項目四：肥料分析任務(wù)一：固體樣品采樣方法固體樣品采樣工具與采樣方法課程：工業(yè)分析中文Scenario4:FertilizerAnalysisTask1:SamplingmethodforsolidsamplesSamplingtoolsandmethodsforsolidsamplesCourse:IndustrialAnalysisEglish

一、固體樣品采樣工具固體存在形態(tài)粉末狀顆粒狀表面堅硬的固體固體一般均勻性較差，存在形態(tài)不同，使用的采樣工具也有差異，同時注意取樣有代表性中文

一、SamplingtoolsforsolidsamplesTheformofsolidexistencethestateofsomethingwhichlikepowdergraininessAsolidwithahardsurfaceSolidsgenerallyhavepooruniformity,andthesamplingtoolsusedduringsamplingmayvaryduetotheirdifferentshapes.Atthesametime,itisimportanttoensurethatthecollectedsamplesarerepresentativeEglish可采集粉末狀、小顆粒狀、塊狀固體樣品，一般從物料堆表面采集樣品取樣鏟中文Thesamplingshovelcancollectpowder,smallparticle,andblocksolidsamples,usuallycollectedfromthesurfaceofthematerialpileSamplingshovelEglish取樣探子適用于粉末、小顆粒、小晶體等固體化工產(chǎn)品采樣，可深入樣品內(nèi)部采集樣品。采樣探子分為末端開口的采樣探子、末端封閉的采樣探子、窗口關(guān)閉式采樣探子和布袋式采樣探子。末端封閉式布袋式可封閉式中文SamplingprobeThesamplingprobeissuitableforsamplingsolidchemicalproductssuchaspowders,smallparticles,andsmallcrystals,andcancollectsamplesdeepinsidethesample.Samplingprobesaredividedintoendopeningsamplingprobes,endclosedsamplingprobes,windowclosedsamplingprobes,andbagsamplingprobes.endclosedsamplingprobebagsamplingprobewindowclosedsamplingprobeEglish取樣鉆：由金屬圓筒和旋轉(zhuǎn)鉆頭組成，適用于較堅硬的固體采樣中文Samplingdrill:composedofametalcylinderandarotatingdrillbit,suitableforsamplinghardersolidsEglish3、確定采取樣品的方法一般采樣程序為：1、確定采取的樣品數(shù)2、確定采取的樣品量

二、采樣方法中文3.DeterminethemethodoftakingsamplesThegeneralsamplingprocedureis:1.Determinethenumberofsamplestobetaken2.Determinethesamplesizetobetaken

二、SamplingmethodEglish1、采樣單元數(shù)的確定（1）單元物料

采樣單元數(shù)n的確定(N為總件數(shù)）:

單元數(shù)＞500時，按n=3×單元數(shù)＜500時，按照規(guī)定件數(shù)取樣中文1.Determinationofthenumberofsamplingunits（1）UnitmaterialDeterminationofthenumberofsamplingunitsn(Nisthetotalnumberofpieces):Whenthenumberofunits>500,

Whenthenumberofunitsislessthan500,takesamplesaccordingtothespecifiednumberofpiecesEglish總體物料單元選取的最少單元總體物料單元選取的最少單元1~10全部單元182~2161811~4911217~2541950~6412255~2962065~8113297~3432182~10114344~39422102~12515395~45023126~15116451~50024152~18117采樣單元數(shù)的規(guī)定中文OverallmaterialunitOverallmaterialunitMinimumunitsselectedMinimumunitsselectedTotalunitsRegulationsonthenumberofsamplingunitsEglish當(dāng)物料量少于2.5t，采樣量為7個單元（或點）當(dāng)物料量為2.5~80t時，采樣量單元為當(dāng)物料量大于80t，采樣為40個單元（2）散裝物料中文Whenthematerialquantityislessthan2.5t,thesamplingquantityis7units(orpoints)Whenthematerialquantityis2.5-80t,thesamplingunitisWhenthematerialquantityisgreaterthan80t,thenumberofsamplingunitsis40（2）bulkmaterialsEglish對采得的樣品如需要制樣處理時，必須滿足加工處理的需要2、樣品量的確定滿足以下要求滿足三次重復(fù)檢測用量當(dāng)需要留存?zhèn)淇紭悠窌r，滿足備考樣品量中文Ifsamplepreparationandprocessingarerequiredforthecollectedsamples,theymustmeettheprocessingrequirements2、DeterminationofsamplesizeMeetthefollowingrequirements:SatisfytheusageofthreerepeatedtestsWhenitisnecessarytoretainpreparationsamples,theamountofpreparationsamplesmustbemetEglishT-采樣的質(zhì)量間隔Q-樣品批量，tn-采樣的單元數(shù)3、采樣方法的確定（1）從物料流中采樣用合適采樣器隨機(jī)或按一定時間間隔采樣，如按時間間隔采樣，采樣的質(zhì)量間隔T為：中文T-qualityintervalforsamplingQ-thetotalamountofabatchofsamples,tn-numberofsampledunits3、Determinationofsamplingmethod（1）SamplingfrommaterialflowWhensamplinginthematerialflow,useasuitablesamplertorandomlyoratacertaintimeintervalforsampling.Ifsamplingisdoneatatimeinterval,thequalityintervalTforsamplingis:Eglish布點時首末兩個點距車角至少1米，其他點平均布置取樣點布置在運輸工具的對角線上，可以用三點法、五點法布置采樣點。三點法五點法（2）從運輸工具中采樣中文Whenarrangingpoints,thefirstandlasttwopointsshouldbeatleast1meterawayfromthecornerofthecar,andtheotherpointsshouldbeevenlyarrangedonthediagonalThesamplingpointsarearrangedonthediagonalofthetransportationvehicle,andcanbearrangedusingthethree-pointmethodorthefivepointmethod.three-pointmethodfivepointmethod（2）SamplingfromtransportationvehiclesEglish（3）從物料堆中采樣根據(jù)物料堆的形狀和子樣的數(shù)目，將取樣點分布在堆的頂部、腰部、底部（底部距地面0.5m）采樣時先除去0.2m的表層再采樣中文（3）SamplingfrommaterialpileAccordingtotheshapeofthematerialpileandthenumberofsubsamples,distributethesamplingpointsatthetop,waist,andbottomofthepile(0.5

mfromthegroundatthebottom)Remove0.2

mofsurfacelayerbeforesamplingEglish項目四：肥料分析任務(wù)二：磷肥分析肥料種類及磷肥制樣方法課程：工業(yè)分析中文Scenario4:FertilizerAnalysisTask2:PhosphatefertilizeranalysisFertilizertypesandphosphorusfertilizersamplingmethodsCourse:IndustrialAnalysisEglish一、肥料種類及取樣方法

植物生長，幾乎需要所有的化學(xué)元素，但最主要的是N、P、K三要素。肥料的作用？肥料是促進(jìn)植物生長，提高農(nóng)作物產(chǎn)量的重要物質(zhì)之一。

N、P、K由何而來呢？植物生長的三要素？肥料中文一、Fertilizertypesandsamplingmethods

Plantgrowthrequiresalmostallchemicalelements,butthemostimportantonesareN,P,andK.Whatisthefunctionoffertilizer?Fertilizerisoneoftheimportantsubstancesthatpromoteplantgrowthandincreasecropyield.

N、P、KWherediditcomefrom?Whatarethethreeelementsofplantgrowth?fertilizerEglish磷肥的作用促進(jìn)籽粒飽滿；促使棉花、瓜類、茄果類蔬菜及果樹的開花結(jié)果，提高結(jié)果率；增加甜菜、甘蔗、西瓜等的糖分；油菜籽的含油量。近年來世界磷肥工業(yè)逐漸復(fù)蘇，生產(chǎn)能力增長較快，中國、美國及印度成為世界三大磷肥生產(chǎn)國。中文TheroleofphosphatefertilizerPhosphatefertilizercanpromoteplumpgrains;Promotethefloweringandfruitingofcotton,melons,eggplantvegetables,andfruittrees,andimprovethefruitingrate;Increasethesugarcontentofsugarbeets,sugarcane,watermelons,etc;Increasetheoilcontentofrapeseed.Inrecentyears,theworld'sphosphatefertilizerindustryhasgraduallyrecoveredandproductioncapacityhasgrownrapidly.China,theUnitedStates,andIndiahavebecometheworld'sthreelargestphosphatefertilizerproducingcountries.Eglish

以礦物、空氣、海水等為原料，經(jīng)化學(xué)和機(jī)械加工方法制造，能供給農(nóng)作物營養(yǎng)及提高土壤肥力的化學(xué)物質(zhì)。肥料包括自然肥料和化學(xué)肥料。中文

Chemicalfertilizersarechemicalsmadefromminerals,air,seawater,andotherrawmaterialsthroughchemicalandmechanicalprocessingmethods,whichcanprovidenutrientstocropsandimprovesoilfertility.Fertilizersincludenaturalfertilizersandchemicalfertilizers.ClassificationofchemicalfertilizersDividedbynutritionalelementsnitrogenfertilizerphosphatefertilizerpotashfertilizerCompoundfertilizerTraceelementfertilizerEglish

有效成分含量，磷肥以有效五氧化二磷的質(zhì)量分?jǐn)?shù)表示。氮肥以氮元素的質(zhì)量分?jǐn)?shù)表示。鉀肥以氧化鉀的質(zhì)量分?jǐn)?shù)表示。微量元素以該元素的質(zhì)量分?jǐn)?shù)表示。

化學(xué)肥料的分析項目包括水分含量，有效成分含量和雜質(zhì)含量等分析?；瘜W(xué)性質(zhì)酸性肥料:硫酸銨中性肥料:尿素堿性肥料:碳酸氫銨中文Theeffectiveingredientcontentisexpressedasthemassfractionofeffectivephosphoruspentoxideinphosphorusfertilizer.Nitrogenfertilizerisexpressedasthemassfractionofnitrogenelement.Potassiumfertilizerisexpressedasthemassfractionofpotassiumoxide.Traceelementsarerepresentedbytheirmassfraction.Theanalysisitemsofchemicalfertilizersincludemoisturecontent,activeingredientcontent,andimpuritycontent.化學(xué)性質(zhì)Acidfertilizer:ammoniumsulfateNeutralfertilizer:ureaAlkalinefertilizer:ammoniumbicarbonate

ClassifiedbychemicalpropertiesEglish

取樣時，將取樣探子由袋口的一角沿對角線插入袋內(nèi)的1/3～3/4處，旋轉(zhuǎn)180°后抽出，刮出鉆槽中物料作為一個子樣。取樣探子

對于袋裝化肥，通常規(guī)定50件以內(nèi)抽取5件；51～100件，每增10件，加取1件；101～500件，每增50件，加取2件；501～1000件以內(nèi)，每增100件，加取2件；1001～5000件以內(nèi)，每增100件，加取1件。將子樣均勻地分布該批物料中，然后用采樣工具進(jìn)行采集。二、肥料的取樣中文Whensampling,insertthesamplingprobediagonallyfromonecornerofthebagopeninginto1/3to3/4ofthebag,rotate180°,andthenextractit.Scrapeoutthematerialinthedrillinggrooveasasubsample.samplingprobe

Forbaggedfertilizers,itisusuallyrequiredtoextract5pieceswithin50pieces;51-100pieces,foreveryadditional10pieces,anadditionalpiecewillbetaken;101-500pieces,foreveryadditional50pieces,anadditional2pieceswillbetaken;Within501-1000pieces,foreveryadditional100pieces,anadditional2pieceswillbetaken;Within1001-5000pieces,foreveryadditional100pieces,anadditionalpiecewillbetaken.Distributethesubsamplesevenlyamongthebatchofmaterials,andthencollectthemusingsamplingtools.二、SamplingoffertilizersEglish

在分析之前，應(yīng)將所采的一瓶樣品粉碎至規(guī)定粒度(一般要求不超過1~2mm)，混合均勻，用四分法縮分至100g左右，置于潔凈、干燥瓶中，作質(zhì)量分析之用。

將每批所選取的樣品合并在一起充分混勻，然后用四分法縮分至不少于500g，分裝在兩個清潔、干燥并具有磨口塞的廣口瓶或帶蓋聚乙烯瓶中，貼上標(biāo)簽。注明生產(chǎn)廠家、產(chǎn)品名稱、批號、采樣日期和采樣人姓名。一瓶供試樣制備，一瓶密封保存2個月以備。中文

Beforeanalysis,thecollectedsamplesshouldbecrushedtothespecifiedparticlesize(generallynotexceeding1-2mm),mixedevenly,andreducedtoabout100gusingthequarteringmethod.Theyshouldbeplacedinacleananddrybottleforqualityanalysis.

Combinetheselectedsamplesfromeachbatchandmixthoroughly.Then,usethequarteringmethodtoreducethemtonolessthan500g.Dividethemintotwoclean,drywidemouthedbottlesorcappedpolyethylenebottleswithgroundstoppers,andlabelthem.Indicatethemanufacturer,productname,batchnumber,samplingdate,andnameofthesampler.Onebottleisforsamplepreparation,andonebottleissealedandstoredfor2monthsforpreparation.Eglish三、磷肥制樣方法1、磷肥分類分類

自然磷肥：磷礦石、骨粉及骨灰等化學(xué)磷肥：以自然礦石為原料，經(jīng)化學(xué)加工處理的含磷肥料中文三、Samplepreparationmethodforphosphatefertilizer1、ClassificationofphosphatefertilizersClassificationNaturalphosphatefertilizer:phosphaterock,bonemeal,andboneash,etcChemicalphosphorusfertilizer:afertilizercontainingphosphorusobtainedthroughchemicalprocessingusingnaturaloresasrawmaterialsEglish

酸法磷肥(速效磷肥)：用無機(jī)酸加工處理磷礦石所制造的，如過磷酸鈣，重過磷酸鈣，因其中含有易溶于水的磷化物，植物易吸收，故又稱為“速效磷肥”。

熱法磷肥(遲效磷肥)：磷礦石和其他配料(如白云石、滑石等)或不加配料，經(jīng)高溫煅燒分解所制造的磷肥。如鈣鎂磷肥、鋼渣磷肥等。因其所含磷化物難溶于水，施用后經(jīng)長時間后可被土壤中有機(jī)弱酸緩慢溶解而被植物吸收，故又稱為“遲效磷肥”。化學(xué)磷肥根據(jù)加工方法不同可以分為：中文Acidbasedphosphatefertilizer:Fertilizermadebyprocessingphosphaterockwithinorganicacids,suchascalciumsuperphosphateandheavysuperphosphate,isalsoknownas"quickactingphosphatefertilizer"becauseitcontainswater-solublephosphidesthatareeasilyabsorbedbyplants.Thermalphosphatefertilizer:phosphaterockandotheringredients(suchasdolomite,talc,etc.)orphosphatefertilizerproducedbyhigh-temperaturecalcinationanddecompositionwithoutingredients.Suchascalciummagnesiumphosphatefertilizer,steelslagphosphatefertilizer,etc.Duetoitsinsolublephosphidesinwater,itcanbeslowlydissolvedbyorganicweakacidsinthesoilandabsorbedbyplantsafterlong-termapplication,henceitisalsoknownas"delayedactingphosphatefertilizer".Chemicalphosphorusfertilizercanbedividedinto:Eglish

磷肥的組成較為復(fù)雜，往往一種磷肥中同時含有幾種不同性質(zhì)的含磷化合物。磷肥的主要成分是磷酸的鈣鹽，有的還含有游離的磷酸。磷肥組成不一樣，溶解性不一樣，制樣方法也是有差異的。中文

Thecompositionofphosphorusfertilizerisrelativelycomplex,oftencontainingseveralphosphoruscontainingcompoundswithdifferentpropertiesinonetypeofphosphorusfertilizer.Themaincomponentofphosphatefertilizeristhecalciumsaltofphosphate,someofwhichalsocontainfreephosphate.

Thecompositionofphosphorusfertilizervaries,andthesolubilityandsamplepreparationmethodsalsovary.Eglish

檢驗中是指被檸檬酸銨溶液或2%檸檬酸溶液溶解的含磷化合物。中文WatersolublephosphoruscompoundsPhosphoricacid,calciumdihydrogenphosphate(alsoknownasmonocalciumphosphate)[Ca(H2PO4)2]Calciumsuperphosphateandheavysuperphosphatemainlycontainwater-solublephosphoruscompounds,sotheyarealsocalledwater-solublephosphorusfertilizers.CitricacidsolublephosphoruscompoundsThephosphoruscompoundsthatcanbedissolvedbyacidicsubstancessecretedbyplantrootsandabsorbedandutilizedbyplantsarecalledlemonsolublephosphoruscompounds.Suchascrystallinecalciumhydrogenphosphate,alsoknownasdicalciumphosphate(CaHPO4

·2H2O)ortetracalciumphosphate(Ca4P2O9

or4CaO·P2O5).Citricacidsolublephosphoruscompoundsrefertophosphoruscontainingcompoundsdissolvedinammoniumcitratesolutionor2%citricacidsolutionduringtesting.Eglish全磷：磷肥中所有含磷化合物中含磷量的總和。

不論是全磷還是有效磷僅是制備試液的方法不同，其測定方法相同。有效磷：水溶性磷化物和檸檬酸溶性磷化合物中的磷。中文Totalphosphorus:Thetotalphosphoruscontentofallphosphoruscontainingcompoundsinphosphorusfertilizer.Whetheritistotalphosphorusoreffectivephosphorus,themethodofpreparingthetestsolutionisdifferent,andthedeterminationmethodisthesame.Effectivephosphorus:phosphorusinwater-solublephosphidesandcitricacidsolublephosphoruscompounds.InsolublephosphoruscompoundsPhosphoruscontainingcompoundsthatareinsolubleinorganicweakacids,suchastricalciumphosphate[Ca3(PO4)2],ironphosphate,aluminumphosphate,etc.,arecalledinsolublephosphoruscompoundsEglish

稱取過磷酸鈣約1.5g或重過磷酸鈣約0.8g（含P2O5約200-300毫克）于小乳缽中，加水約25mL，小心研磨5-10分鐘，靜置待澄清。以慢速濾紙傾瀉過濾于已經(jīng)預(yù)先注有1：1硝酸5mL的250mL容量瓶中。向乳缽內(nèi)的殘渣中，再加水約25mL，繼續(xù)研磨、澄清、過濾，共三次。最后一次，將殘渣全部轉(zhuǎn)移于濾紙上。充分洗滌至容量瓶內(nèi)溶液的體積約230mL左右。稀釋至刻度，混合均勻，供測定水溶性磷。例如：（1）水溶性磷的提取2、磷肥制樣方法中文

Weighabout1.5gofcalciumsuperphosphateorabout0.8gofheavycalciumsuperphosphate(containingabout200-300milligramsofP2O5)inasmallbowl,addabout25mLofwater,carefullygrindfor5-10minutes,andletitstandforclarification.Pourandfilterslowlywithfilterpaperintoa250mLvolumetricflaskprefilledwith5mLof1:1nitricacid.Addabout25mLofwatertotheresidueinthebowl,continuegrinding,clarifying,andfilteringthreetimes.Forthelasttime,transferalltheresidueontothefilterpaper.Washthoroughlyuntilthevolumeofthesolutioninthevolumetricflaskisabout230mL.Dilutetothemark,mixevenly,andusethissolutionformeasuringwater-solublephosphorus.example：（1）Extractionofwater-solublephosphorus2、SamplepreparationmethodforphosphatefertilizerEglish（2）檸檬酸溶性磷的提取中文（2）ExtractionofCitricAcidSolublePhosphorusUsinganammoniasolutionofammoniumcitrateora2%citricacidsolutionasanextractant,thephosphorusfertilizerresidueafterextractingwater-solublephosphorusisextracted.Theammoniasolutionofammoniumcitrate,alsoknownasPetermannreagent,iscomposedof173gofunweatheredmonohydratecitricacidand51gofammoniain1LofsolutionEglish在測定全磷時，通常直接用鹽酸和硝酸混合酸溶，鹽酸是溶解難溶性磷化合物，硝酸主要是防止磷被還原成PH3而揮發(fā)損失。（3）難溶性磷的提取中文Whenmeasuringtotalphosphorus,amixtureofhydrochloricacidandnitricacidisusuallyusedtodissolvephosphorusfertilizerdirectly.Hydrochloricaciddissolvesinsolublephosphoruscompounds,whilenitricacidmainlypreventsphosphorusfrombeingreducedtoPH3andcausingvolatilizationloss.（3）ExtractionofinsolublephosphorusinsolublephosphorusisgenerallydissolvedinstrongacidssuchashydrochloricacidEglish項目四：肥料分析任務(wù)四：鉀肥分析鉀肥分析課程：工業(yè)分析中文Scenario4:FertilizerAnalysisTask4:PotassiumfertilizeranalysisPotassiumfertilizeranalysisCourse:IndustrialAnalysisEglish一、鉀肥種類中文一、TypesofpotassiumfertilizersPotassiumfertilizerisdividedintotwocategories:naturalpotassiumfertilizerandchemicalpotassiumfertilizer.Thesumofwater-solubleandweaklyacidsolublepotassiumsaltsinpotassiumfertilizeriscalledeffectivepotassium.Thesumofavailablepotassiumandinsolublepotassiumsaltsiscalledtotalpotassium.ThepotassiumcontentofpotassiumfertilizerisexpressedasK2O.Whenmeasuringeffectivepotassium,asamplesolutionisusuallypreparedbydissolvingitinhotwater;Ifthesamplecontainsweaklyacidsolublepotassiumsalt,dissolvetheavailablepotassiuminhotwaterwithasmallamountofhydrochloricacidadded.Whenmeasuringthetotalpotassiumcontent,thesamplesolutionisgenerallypreparedbystrongaciddissolutionoralkalimeltingmethod.Eglish二、鉀肥分析方法

鉀肥中有效鉀的測定方法有四苯硼酸鉀重量法、四苯硼酸鈉容量法和火焰光度法。四苯硼酸鉀重量法和四苯硼酸鈉容量法簡便、準(zhǔn)確、快速，適用于含氧化鉀量較高的鉀肥測定。當(dāng)試樣中含氧化鉀小于2%時，采用火焰光度法測定。中文二、Analysismethodsforpotassiumfertilizer

Themethodsfordeterminingeffectivepotassiuminpotassiumfertilizersincludepotassiumtetraphenylborategravimetricmethod,sodiumtetraphenylboratevolumetricmethod,andflamephotometry.

Thepotassiumtetraphenylborategravimetricmethodandthesodiumtetraphenylboratevolumetricmethodaresimple,accurate,andfast,suitableforthedeterminationofpotassiumfertilizerswithhighpotassiumoxidecontent.Whenthecontentofpotassiumoxideinthesampleislessthan2%,flamephotometryisusedformeasurement.Eglish（1）方法原理：在堿性條件下加熱消除試樣溶液中銨離子的干擾，加入乙二胺四乙酸二鈉(EDTA)螯合其他微量陽離子，以消除干擾分析結(jié)果的陽離子。在微堿性介質(zhì)中，四苯硼酸鈉與鉀反應(yīng)生成四苯硼酸鉀沉淀，過濾、干燥沉淀并稱量。1、四苯硼酸鉀重量法中文(1)Methodprinciple:Heatunderalkalineconditionstoeliminatetheinterferenceofammoniumionsinthesamplesolution,andadddisodiumethylenediaminetetraacetate(EDTA)tochelateothertracecationstoeliminatetheinterferenceofcationsintheanalysisresults.Inaslightlyalkalinemedium,sodiumtetraphenylboratereactswithpotassiumtoformpotassiumtetraphenylborateprecipitate,whichisfiltered,dried,andweighed.1、potassiumtetraphenylborategravimetricmethodwhiteEglish（2）結(jié)果計算氧化鉀(K2O)的含量w1以質(zhì)量分?jǐn)?shù)%表示，按下式計算：中文（2）resultcalculation

Thecontentofpotassiumoxide(K2O)w1isexpressedasamassfraction%,andiscalculatedusingthefollowingformula:Eglish（3）實驗步驟

移取一定量溶液，加入EDTA溶液及酚酞指示液，在攪拌下逐滴加入氫氧化鈉溶液至紅色出現(xiàn)并過量1mL。加熱微沸15min(此時溶液應(yīng)保持紅色)。在攪拌下逐滴加入四苯硼鈉溶液，在流水中迅速冷卻至室溫并放置15min。先過濾上層清液，再用洗滌液轉(zhuǎn)移沉淀至過濾器中，用洗滌液洗滌沉淀，干燥稱量。中文（3）Procedure

Takeacertainamountofsamplesolution,addEDTAsolutionandphenolphthaleinindicatorsolution,andaddsodiumhydroxidesolutiondropwisewhilestirringuntilredappearsand1mLofexcesssodiumhydroxidesolutionisadded.Heatandslightlyboilfor15minutes(atthistime,thesolutionshouldremainred).Addsodiumtetraphenylboratesolutiondropwisewhilestirring,rapidlycooltoroomtemperatureinflowingwater,andletitstandfor15minutes.Firstfiltertheupperclearliquid,thentransfertheprecipitatetothefilterwithwashingsolution.Washtheprecipitatewithwashingsolution,dryit,andweighit.Eglish（1）方法原理在堿性條件下加熱消除試樣溶液中銨離子的干擾，加入乙二胺四乙酸二鈉(EDTA)消除其他陽離子的干擾，在微堿性介質(zhì)中，以過量的四苯硼酸鈉與鉀反應(yīng)生成四苯硼酸鉀沉淀，過濾，濾液中過量的四苯硼酸鈉以達(dá)旦黃作指示劑，用季銨鹽返滴至溶液由黃變成明顯的粉紅色2、四苯硼酸鈉容量法中文(1)MethodprincipleHeatunderalkalineconditionstoeliminatetheinterferenceofammoniumionsinthesamplesolution,andadddiso