Kusanthula kwa LCMS: Kutsata Ma Phthalates mu Baijiu yaku China​

M'zaka zaposachedwapa, kuipitsidwa kwa phthalate mu Baijiu yaku China (chakumwa cha ku China) kwakopa chidwi cha anthu mobwerezabwereza ngati vuto la chitetezo cha chakudya. Mankhwalawa, omwe amatha kusamutsidwa kupita ku mowa, amakhala ndi zoopsa pa thanzi la anthu. Pakati pa njira zosiyanasiyana zowunikira, Liquid Chromatography-Mass Spectrometry (LCMS) yakhala chida chofunikira kwambiri chofufuzira ma phthalate mu Baijiu yaku China, chifukwa cha kukhudzidwa kwake kwakukulu komanso kulondola kwake.

Phthalates: Zowonjezera Zosafunikira mu Baijiu yaku China​

Ma phthalates, kapena ma phthalic acid esters (PAEs), amagwiritsidwa ntchito kwambiri ngati ma plasticizer. Mu Baijiu yaku China, angachokere ku:

1. Kusamuka kuchokera ku zipangizo zopangira pulasitiki;
2. Kukhudza mapaipi apulasitiki kapena zotengera panthawi yopanga;
3. Kuipitsidwa kwa zinthu zachilengedwe;

Ngakhale kugwiritsa ntchito zipangizo zapulasitiki pokhudzana mwachindunji ndi Baijiu yaku China kuli koletsedwa ndi malamulo a dzikolo, kusamuka kwa anthu omwe ali ndi matenda a shuga kumakhalabe vuto. Kudya kwambiri ma phthalates kwa nthawi yayitali kungasokoneze dongosolo la endocrine, zomwe zingakhudze kukula kwa mwana komanso thanzi la kubereka.

LCMS: Wofufuza wa Molecular wa Phthalates​

Chromatography ya Madzi-Mass Spectrometry (LCMS) imaphatikiza kuthekera kwakukulu kolekanitsa kwa chromatography yamadzimadzi ndi kuthekera kwakukulu kwa mass spectrometry, zomwe zimapangitsa kuti ikhale yoyenera kwambiri posanthula ma trace compounds mu matrix ovuta monga Chinese Baijiu. Ubwino waukulu ndi monga:

• Kuzindikira kwambiri: Kuzindikira pa ng/mL kapena kuchuluka kochepa;
• Kusankha kwakukulu: Kuzindikira molondola ndi kuwerengera ma phthalates angapo;
• Kuchita bwino kwambiri: Kusanthula nthawi imodzi kwa zolinga zingapo mu jakisoni imodzi;
• Mphamvu yolimbana ndi kusokoneza: Imachepetsa bwino zotsatira za matrix kuchokera ku Baijiu yaku China;

Kuyenda kwa LCMS kwa Kuzindikira Phthalate mu Chitchaina Baijiu​

1. Kukonzekera Chitsanzo​

·Kuchepetsa kapena kubaya mwachindunji (kwa zitsanzo zosakhutitsidwa kwambiri);

·Kuchuluka kwa nayitrogeni ndi kusinthana kwa zosungunulira;

1. Kulekanitsa kwa Chromatography ya Madzi​

Pogwiritsa ntchito column ya C18 reverse phase chromatography yokhala ndi methanol/madzi kapena acetonitrile/madzi ngati gawo loyenda, gradient elution imagwiritsidwa ntchito kulekanitsa ma plasticizer osiyanasiyana. Zolinga zodziwika bwino ndi izi:

· Dimethyl phthalate (DMP)

· Diethyl phthalate (DEP)

· Dibutyl phthalate (DBP)

·Di (2-ethylhexyl) phthalate (DEHP)

1. Kuzindikira Mass Spectrometry​

Dziwani mu negative ion mode pogwiritsa ntchito electric spray ion source (ESI) kapena atmospheric pressure chemical ionization source (APCI). Mass spectrometer imawongolera kusankha ndi kuzindikira kwa kuzindikira kudzera mu multiple reaction monitoring (MRM) mode.

Kutsimikizira Njira ndi Kuwongolera Ubwino​

Njira yodalirika ya LCMS imafuna kutsimikizika kolimba:

• Mtundu wa mzere: Umaphimba kuchuluka komwe kukuyembekezeka ndi R² > 0.99；
• Malire a kuzindikira/kuwerengera: Kawirikawiri pamlingo wa sub-μg/L, kutsatira miyezo yoyendetsera;
• Kulondola ndi kulondola: Kuchuluka kwa kuchira kwa spike kwa 85–115%, kupotoka kofanana <15% ；
• Kufotokozera Mwakuya: Kumaonetsetsa kuti ma peak omwe mukufuna sakusokonezedwa;

Mayankho a Makampani ndi Malangizo a Ogula​

Ndi kupita patsogolo kwa ukadaulo wozindikira komanso malamulo okhwima, makampani aku China a Baijiu akhazikitsa njira zochepetsera zoopsa za phthalate:

1. Kuwongolera gwero: Kuchotsa pang'onopang'ono zigawo za pulasitiki popanga zinthu;
2. Kasamalidwe ka njira: Kuyang'anira bwino ndi kulamulira zinthu zopangira;
3. Kuyesa kwa zinthu zomaliza: Makina owunikira bwino kwambiri;

Monga ogula, titha kuchita izi:

• Gulani kuchokera ku makampani odziwika bwino kudzera m'njira zovomerezeka；
• Chongani kukhulupirika kwa ma CD ndi kupewa zinthu zowonongeka;
• Sungani bwino, kupewa kutentha kwambiri komanso kusungidwa kwa nthawi yayitali;

Malingaliro Amtsogolo​

LCMS ipitilizabe kugwira ntchito yofunika kwambiri pakupeza phthalate kwa a Baijiu aku China. Kupita patsogolo kwa kukhudzidwa kwa zida ndi kukonza njira kudzapangitsa kuti pakhale kusanthula mwachangu komanso molondola. Kupanga njira zowunikira zambiri kudzatsimikiziranso kuti zinthu zili bwino komanso kuti zinthu zikuyendereni bwino.

Do you have questions about Chinese Baijiu testing? We welcome discussions via email at international@bfrl.com.cn.