基本信息
标准名称: | 复混肥料中钾含量的测定 四苯硼酸钾重量法 |
英文名称: | Determination of potassium content for compound fertilizers--Potassium tetraphenylborate gravimetric method |
中标分类: |
化工 >>
化肥、农药 >>
化肥基础标准与通用方法 |
ICS分类: |
农业 >>
肥料
|
替代情况: | GB/T 8574-1988;被GB/T 8574-2010代替 |
发布部门: | 中华人民共和国国家质量监督检验检疫总局 |
发布日期: | 2002-09-24 |
实施日期: | 2003-04-01 |
首发日期: | 1988-01-04 |
作废日期: | 2011-03-01 |
主管部门: | 中国石油和化学工业协会 |
提出单位: | 中国石油和化学工业协会 |
归口单位: | 全国肥料和土壤调理剂标准化技术委员会 |
起草单位: | 上海化工研究院 |
起草人: | 周勇明、刘刚 |
出版社: | 中国标准出版社 |
出版日期: | 2003-04-01 |
页数: | 平装16开, 页数:5, 字数:9千字 |
书号: | 155066.1-19075 |
适用范围
本标准规定了复混肥料中钾含量的测定。本标准适用于复混肥料中钾含量的测定。
前言
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目录
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引用标准
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所属分类: 化工 化肥 农药 化肥基础标准与通用方法 农业 肥料
【英文标准名称】:StandardTestMethodforDeterminingaSorptionConstant(Koc)foranOrganicChemicalinSoilandSediments
【原文标准名称】:测量土壤和沉积物中有机化学物质吸收常数(Koc)的标准试验方法
【标准号】:ASTME1195-2001(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2001
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E47.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:equilibriumsorptioncoefficients;partitioningoforganicchemicals;sorptionconstant(Koc);Carbon;Centrifugemethod;Chemicals(environmentalanalysis);Environmentalorganiccompounds;Environmentalsiteasse
【摘要】:Sorptiondataareusefulforevaluatingthemigratorytendencyofchemicalsintotheair,water,andsoilcompartmentsofourenvironment.Theycanbeusedinthepredictionorestimationofvolatilityfromwaterandsoil,concentrationinwater,leachingthroughthesoilprofile,run-offfromlandsurfacesintonaturalwaters,andbiologicalavailability.AdditionalinformationconcerningtestingtodeterminesorptioncoefficientscanbefoundinOECDTestGuideline106(7).Thistestmethodassumesthatsorptionofatleastnonpolarorganicchemicalsismainlyinfluencedbytheorganicmatterofthesoilorsedimentsolids.Thereisampleevidenceintheliteraturetosupportthisassumption,andtheuserofthistestmethodshouldrefertoRef.(2)formoreinformationonthissubject.Organiccarboncontentischosenasthebasisforsorptioninsteadoforganicmattercontent.Thisisbecauseorganiccarbonvaluesgenerallyaremeasureddirectlybyanalyticalmethods.Organicmattermaybeestimatedbymultiplicationoftheorganiccarbonvaluesbyasomewhatarbitraryconstantof1.7(3).Thistestmethodisbasedontheassumptionthatallofthematerialsorbedtothesolidsisreversiblybound.Theanalysesdescribedhereinassumeequilibriumbetweentheliquidandsolidconcentrationsofthetestcompound.Insomecases,theremaybeafractionofthecompoundthatisirreversiblyboundtothesolids.Forthesecases,themeasurementsmadebythetestmaynotreflectatruex201C;equilibriumx201D;.Theirreversiblesorptionphenomenahasbeenextensivelydocumentedandthereaderisreferredto(9),(10)and(8)formorediscussiononthistopic.Asorptionconstantisobtainedandisessentiallyindependentofsoilpropertiesotherthanorganiccarbon.Thisvalueisusefulbecause,onceitisdetermined,thesorptiondistributioncharacteristicsforanysolidcanbeestimatedbasedonitsorganiccarboncontent.Thistestmethodisdesignedtoevaluatesorptionatenvironmentallyrelevantconcentrationsasafunctionoforganiccarboncontentofdifferentsoilandsedimentsolids.Therefore,thenumberofdifferentsolidsisemphasizedintheprocedureratherthanthenumberofchemicalconcentrationsstudiedwitheachsolid.Ingeneral,oneconcentrationisemployedsincethetestmethodassumesthatatlowsolutionconcentrations,sorptionisothermsapproximatelinearityandsorbedconcentrationsdonotexceedtypicalenvironmentalloading.Errorsarisingfromconcentrationeffectsatlowenvironmentalconcentrationsusuallyarelessthanthevariationexistingbetweendifferentsolids,whendealingwithsorptiontrendsinageneralmanner.Therefore,theinitialconcentrationofthetestchemicalinsolutionshouldnotexceed0.5ofitswatersolubility.Asanoption,aprocedureisgivenfordeterminingconcentrationeffectsonsorption.Thisisbecausehighconcentrationsmaybepresentincertainenvironmentalsituations;suchaslandfillsandspills.Thisprocedureshouldbedoneatfourconcentrationsoverahundredfoldconcentrationrange(forexample,0.1,0.5,2,and10ppminitialsolutionconcentration).Iflowsolubilitypresentsanalyticaldifficulties,solutionconcentrationsshouldrangeoveratleastoneorderofmagnitude.TheFreundlichequationisanappropriateexpressionoftheseeffects:where:Ca
【中国标准分类号】:Z18
【国际标准分类号】:13_080_10
【页数】:9P.;A4
【正文语种】:英语