kuaj cov qauv rau D4, D5, thiab D6 hauv silicone

Cov qauv suav nrog rau D4, D5, thiab D6 hauv silicone
GB 4806.2: Tus qauv tswj rau cov ntsiab lus ntawm cov tshuaj tsis haum rau hauv silicone pacifiers yog GB 4806.2. Txoj kev tshuaj ntsuam xyuas yog raws li Tshooj 8.9 ntawm GB 28482, "Kev Nyab Xeeb Kev Nyab Xeeb rau Cov Me Nyuam thiab Cov Me Nyuam Me Me Pacifiers", uas tau teev tseg tias cov ntsiab lus ntawm cov khoom tsis sib xws yuav tsum tsis pub tshaj 0.5% (m / m). Cov qauv no txwv tsis pub cov organic sib txuas uas muaj nyob hauv silicone, suav nrog D4 thiab D5.
GB 29204-2012: Food Safety Standard Food Additive Silicone, uas teev cov kev cai, kev xeem txoj kev, soj ntsuam cov cai, thiab cim, ntim, tsheb thauj mus los thiab cia cov zaub mov additive silicone.
HG/T 2354-2010: Chromatographic silica gel tus qauv, uas qhia txog cov kev xav tau, kev sim, kev soj ntsuam xyuas, cim, ntim, kev thauj mus los thiab khaws cia ntawm chromatography silica gel. Nws muaj feem xyuam rau cov xim dawb amorphous nrog ib qho chaw tshwj xeeb thiab qhov pore ntim tsim los ntawm cov tshuaj tiv thaiv ntawm sodium silicate thiab sulfuric acid. Nws yog tsuas yog siv nyob rau hauv kev lag luam tshuaj raws li ib tug adsorbent, desiccant thiab catalyst cab kuj rau chromatography silica gel.
Cov qauv kev lag luam ntsig txog
ZDHC: ZDHC (Zero Discharge of Hazardous Chemicals) muab cov khoom lag luam thiab cov chaw muag khoom nrog cov npe tseem ceeb ntawm cov khoom txwv hauv kev tsim khoom (MRSL), suav nrog kev tswj hwm cov cai rau D4, D5, thiab D6, kom ntseeg tau tias muaj kev nyab xeeb thiab ua raws li kev npaj tshuaj thiab tshuaj raw khoom. cov ntaub ntawv siv hauv kev tsim khoom, txhawb cov pob tshab hauv cov saw hlau, tshem tawm cov khoom phom sij los ntawm qhov chaw, thiab txo qhov kev pheej hmoo ntawm cov khoom tsis ua raws li cov khoom tiav. theem.
ISO: Txawm hais tias tsis muaj tus qauv tshwj xeeb rau D4, D5, thiab D6 hauv silica gel, qee cov qauv kev ntsuas cov khoom siv dav dav, xws li ISO 17234-1: 2010 Cov txheej txheem tshawb nrhiav thiab cov ntsiab lus tau teev tseg hauv ASTM D5508-94 a (2018) kuj tuaj yeem siv los ua cov ntaub ntawv siv rau kev tshawb nrhiav thiab tshuaj xyuas cov khoom tsis zoo uas yuav muaj nyob hauv silica gel.
ASTM: Kuj tsis muaj ib tus qauv tshwj xeeb rau D4, D5, thiab D6 hauv silica gel, tab sis muaj qee qhov kev ntsuas cov qauv ntsuas, xws li ASTM D5508-94a (2018), uas tuaj yeem muab cov qauv siv thaum kuaj xyuas cov khoom tsis zoo hauv silica gel.
Cov txheej txheem xeem
Gas chromatography-mass spectrometry (GC-MS): Qhov no yog ib qho ntawm cov kev siv feem ntau los kuaj xyuas cov ntsiab lus ntawm D4, D5, thiab D6 hauv silica gel. Lub hauv paus ntsiab lus yog ua ntej cais cov organic Cheebtsam hauv cov qauv silica gel los ntawm cov pa roj chromatography, thiab tom qab ntawd siv lub tshuab ntsuas huab cua los ua qhov kev soj ntsuam zoo thiab muaj nuj nqis ntawm cov khoom sib cais, txhawm rau txiav txim siab cov ntsiab lus ntawm D4, D5, thiab D6. Txoj kev no muaj qhov zoo ntawm qhov siab rhiab heev, kev xaiv siab, thiab qhov tseeb siab, thiab tuaj yeem kuaj xyuas cov hom phiaj qis heev.
Headspace txhaj tshuab: feem ntau ua ke nrog headspace txhaj technology, uas yog, tso cov silica gel qauv nyob rau hauv lub kaw lub taub hau lub raj mis, nyob rau hauv tej yam kub thiab lub sij hawm tej yam kev mob, cov volatile organic tebchaw xws li D4, D5, thiab D6 nyob rau hauv cov qauv yog volatilized rau cov roj theem qhov chaw hauv lub raj mis, thiab tom qab ntawd cov roj sab saud raug coj mus rau GC-MS tsom xam. Txoj kev no tuaj yeem zam qhov cuam tshuam ntawm cov qauv matrix ntawm cov txiaj ntsig kev soj ntsuam, txhim kho qhov tseeb thiab kev ntseeg siab ntawm kev kuaj pom, thiab tshwj xeeb tshaj yog tsim rau kev tshawb nrhiav cov organic tebchaw nyob rau hauv siab molecular polymer cov ntaub ntawv xws li silica gel.