Kev tshawb fawb yog qhov xav tau ntawm kev siv citric acid hauv e-kua kom nkag siab zoo dua nws lub peev xwm los tsim cov anhydrides uas muaj peev xwm ua rau muaj kev phom sij hauv cov pa.
Citric acid tshwm sim ntuj tsim nyob rau hauv lub cev thiab "feem ntau lees paub tias muaj kev nyab xeeb" hauv Tebchaws Meskas rau kev siv rau hauv cov khoom siv kho mob. Txawm li cas los xij, kev rhuav tshem ntawm citric acid thermal yuav tshwm sim ntawm qhov kub ua haujlwm ntawm qee cov khoom siv vaping. Ntawm li ntawm 175-203 ° C, citric acid tuaj yeem rhuav tshem los ua citraconic anhydride thiab nws cov isomeric itaconic anhydride.
Cov anhydrides no yog cov tshuaj ua rau ua pa tsis taus - cov tshuaj uas, thaum nqus pa, tuaj yeem ua rau muaj kev tsis haum tshuaj xws li cov tsos mob ntawm tus mob ua xua rau paj ntoos mus rau anaphylactic shock.
Cov kws tshawb fawb ntawm British American Tobacco siv cov roj chromatography ua ke nrog lub sijhawm-ntawm-flight mass spectrometry los tshuaj xyuas cov pa uas tsim tawm thaum e-kua uas muaj citric acid raug cua sov hauv lub tshuab vaping. Lub cuab yeej siv yog thawj tiam luam yeeb hluav taws xob (zoo li luam yeeb). Cov kws tshawb fawb tau ntsuas tau qhov ntau ntawm anhydride hauv cov pa.
Cov txiaj ntsig tau nthuav tawm hnub no ntawm lub rooj sib tham txhua xyoo ntawm Nicotine thiab Tobacco Research Association hauv Florence, Ltalis.
"Citric acid hauv e-kua tuaj yeem ua rau muaj cov citraconia thiab / lossis itaconic anhydride ntau hauv cov pa luam yeeb, nyob ntawm lub cuab yeej," Dr. Sandra Costigan, Tus Thawj Coj Tshuaj Lom ntawm Vaping Products hais.
"Txawm li cas los xij, peb ntseeg hais tias yuav tsum siv cov tsw qab kom zoo thiab peb tau tshem tawm qee cov tsw qab hauv peb cov khoom." tau tshawb nrhiav ua ntej cov roj raug muag, "Costigan hais.
Muaj coob tus neeg hauv zej zog kev noj qab haus huv pej xeem ntseeg tias cov luam yeeb hluav taws xob muaj peev xwm txo tau qhov cuam tshuam rau kev noj qab haus huv pej xeem los ntawm kev haus luam yeeb. Public Health England, lub koom haum ua haujlwm ntawm UK Department of Health, nyuam qhuav tshaj tawm daim ntawv tshaj tawm hais tias kev siv luam yeeb hluav taws xob kwv yees li 95% muaj kev nyab xeeb dua li kev haus luam yeeb. Royal College of Physicians tau hais tias pej xeem tuaj yeem ntseeg siab tias cov luam yeeb hluav taws xob muaj kev nyab xeeb dua li kev haus luam yeeb thiab yuav tsum tau txhawb nqa dav dav ua lwm txoj hauv kev rau cov luam yeeb.
Yog tias koj ntsib teeb meem sau tsis raug, tsis raug, lossis xav xa daim ntawv thov kom hloov kho cov ntsiab lus ntawm nplooj ntawv no, thov siv daim foos no. Yog tias muaj lus nug dav dav, thov siv peb daim foos tiv tauj. Yog xav tau cov lus taw qhia dav dav, thov siv ntu lus tawm tswv yim rau pej xeem hauv qab no (cov lus pom zoo thov).
Koj cov lus taw qhia tseem ceeb heev rau peb. Txawm li cas los xij, vim muaj ntau cov lus xa tuaj, peb tsis tuaj yeem lav tias txhua tus yuav teb koj.
Koj qhov chaw nyob email tsuas yog siv los qhia rau cov neeg tau txais paub tias leej twg xa email. Koj qhov chaw nyob lossis tus neeg tau txais qhov chaw nyob yuav tsis raug siv rau lwm yam hom phiaj. Cov ntaub ntawv koj sau yuav tshwm sim hauv koj tus email thiab Medical Xpress yuav tsis khaws cia rau hauv txhua daim ntawv.
Tau txais cov xov xwm tshiab txhua lub lim tiam thiab/lossis txhua hnub hauv koj lub inbox. Koj tuaj yeem tshem tawm koj cov ntaub ntawv txhua lub sijhawm thiab peb yuav tsis qhia koj cov ntaub ntawv rau cov neeg thib peb.
Lub vas sab no siv cov cookies los pab txhawb kev mus los, tshuaj xyuas koj txoj kev siv peb cov kev pabcuam, sau cov ntaub ntawv los kho cov tshaj tawm, thiab muab cov ntsiab lus los ntawm cov neeg thib peb. Thaum koj siv peb lub vas sab, koj lees paub tias koj tau nyeem thiab nkag siab peb Txoj Cai Tswjfwm Ntiag Tug thiab Cov Cai Siv.
Lub sijhawm tshaj tawm: Plaub Hlis-12-2023