Kuongorora kweLCMS: Kutevera Phthalates muChinese Baijiu

Mumakore achangopfuura, kusvibiswa kwe phthalate muChinese Baijiu (doro rekuChina) kwave kuchikwezva vanhu kakawanda sedambudziko rekuchengetedzwa kwechikafu. Makemikoro aya, anogona kupinda mudoro, anogona kuisa njodzi kuhutano hwevanhu. Pakati penzira dzakasiyana-siyana dzekuongorora, Liquid Chromatography-Mass Spectrometry (LCMS) yakabuda sechishandiso chakakosha chekutevera phthalate muChinese Baijiu, nekuda kwekunzwa kwayo kwakanyanya uye kururama.

Phthalates: Zvimwe Zvisingadiwi muChinese Baijiu​

MaPhthalates, kana kuti phthalic acid esters (PAEs), anoshandiswa zvakanyanya semaplasticizers. MuChinese Baijiu, anogona kubva pa:

1. Kutama kubva pazvinhu zvepurasitiki zvekurongedza;
2. Kubata mapaipi epurasitiki kana midziyo panguva yekugadzira;
3. Kusvibiswa kwezvinhu zviri mukati mezvakatipoteredza;

Kunyangwe kushandiswa kwezvinhu zvepurasitiki zvakananga neChinese Baijiu kuchirambidzwa nemitemo yenyika, kufamba kwemasero emhuka kuchiri dambudziko. Kudya phthalates zvakanyanya kwenguva refu kunogona kukanganisa endocrine system, zvichikanganisa kukura kwemwana uye hutano hwekubereka.

LCMS: Muongorori weMolecular wePhthalates​

Liquid Chromatography-Mass Spectrometry (LCMS) inosanganisa kugona kukuru kwekuparadzanisa kwe liquid chromatography ne high sensitivity ye mass spectrometry, zvichiita kuti ive yakakodzera kuongorora trace compounds mu complex matrices se Chinese Baijiu. Zvakanakira zvikuru zvinosanganisira:

• Kunzwa kwakanyanya: Kuonekwa pa ng/mL kana kuti huwandu hwakaderera;
• Kusarudza kwakanyanya: Kuzivikanwa kwakarurama uye kuyera huwandu hwema phthalates akawanda;
• Kushanda zvakanaka: Kuongorora panguva imwe chete zvinangwa zvakawanda mujekiseni rimwe chete;
• Kugona kwakasimba kwekudzivirira kupindira: Zvinobudirira kuderedza mhedzisiro yematrix kubva kuChinese Baijiu;

Kufamba kweLCMS kweKuona Phthalate muChinese Baijiu​

1. Kugadzirira Muenzaniso​

·Kudiridza kana kubaya zvakananga (kune mienzaniso isina kuzara zvakanyanya);

·Kuwanda kwenitrogen inoputswa uye kuchinjana kwe solvent;

1. Kuparadzaniswa kweLiquid Chromatography​

Uchishandisa C18 reverse phase chromatography column ine methanol/water kana acetonitrile/water se mobile phase, gradient elution inoshandiswa kupatsanura plasticizers dzakasiyana. Zvinangwa zvinowanzoonekwa zvinosanganisira:

· Dimethyl phthalate (DMP)

· Diethyl phthalate (DEP)

·Dibutyl phthalate (DBP)

·Di (2-ethylhexyl) phthalate (DEHP)

1. Kuonekwa kweMass Spectrometry​

Tsvaga kana uri mu negative ion mode uchishandisa electric spray ion source (ESI) kana atmospheric pressure chemical ionization source (APCI). Iyo mass spectrometer inovandudza kusarudza uye kunzwa kwekuona kuburikidza ne multiple reaction monitoring (MRM) mode.

Kusimbiswa kweNzira uye Kudzora Hunhu​

Nzira yakavimbika yeLCMS inoda kusimbiswa kwakasimba:

• Rudzi rwemutsetse: Inofukidza huwandu hunotarisirwa neR² > 0.99；
• Muganho wekuonekwa/kuverengwa: Kazhinji pamazinga e-sub-μg/L, zvichitevedzera mitemo yepamutemo ；
• Kururama uye kunyatsorongeka: Mwero wekudzoreredza spike we85–115%, kutsauka kwakajairika <15% ；
• Kunyatsojeka: Kunoita kuti zvibodzwa zvisakanganiswa;

Mhinduro dzeIndasitiri uye Gwara reVatengi​

Nekufambira mberi muhunyanzvi hwekuona uye mitemo yakaoma, indasitiri yeBaijiu yekuChina yatanga matanho ekuderedza njodzi dzephthalate:

1. Kudzora manyuko: Kubviswa zvishoma nezvishoma kwezvikamu zvepurasitiki mukugadzirwa ；
2. Kutarisira maitiro: Kuongororwa kwakawedzerwa uye kutonga kwezvinhu zvakatsvuka;
3. Kuedzwa kwekupedzisira kwechigadzirwa: Masisitimu ekuongorora emhando yepamusoro akasimba ；

Sevatengi, tinogona kuita zvinotevera:

• Tenga kubva kumakambani ane mukurumbira kuburikidza nenzira dzepamutemo；
• Tarisa kuvimbika kwekurongedza uye dzivisa zvigadzirwa zvakakuvara;
• Chengeta zvakanaka, kudzivirira tembiricha yakakwira uye kuchengetwa kwenguva refu;

Maonero Eramangwana​

LCMS icharamba ichiita basa rakakosha mukuona phthalate yeChinese Baijiu. Kuvandudzwa kuri kuenderera mberi mukunzwisisa kwemidziyo uye kugadzirisa nzira kuchaita kuti pave nekukurumidzira uye kwakanyatsojeka kwekuongorora. Kugadzirwa kwenzira dzekuongorora dzakawanda kuchawedzera kuve nechokwadi chekuti mhando yakakwana uye kuchengetedzeka kwakazara.

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