【英文标准名称】:Soilquality-Determinationofexchangeableacidityinbariumchlorideextracts
【原文标准名称】:土壤质量氯化钡萃取液中互换酸性的测定
【标准号】:ISO14254-2001
【标准状态】:现行
【国别】:国际
【发布日期】:2001-08
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC190
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;试验;土壤;土壤普查;化学分析和试验;土壤组分;钡化合物;交换;离子交换;饱和;阳离子;阳离子交换;交换能力;pH值;质量;碱;含量测定
【英文主题词】:Acidity;Bariumcompounds;Bases(chemical);Cationexchange;Cations;Chemicalanalysisandtesting;Compositionoftheground;Determination;Determinationofcontent;Exchange;Exchangecapacity;Ionexchanges;Ionexchanging;pH;Quality;Saturation;Soilsurveys;Soils;Testing
【摘要】:ThisInternationalStandardspecifiesamethodforthedeterminationofexchangeableacidityinbariumchlorideextractsofsoilsamplesobtainedaccordingtoISO11260.Theproceduredescribedhereinmainlyconcernsthedeterminationoftotalexchangeableaciditybymeansofafixed-pHend-pointtitration(seenote).Twooptionalproceduresarealsogiven,describingrespectively,determinationsoffreeHacidityandofaluminiumintheextracts.ThisInternationalStandardisapplicabletoalltypesofair-drysoilsampleswhichhavebeenpretreatedinaccordancewithISO11464.NOTETitrationofexchangeableaciditybymeansofafixed-pHend-pointmaynotbespecifictoagivenacidspecies.Theend-pointpHvalueretainedis7,8,correspondingtocompleteprecipitationofAlionsinsyntheticsolutions.TitrationofsoilextractstothispHmayalsoincludesomemoreweaklyionizedspeciesorweakacidorganiccompounds.
【中国标准分类号】:P13
【国际标准分类号】:13_080_10
【页数】:5P.;A4
【正文语种】:英语