Nyob rau hauv lub ntiaj teb tej yam yees siv ntawm chemistry,bariumyeej ib txwm nyiam cov neeg tshawb fawb nrog nws qhov tshwj xeeb ntxim nyiam thiab daim ntawv thov dav. Txawm hais tias qhov no silvery-dawb hlau ntsiab tsis yog dazzling li kub los yog nyiaj, nws plays ib tug indispensable luag hauj lwm nyob rau hauv ntau yam teb. Los ntawm cov cuab yeej precision hauv cov chaw tshawb fawb tshawb fawb mus rau cov ntaub ntawv tseem ceeb hauv kev tsim khoom mus rau kev kuaj cov tshuaj reagents hauv kev kho mob, barium tau sau cov lus dab neeg ntawm chemistry nrog nws cov khoom tshwj xeeb thiab kev ua haujlwm.
Thaum ntxov li xyoo 1602, Cassio Lauro, tus tsim khau hauv Italian nroog Porra, tau ci ib qho barite uas muaj barium sulfate nrog cov khoom siv hluav taws xob hauv kev sim thiab xav tsis thoob thaum pom tias nws tuaj yeem ci hauv qhov tsaus ntuj. Qhov kev tshawb pom no ua rau muaj kev txaus siab ntawm cov kws tshawb fawb thaum lub sijhawm, thiab lub pob zeb tau hu ua Porra pob zeb thiab tau los ua qhov tseem ceeb ntawm kev tshawb fawb los ntawm European chemists.
Txawm li cas los xij, nws yog Swedish chemist Scheele uas tau lees paub tias barium yog lub caij tshiab. Nws nrhiav tau barium oxide nyob rau hauv 1774 thiab hu ua "Baryta" (hnyav lub ntiaj teb). Nws tau kawm cov khoom no hauv qhov tob thiab ntseeg tias nws yog tsim los ntawm lub ntiaj teb tshiab (oxide) ua ke nrog sulfuric acid. Ob xyoos tom qab ntawd, nws tau ua tiav cov dej nitrate ntawm cov av tshiab no thiab tau txais cov oxide ntshiab. Txawm li cas los xij, txawm tias Scheele nrhiav pom cov oxide ntawm barium, nws tsis yog txog 1808 tias British chemist Davy tau ua tiav cov hlau barium los ntawm electrolyzing electrolyte ua los ntawm barite. Qhov kev tshawb pom no tau cim qhov kev lees paub ntawm barium raws li cov khoom siv hlau, thiab tseem qhib txoj kev taug kev ntawm daim ntawv thov barium hauv ntau qhov chaw.
Txij thaum ntawd los, tib neeg tau txuas ntxiv nkag siab txog barium. Cov kws tshawb fawb tau tshawb nrhiav qhov tsis paub tseeb ntawm qhov xwm txheej thiab txhawb kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis los ntawm kev kawm cov khoom thiab kev coj cwj pwm ntawm barium. Daim ntawv thov ntawm barium hauv kev tshawb fawb, kev lag luam, thiab kev kho mob kuj tau dhau los ua qhov dav, nqa kev yooj yim thiab kev nplij siab rau tib neeg lub neej.
Lub ntxim nyiam ntawm barium tsis yog tsuas yog nyob rau hauv nws cov practicality, tab sis kuj nyob rau hauv lub scientific paub tsis meej tom qab nws. Cov kws tshawb fawb tsis tu ncua tshawb nrhiav qhov tsis paub tseeb ntawm qhov xwm txheej thiab txhawb kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis los ntawm kev kawm cov khoom thiab kev coj cwj pwm ntawm barium. Nyob rau tib lub sijhawm, barium tseem nyob ntsiag to ua lub luag haujlwm hauv peb lub neej txhua hnub, nqa kev yooj yim thiab kev nplij siab rau peb lub neej. Cia peb pib ntawm txoj kev taug txuj kev nyuaj no ntawm kev tshawb nrhiav barium, nthuav tawm nws daim ntaub thaiv tsis meej, thiab txaus siab rau nws qhov tshwj xeeb ntxim nyiam. Hauv kab lus hauv qab no, peb yuav qhia meej txog cov khoom thiab kev siv ntawm barium, nrog rau nws lub luag haujlwm tseem ceeb hauv kev tshawb fawb, kev lag luam, thiab tshuaj. Kuv ntseeg tias los ntawm kev nyeem cov lus no, koj yuav nkag siab tob txog barium.
1. Daim ntawv thov ntawm Barium
Bariumyog ib hom tshuaj lom neeg. Nws yog ib tug silvery-dawb hlau uas muaj nyob rau hauv cov xwm nyob rau hauv daim ntawv ntawm ntau yam minerals. Hauv qab no yog qee qhov kev siv barium txhua hnub.
Hlawv thiab ci: Barium yog cov hlau reactive heev uas ua rau lub teeb ci ntsa iab thaum ntsib nrog ammonia lossis oxygen. Qhov no ua rau barium dav siv hauv kev lag luam xws li foob pob hluav taws, flares, thiab phosphor manufacturing.
Kev lag luam kho mob: Barium compounds kuj tau siv dav hauv kev lag luam kho mob. Cov zaub mov barium (xws li cov ntsiav tshuaj barium) yog siv rau hauv kev kuaj mob plab zom mov los pab cov kws kho mob saib xyuas kev ua haujlwm ntawm lub plab zom mov. Barium tebchaw kuj tau siv rau hauv qee yam kev kho mob hauv xov tooj cua, xws li xov tooj cua iodine rau kev kho cov thyroid kab mob.
Iav thiab ceramics: Barium tebchaw feem ntau yog siv rau hauv iav thiab ceramics vim lawv qhov zoo melting point thiab corrosion kuj. Barium compounds tuaj yeem txhim kho qhov hardness thiab lub zog ntawm ceramics thiab tuaj yeem muab qee cov khoom tshwj xeeb ntawm ceramics, xws li hluav taws xob rwb thaiv tsev thiab siab refractive index. Hlau alloys: Barium tuaj yeem tsim cov hlau nrog lwm cov hlau, thiab cov hlau no muaj qee yam khoom tshwj xeeb. Piv txwv li, barium alloys tuaj yeem ua rau cov ntsiab lus melting ntawm aluminium thiab magnesium alloys, ua rau lawv yooj yim rau kev ua thiab cam khwb cia. Tsis tas li ntawd, barium alloys nrog cov khoom sib nqus kuj tseem siv los ua cov roj teeb thiab cov khoom sib nqus.
Barium yog cov khoom siv tshuaj nrog cov cim tshuaj Ba thiab atomic naj npawb 56. Barium yog ib qho alkaline ntiaj teb hlau thiab nyob rau hauv pawg 6 ntawm lub sij hawm lub sij hawm, cov pab pawg neeg tseem ceeb.
2. Barium Physical Properties
Barium (Ba) yog lub ntiaj teb alkaline hlau
1. Cov tsos mob: Barium yog cov hlau mos, silvery-dawb nrog cov xim hlau txawv txawv thaum txiav.
2. Qhov ntom ntom: Barium muaj qhov ntom ntom ntom ntawm 3.5 g / cm³. Nws yog ib qho ntawm cov hlau denser hauv ntiaj teb.
3. Melting thiab boiling point: Barium muaj ib tug melting point ntawm txog 727 ° C thiab boiling point ntawm txog 1897 ° C.
4. Hardness: Barium yog ib tug kuj mos hlau nrog ib tug Mohs hardness txog 1.25 ntawm 20 degrees Celsius.
5. Conductivity: Barium yog ib tug zoo conductor ntawm hluav taws xob nrog ib tug high hluav taws xob conductivity.
6. Ductility: Txawm hais tias barium yog cov hlau mos, nws muaj qee qhov kev ductility thiab tuaj yeem ua tiav rau hauv cov ntawv nyias lossis cov xov hlau.
7. Kev ua tshuaj lom neeg: Barium tsis hnov tsw zoo nrog feem ntau cov hlau tsis muaj hlau thiab ntau cov hlau ntawm chav sov, tab sis nws tsim oxides ntawm qhov kub thiab txias. Nws tuaj yeem tsim cov tebchaw nrog ntau yam tsis yog xim hlau, xws li oxides, sulfides, thiab lwm yam.
8. Cov ntaub ntawv muaj nyob: Cov minerals uas muaj barium nyob rau hauv lub ntiaj teb crust, xws li barite (barium sulfate), thiab lwm yam. Barium kuj muaj nyob rau hauv daim ntawv ntawm hydrates, oxides, carbonates, thiab lwm yam nyob rau hauv cov xwm.
9. Radioactivity: Barium muaj ntau yam xov tooj cua isotopes, ntawm cov barium-133 yog ib hom xov tooj cua isotope siv nyob rau hauv cov duab kho mob thiab kev siv tshuaj nuclear.
10. Daim ntaub ntawv: Barium tebchaw yog dav siv nyob rau hauv kev lag luam, xws li iav, roj hmab, tshuaj lom neeg kev lag luam catalysts, electron tubes, thiab lwm yam. Nws sulfate feem ntau yog siv los ua tus neeg sawv cev sib txawv hauv kev kuaj mob. Barium yog ib qho tseem ceeb ntawm cov hlau uas nws cov khoom ua rau nws siv dav hauv ntau lub teb.
3. Cov khoom siv tshuaj ntawm barium
Cov khoom siv hlau: Barium yog cov khoom siv hlau nrog lub ntsej muag dawb-dawb thiab zoo hluav taws xob conductivity.
Qhov ntom ntom thiab melting point: Barium yog qhov tseem ceeb me ntsis uas muaj qhov ntom ntawm 3.51 g / cm3. Barium muaj qhov qis melting ntawm li 727 degrees Celsius (1341 degrees Fahrenheit).
Reactivity: Barium reacts sai nrog feem ntau cov khoom uas tsis yog-hlau, tshwj xeeb tshaj yog nrog halogens (xws li chlorine thiab bromine), los tsim cov khoom sib txuas barium. Piv txwv li, barium reacts nrog chlorine los tsim barium chloride.
Oxidizability: Barium tuaj yeem oxidized los ua barium oxide. Barium oxide yog dav siv nyob rau hauv kev lag luam xws li hlau smelting thiab iav manufacturing.
Kev ua haujlwm siab: Barium muaj cov tshuaj lom neeg ua haujlwm siab thiab yooj yim reacts nrog dej kom tso hydrogen thiab tsim barium hydroxide.
4. Cov khoom siv roj ntsha ntawm barium
Lub luag haujlwm thiab kev lom neeg ntawm barium hauv cov kab mob tsis nkag siab tag nrho, tab sis nws paub tias barium muaj qee yam tshuaj lom rau cov kab mob.
Kev noj haus: Cov tib neeg feem ntau noj barium los ntawm zaub mov thiab dej haus. Qee cov khoom noj yuav muaj cov kab mob barium, xws li nplej, nqaij, thiab khoom noj siv mis. Tsis tas li ntawd, dej hauv av qee zaum muaj ntau dua ntawm barium.
Kev nqus dej lom thiab cov metabolism: Barium tuaj yeem nqus tau los ntawm cov kab mob thiab faib rau hauv lub cev los ntawm cov ntshav ncig. Barium feem ntau accumulates nyob rau hauv ob lub raum thiab cov pob txha, tshwj xeeb tshaj yog nyob rau hauv ntau dua concentration nyob rau hauv cov pob txha.
Kev ua haujlwm lom neeg: Barium tseem tsis tau pom tias muaj cov haujlwm tseem ceeb hauv lub cev hauv cov kab mob. Yog li ntawd, kev ua haujlwm lom neeg ntawm barium tseem muaj teeb meem.
5. Cov khoom siv roj ntsha ntawm barium
Toxicity: Cov ntsiab lus siab ntawm barium ions lossis barium compounds yog tshuaj lom rau tib neeg lub cev. Kev noj ntau dhau ntawm barium tuaj yeem ua rau muaj cov tsos mob lom, xws li ntuav, raws plab, cov leeg tsis muaj zog, arrhythmia, thiab lwm yam. Cov tshuaj lom hnyav yuav ua rau cov hlab ntsha puas, lub raum puas thiab teeb meem plawv.
Pob txha pob txha: Barium tuaj yeem khaws cov pob txha hauv tib neeg lub cev, tshwj xeeb tshaj yog cov laus. Kev cuam tshuam ntev ntev ntawm barium siab tuaj yeem ua rau cov kab mob hauv pob txha xws li pob txha pob txha. Cov kab mob plawv: Barium, zoo li sodium, tuaj yeem cuam tshuam nrog ion tshuav nyiaj li cas thiab hluav taws xob ua haujlwm, cuam tshuam rau lub plawv. Kev noj ntau dhau ntawm barium tuaj yeem ua rau lub plawv dhia tsis zoo thiab ua rau muaj kev pheej hmoo ntawm plawv nres.
Carcinogenicity: Txawm hais tias tseem muaj kev tsis sib haum xeeb txog cov carcinogenicity ntawm barium, qee cov kev tshawb fawb tau pom tias qhov ntev ntev ntawm cov khoom siv barium yuav ua rau muaj kev pheej hmoo ntawm qee yam qog nqaij hlav, xws li mob qog noj ntshav thiab mob qog noj ntshav. Vim muaj cov tshuaj lom thiab muaj peev xwm txaus ntshai ntawm barium, tib neeg yuav tsum tau ceev faj kom tsis txhob noj ntau dhau lossis raug rau lub sijhawm ntev ntawm cov ntsiab lus siab ntawm barium. Barium concentrations hauv dej haus thiab zaub mov yuav tsum tau saib xyuas thiab tswj kom tiv thaiv tib neeg kev noj qab haus huv. Yog tias koj xav tias muaj tshuaj lom lossis muaj cov tsos mob ntsig txog, thov mus ntsib kws kho mob tam sim ntawd.
6. Barium hauv Xwm
Barium minerals: Barium tuaj yeem pom nyob rau hauv lub ntiaj teb crust nyob rau hauv daim ntawv ntawm cov minerals. Qee cov khoom siv barium muaj xws li barite thiab witherite. Cov ore no feem ntau pom nrog lwm cov zaub mov, xws li txhuas, zinc, thiab nyiaj.
Dissolved hauv av thiab pob zeb: Barium tuaj yeem pom hauv av thiab pob zeb hauv lub xeev yaj. Cov dej hauv av muaj cov lej ntawm cov kuab lom barium, thiab nws cov concentration nyob ntawm cov xwm txheej geological thiab cov tshuaj lom neeg ntawm lub cev dej.
Barium ntsev: Barium tuaj yeem tsim cov ntsev sib txawv, xws li barium chloride, barium nitrate, thiab barium carbonate. Cov tebchaw no tuaj yeem pom nyob rau hauv qhov chaw raws li cov zaub mov ntuj.
Cov ntsiab lus hauv av: Barium tuaj yeem pom nyob rau hauv cov av hauv ntau hom, qee qhov tuaj yeem los ntawm cov ntxhia hauv ntuj lossis cov pob zeb tawg. Barium feem ntau tam sim no nyob rau hauv qis concentration hauv av, tab sis tej zaum yuav muaj nyob rau hauv siab concentrations nyob rau hauv tej cheeb tsam.
Nws yuav tsum tau muab sau tseg hais tias lub xub ntiag thiab cov ntsiab lus ntawm barium yuav txawv nyob rau hauv txawv geological ib puag ncig thiab cheeb tsam, yog li tej thaj chaw thiab geological tej yam kev mob yuav tsum tau xav txog thaum tham txog barium.
7. Barium mining thiab ntau lawm
Cov txheej txheem mining thiab kev npaj ntawm barium feem ntau suav nrog cov kauj ruam hauv qab no:
1. Mining ntawm barium ore: Cov pob zeb tseem ceeb ntawm barium ore yog barite, tseem hu ua barium sulfate. Nws feem ntau pom nyob rau hauv lub ntiaj teb crust thiab yog dav faib nyob rau hauv pob zeb thiab deposits nyob rau hauv lub ntiaj teb no. Mining feem ntau yog blasting, mining, crushing thiab grading ntawm ore kom tau ore muaj barium sulfate.
2. Kev npaj cov concentrate: Extracting barium los ntawm barium ore yuav tsum tau concentrate kev kho cov ore. Kev npaj siab feem ntau suav nrog kev xaiv tes thiab cov kauj ruam flotation kom tshem tawm cov impurities thiab tau txais cov ore uas muaj ntau tshaj 96% barium sulfate.
3. Kev npaj ntawm barium sulfate: Cov concentrate yog raug rau cov kauj ruam xws li hlau thiab silicon tshem tawm kom thaum kawg tau barium sulfate (BaSO4).
4. Kev npaj barium sulfide: Txhawm rau npaj barium los ntawm barium sulfate, nws yog ib qho tsim nyog los hloov barium sulfate rau hauv barium sulfide, los yog cov tshauv dub. Barium sulfate ore hmoov nrog ib qho me me ntawm tsawg dua 20 mesh feem ntau yog tov nrog cov thee lossis roj av coke hmoov hauv qhov hnyav piv ntawm 4: 1. Cov sib tov yog roasted ntawm 1100 ℃ nyob rau hauv lub reverberatory rauv, thiab barium sulfate yog txo mus rau barium sulfide.
5. Dissolving barium sulfide: Barium sulfide tov ntawm barium sulfate tuaj yeem tau los ntawm dej kub leaching.
6. Kev npaj barium oxide: Txhawm rau hloov barium sulfide rau hauv barium oxide, sodium carbonate lossis carbon dioxide feem ntau yog ntxiv rau cov tshuaj barium sulfide. Tom qab sib tov barium carbonate thiab carbon hmoov, calcination ntawm siab tshaj 800 ℃ tuaj yeem tsim barium oxide.
7. Kev ua kom txias thiab ua haujlwm: Nws yuav tsum tau muab sau tseg tias barium oxide oxidizes tsim barium peroxide ntawm 500-700 ℃, thiab barium peroxide tuaj yeem decompose los ua barium oxide ntawm 700-800 ℃. Txhawm rau zam kev tsim cov barium peroxide, cov khoom calcined yuav tsum tau txias los yog quenched nyob rau hauv kev tiv thaiv ntawm inert roj.
Cov saum toj no yog qhov dav dav mining thiab kev npaj ntawm barium. Cov txheej txheem no yuav txawv nyob ntawm cov txheej txheem kev lag luam thiab cov cuab yeej siv, tab sis lub hauv paus ntsiab lus tseem zoo ib yam. Barium yog ib qho tseem ceeb ntawm kev lag luam hlau siv nyob rau hauv ntau yam kev siv, nrog rau kev lag luam tshuaj, tshuaj, electronics, thiab lwm yam.
8. Cov kev tshawb nrhiav pom zoo rau barium
Barium yog ib qho khoom siv uas feem ntau siv rau hauv ntau yam kev lag luam thiab kev tshawb fawb. Nyob rau hauv analytical chemistry, cov txheej txheem rau kev kuaj xyuas barium feem ntau suav nrog kev tshuaj xyuas zoo thiab kev tshuaj xyuas ntau. Cov hauv qab no yog cov lus qhia ntxaws ntxaws rau cov kev siv ntau tshaj plaws rau kev tshawb nrhiav barium:
1. Nplaim Atomic Absorption Spectrometry (FAAS): Qhov no yog ib txoj hauv kev uas feem ntau siv ntau qhov kev soj ntsuam kom haum rau cov qauv uas muaj ntau dua. Cov qauv tov yog txau rau hauv cov nplaim taws, thiab cov barium atoms nqus lub teeb ntawm ib lub wavelength tshwj xeeb. Qhov kev siv ntawm lub teeb absorbed yog ntsuas thiab yog proportional rau lub concentration ntawm barium.
2. Nplaim Atomic Emission Spectrometry (FAES): Txoj kev no tshawb pom barium los ntawm kev txau cov qauv tshuaj rau hauv cov nplaim taws, ua rau cov barium atoms tawm lub teeb ntawm ib lub wavelength tshwj xeeb. Piv nrog FAAS, FAES feem ntau yog siv los kuaj xyuas qhov qis dua ntawm barium.
3. Atomic Fluorescence Spectrometry (AAS): Txoj kev no zoo ib yam li FAAS, tab sis siv lub fluorescence spectrometer los xyuas seb muaj barium. Nws tuaj yeem siv los ntsuas cov lej ntawm barium.
4. Ion Chromatography: Txoj kev no yog tsim rau kev soj ntsuam ntawm barium hauv cov qauv dej. Barium ions raug cais thiab kuaj pom los ntawm ion chromatograph. Nws tuaj yeem siv los ntsuas qhov barium concentration hauv cov qauv dej.
5. X-ray Fluorescence Spectrometry (XRF): Qhov no yog ib qho kev ntsuas tsis muaj kev puas tsuaj uas tsim nyog rau kev tshawb nrhiav barium hauv cov khoom kuaj. Tom qab cov qauv zoo siab los ntawm X-rays, barium atoms emit tshwj xeeb fluorescence, thiab cov ntsiab lus barium yog txiav txim los ntawm kev ntsuas qhov fluorescence siv.
6. Mass Spectrometry: Mass spectrometry tuaj yeem siv los txiav txim siab cov isotopic muaj pes tsawg leeg ntawm barium thiab txiav txim siab cov ntsiab lus barium. Txoj kev no feem ntau yog siv rau kev soj ntsuam siab-rhiab heev thiab tuaj yeem kuaj pom qhov tsis tshua muaj siab ntawm barium.
Cov saum toj no yog qee txoj kev siv los kuaj xyuas barium. Txoj kev xaiv tshwj xeeb yog nyob ntawm qhov xwm txheej ntawm tus qauv, qhov concentration ntau ntawm barium, thiab lub hom phiaj ntawm kev tsom xam. Yog tias koj xav tau cov ntaub ntawv ntxiv lossis muaj lus nug, thov hu rau kuv paub. Cov txheej txheem no tau siv dav hauv kev sim thiab kev siv hauv kev lag luam kom raug thiab ntseeg tau ntsuas thiab kuaj pom muaj thiab concentration ntawm barium. Txoj kev siv tshwj xeeb yog nyob ntawm hom qauv uas yuav tsum tau ntsuas, qhov ntau ntawm cov ntsiab lus barium, thiab lub hom phiaj tshwj xeeb ntawm kev tsom xam.
9. Atomic absorption method rau kev ntsuas calcium
Hauv kev ntsuas lub ntsiab lus, atomic absorption method muaj qhov raug siab thiab rhiab heev, thiab muab txoj hauv kev zoo rau kev kawm cov khoom siv tshuaj, cov khoom sib xyaw thiab cov ntsiab lus. Cov kauj ruam tshwj xeeb yog raws li hauv qab no: Npaj cov qauv mus kuaj. Npaj cov qauv coj los ntsuas rau hauv cov tshuaj, uas feem ntau yuav tsum tau zom nrog cov kua qaub sib xyaw rau kev ntsuas tom ntej.Xaiv qhov tsim nyog atomic absorption spectrometer. Raws li cov khoom ntawm cov qauv yuav tsum tau kuaj thiab qhov ntau ntawm cov ntsiab lus yuav tsum tau ntsuas, xaiv qhov haum atomic absorption spectrometer.
Kho qhov ntsuas ntawm atomic absorption spectrometer. Raws li cov khoom yuav tsum tau kuaj thiab cov qauv ntsuas, kho qhov tsis haum ntawm atomic absorption spectrometer, nrog rau lub teeb ci, atomizer, ntes, thiab lwm yam.
Ntsuas qhov nqus ntawm cov khoom. Muab cov qauv mus kuaj rau hauv lub atomizer, thiab emit lub teeb hluav taws xob ntawm ib lub wavelength tshwj xeeb los ntawm lub teeb ci. Lub caij yuav tsum tau kuaj yuav nqus cov hluav taws xob hluav taws xob no thiab tsim lub zog hloov pauv. Ntsuas qhov absorbance ntawm cov nyiaj ntawm lub tshuab ntes. Xam cov ntsiab lus ntawm lub caij. Cov ntsiab lus ntawm lub caij yog xam raws li qhov absorbance thiab tus qauv nkhaus. Cov hauv qab no yog cov kev txwv tshwj xeeb uas siv los ntawm ib qho cuab yeej los ntsuas cov ntsiab lus.
Txuj: high-purity BaCO3 los yog BaCl2 · 2H2O.
Txoj kev: Ua kom hnyav 0.1778g BaCl2·2H2O, yaj hauv dej me me, thiab ua kom raug txog li 100mL. Ba concentration hauv cov tshuaj no yog 1000μg / mL. Khaws rau hauv lub raj mis polyethylene kom deb ntawm lub teeb.
Hom nplaim: cua-acetylene, nplua nuj nplaim.
Kev ntsuas ntsuas: Wavelength (nm) 553.6
Spectral bandwidth (nm) 0.2
Lim coefficient 0.3
Pom zoo lub teeb tam sim no (mA) 5
Tsis zoo siab voltage (v) 393.00
Qhov siab ntawm lub taub hau burner (mm) 10
Lub sijhawm sib xyaw ua ke (S) 3
Cua siab thiab ntws (MPa, mL / min) 0.24
Acetylene siab thiab ntws (MPa, mL / min) 0.05, 2200
Linear ntau (μg / mL) 3 ~ 400
Linear correlation coefficient 0.9967
Tus cwj pwm concentration (μg / mL) 7.333
Kev kuaj pom qhov txwv (μg / mL) 1.0RSD (%) 0.27
Txoj kev suav Nruam txoj kev
Cov kua qaub acidity 0.5% HNO3
Daim ntawv xeem:
| NO | Kev ntsuas khoom | Qauv No. | Abs | concentration | SD |
| 1 | Qauv qauv | Ba1 | 0.000 | 0.000 | 0.0002 |
| 2 | Qauv qauv | Ba 2 | 0.030 Nws | 50.000 | 0.0007 Nws |
| 3 | Qauv qauv | Ba 3 | 0.064 ib | 100.000 | 0.0004 |
| 4 | Qauv qauv | Ba4 | 0.121 ib | 200.000 | 0.0016 |
| 5 | Qauv qauv | Ba5 | 0.176 ib | 300.000 | 0.0011 ib |
| 6 | Qauv qauv | Ba6 | 0.240 Nws | 400.000 | 0.0012 ib |
Calibration nkhaus:
nplaim hom: nitrous oxide-acetylene, nplua nuj nplaim
.Tsev tsis muaj: Wavelength: 553.6
Spectral bandwidth (nm) 0.2
Lim coefficient 0.6
Pom zoo lub teeb tam sim no (mA) 6.0
Tsis zoo siab voltage (v) 374.5
Qhov siab ntawm combustion taub hau (mm) 13
Lub sijhawm sib xyaw ua ke (S) 3
Cua siab thiab ntws (MP, mL / min) 0.25, 5100
Nitrous oxide siab thiab ntws (MP, mL / min) 0.1, 5300
Acetylene siab thiab ntws (MP, mL / min) 0.1, 4600
Linear correlation coefficient 0.9998
Tus cwj pwm concentration (μg / mL) 0.379
Txoj kev suav Nruam txoj kev
Cov kua qaub acidity 0.5% HNO3
Daim ntawv xeem:
| NO | Kev ntsuas khoom | Qauv No. | Abs | concentration | SD | RSD [%] |
| 1 | Qauv qauv | Ba1 | 0.005 ib | 0.0000 | 0.0030 Nws | 64.8409 ib |
| 2 | Qauv qauv | Ba 2 | 0.131 ib | 10.0000 | 0.0012 ib | 0.8817 ib |
| 3 | Qauv qauv | Ba 3 | 0.251 ib | 20.0000 | 0.0061 ib | 2.4406 ib |
| 4 | Qauv qauv | Ba4 | 0.366 ib | 30.0000 | 0.0022 ib | 0.5922 ib |
| 5 | Qauv qauv | Ba5 | 0.480 ib | 40.0000 | 0.0139 ib | 2.9017 ib |
Calibration nkhaus:
Kev cuam tshuam: Barium raug cuam tshuam los ntawm phosphate, silicon thiab txhuas hauv cov nplaim hluav taws xob-acetylene, tab sis cov kev cuam tshuam no tuaj yeem kov yeej cov nplaim hluav taws xob nitrous oxide-acetylene. 80% ntawm Ba yog ionized nyob rau hauv nitrous oxide-acetylene nplaim, yog li 2000μg / mL ntawm K + yuav tsum tau ntxiv rau tus qauv thiab cov qauv kev daws teeb meem los suppress ionization thiab txhim kho rhiab heev.Barium, qhov no seemingly zoo tib yam tab sis txawv tshaj plaw tshuaj, yeej ib txwm ua si nws. lub luag haujlwm hauv peb lub neej ntsiag to. Los ntawm cov cuab yeej precision hauv cov chaw tshawb fawb tshawb fawb mus rau cov khoom siv raw hauv kev tsim khoom, mus rau cov tshuaj tiv thaiv kab mob hauv kev kho mob, barium tau muab kev txhawb nqa tseem ceeb rau ntau qhov chaw nrog nws cov khoom tshwj xeeb.
Txawm li cas los xij, ib yam li txhua lub npib muaj ob sab, qee qhov sib txuas ntawm barium kuj yog tshuaj lom. Yog li ntawd, thaum siv barium, peb yuav tsum tau ceev faj kom muaj kev nyab xeeb siv thiab tsis txhob tsim kev puas tsuaj rau ib puag ncig thiab tib neeg lub cev.
Saib rov qab rau txoj kev tshawb nrhiav ntawm barium, peb tsis tuaj yeem pab tab sis hnia ntawm nws qhov kev paub tsis meej thiab ntxim nyiam. Nws tsis yog tsuas yog cov khoom tshawb fawb ntawm cov kws tshawb fawb, tab sis kuj yog tus pab cuam muaj zog ntawm engineers, thiab ib qho chaw ci ntsa iab hauv kev kho mob. Saib mus rau yav tom ntej, peb cia siab tias barium yuav txuas ntxiv ua rau muaj kev xav tsis thoob thiab kev ua tiav rau noob neej, thiab pab txhawb kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab zej zog.Txawm hais tias qhov kawg ntawm tsab xov xwm no, peb yuav tsis tuaj yeem ua kom pom qhov kev thov rov hais dua. barium nrog cov lus zoo nkauj, tab sis kuv ntseeg tias dhau los ntawm kev qhia dav dav ntawm nws cov khoom, kev siv thiab kev nyab xeeb, cov neeg nyeem muaj kev nkag siab tob txog barium. Cia peb tos ntsoov rau qhov ua tau zoo ntawm barium yav tom ntej thiab pab txhawb ntxiv rau kev vam meej thiab kev loj hlob ntawm noob neej.
Yog xav paub ntxiv los yog xav nug siab purity 99.9% barium hlau, txais tos hu rau peb hauv qab no:
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Post lub sij hawm: Nov-15-2024