007[S].[3]GB658—1988[S].[4]HJ/T343—2007[S].[5],,.[J].,2005,32(2):194-198.[6].[M].:,1977:33-232.63——

1 / 4
下载文档,编辑使用

©2015-2020 m.777doc.com 三七文档.

备案号:鲁ICP备2024069028号-1 客服联系 QQ:2149211541

×
保存成功