Technical Qib vs Food Grade Sodium Fluoride: Purity Standards and Use Differences

Sodium fluoride muaj nyob rau hauv ob qib thawj: qib kev kawm thiab qib zaub mov, txhua tus haum rau cov kev lag luam tshwj xeeb thiab cov neeg siv khoom siv raws li purity, impurity theem, thiab cov qauv kev nyab xeeb. Rau cov neeg siv khoom thoob ntiaj teb thiab cov neeg siv khoom lag luam, kev nkag siab txog qhov sib txawv ntawm cov qauv purity thiab kev siv yog qhov tseem ceeb rau kev xaiv cov qib zoo ntawm sodium fluoride rau cov kev xav tau tshwj xeeb, ua kom muaj kev ua raws li cov cai thiab kev ua haujlwm zoo.

 

Cov qib kawm txuj ci sodium fluoride yog qib siv ntau tshaj plaws, nrog rau purity ntau ntawm 98-99%. Nws muaj cov impurities me me, xws li sodium carbonate, sodium hydroxide, thiab cov hlau hnyav (cov hlau lead tsawg dua lossis sib npaug li 10 ppm, arsenic Tsawg dua lossis sib npaug li 5 ppm), thiab feem ntau yog siv rau hauv cov ntawv thov kev lag luam uas tsis tas yuav tsum muaj kev purity siab thiab nruj nruj. Qib no yog tus nqi - siv tau thiab dav, ua rau nws haum rau kev siv loj - nplai.

 

Cov ntawv thov tseem ceeb ntawm qib kawm qib sodium fluoride suav nrog kev kho dej (cov dej khib nyiab hauv kev lag luam thiab cov dej haus hauv nroog), hlau smelting (raws li tus neeg sawv cev fluxing), iav ntau lawm (raws li flux thiab opacifier), thiab tshuaj tua kab. Nws kuj tseem siv los tsim lwm cov tshuaj fluoride, xws li sodium silicofluoride, thiab hauv cov khoom siv hlau kom tshem tawm cov oxide txheej.

 

Khoom noj khoom haus qib sodium fluoride muaj qib purity siab dua (Ntau dua lossis sib npaug li 99.5%) thiab txwv tsis pub muaj kev tsis huv, ua rau nws muaj kev nyab xeeb rau kev siv khoom noj, dej haus, thiab khoom siv kho hniav. Heavy hlau impurities raug txwv kom tsawg dua los yog sib npaug li 1 ppm ( txhuas, arsenic, cadmium), thiab lwm yam impurities xws li sodium carbonate thiab dej insoluble teeb meem tsawg dua los yog sib npaug li 0.1%. Qib no yuav tsum ua kom tau raws li cov kev cai ntawm lub koom haum tswj hwm thoob ntiaj teb, xws li FDA (US Food and Drug Administration) thiab EU Food Safety Authority (EFSA), kom ntseeg tau tias nws tsis yog - tshuaj lom thiab nyab xeeb rau tib neeg noj.

 

Khoom noj khoom haus qib sodium fluoride feem ntau yog siv los tsim cov tshuaj txhuam hniav, tshuaj ntxuav qhov ncauj, thiab lwm yam khoom siv kho hniav, qhov chaw uas nws muab cov tshuaj fluoride ions ntxiv dag zog rau cov hniav enamel thiab tiv thaiv cov hniav lwj. Nws kuj tseem siv los ua zaub mov ntxiv (E541) hauv cov khoom me me los txhawb cov khoom noj khoom haus nrog cov tshuaj fluoride, tshwj xeeb tshaj yog nyob rau thaj tsam uas tsis muaj fluoride ntau. Tsis tas li ntawd, nws yog siv nyob rau hauv kev lag luam kws tshuaj raws li ib tug raw khoom rau fluoride-cov tshuaj, xws li cov siv los kho pob txha.

 

Qhov sib txawv tseem ceeb ntawm qib kev kawm thiab qib zaub mov sodium fluoride yog nyob rau hauv purity, impurity txwv, thiab npaj siv. Cov qib txuj ci tsim nyog rau kev siv hauv kev lag luam, thaum qib zaub mov xav tau rau cov khoom lag luam uas tuaj yeem cuam tshuam ncaj qha rau tib neeg lub cev. Rau cov neeg xa khoom, muab ob qib tso cai rau lawv ua kom haum rau ntau yam ntawm cov neeg yuav khoom xav tau, los ntawm cov tuam txhab lag luam mus rau cov tuam txhab zaub mov thiab tshuaj. Los ntawm kev nkag siab txog qhov sib txawv no, cov neeg yuav khoom tuaj yeem xaiv qhov zoo tshaj plawssodium fluorideqib rau lawv daim ntawv thov tshwj xeeb, ua kom muaj kev ua raws cai, kev nyab xeeb, thiab kev ua haujlwm.