Ukuhlaziywa kwe-LCMS: Ukulandelela ama-Phthalates ngesi-Chinese Baijiu

Eminyakeni yamuva nje, ukungcoliswa kwe-phthalate ku-Baijiu yaseShayina (utshwala baseShayina) kuye kwadonsela ukunaka komphakathi ngokuphindaphindiwe njengento ekhathaza ukuphepha kokudla. Lawa makhemikhali amakhemikhali, angase angene otshwaleni, abeka izingozi ezingaba khona empilweni yabantu. Phakathi kwamasu ahlukahlukene okuhlaziya, i-Liquid Chromatography-Mass Spectrometry (LCMS) ivele njengethuluzi elibalulekile lokulandelela ama-phthalate ku-Baijiu yaseShayina, ngenxa yokuzwela kwayo okuphezulu nokunemba kwayo.

Pama-hthalates: Izithasiselo Ezingafuneki ku-Baijiu yesiShayina​

Ama-phthalates, noma ama-phthalic acid esters (ama-PAE), avame ukusetshenziswa njengezinto zokufaka ipulasitiki. Ku-Baijiu yesiShayina, angase avele ku:

1. Ukufuduka kusuka ezintweni zokupakisha zepulasitiki;
2. Ukuthintana namapayipi epulasitiki noma izitsha ngesikhathi sokukhiqiza;
3. Ukungcoliswa kwemvelo kwezithako;

Nakuba ukusetshenziswa kwezinto zepulasitiki lapho kuhlangana ngqo ne-Baijiu yaseShayina kuvinjelwe yimithetho kazwelonke, ukufuduka kwezinga lokulandelela kusalokhu kuyinkathazo. Ukudla ngokweqile ama-phthalates isikhathi eside kungaphazamisa uhlelo lwe-endocrine, kube nemiphumela engaba khona ekukhuleni kwengane kanye nempilo yokuzala.

I-LCMS: Umphenyi We-Molecular We-Phthalates​

I-Liquid Chromatography-Mass Spectrometry (LCMS) ihlanganisa ikhono eliphezulu lokuhlukaniswa kwe-liquid chromatography nokuzwela okuphezulu kwe-mass spectrometry, okwenza ifaneleke kakhulu ekuhlaziyeni ama-trace compounds kuma-matrices ayinkimbinkimbi njenge-Chinese Baijiu. Izinzuzo ezibalulekile zifaka:

• Ukuzwela okuphezulu: Ukutholwa ku-ng/mL noma amazinga aphansi;
• Ukukhetha okuphezulu: Ukuhlonza okunembile kanye nokulinganisa ama-phthalates amaningi;
• Ukusebenza kahle okuphezulu: Ukuhlaziywa ngasikhathi sinye kwama-target amaningi ngomjovo owodwa;
• Amandla aqinile okulwa nokuphazamiseka: Inciphisa ngempumelelo imiphumela ye-matrix evela ku-Baijiu yaseShayina;

Ukuhamba Komsebenzi we-LCMS Wokuthola I-Phthalate ngesi-Chinese Baijiu​

1. Ukulungiselela Isampula​

·Ukuxuba noma ukujova ngqo (kumasampula anokuhlushwa okuncane);

·Ukugxila kwe-nitrogen ebhobozekile kanye nokushintshana kwe-solvent;

1. Ukuhlukaniswa kwe-Liquid Chromatography​

Kusetshenziswa ikholomu ye-C18 reverse phase chromatography ene-methanol/amanzi noma i-acetonitrile/amanzi njengesigaba esihambayo, i-gradient elution isetshenziselwa ukuhlukanisa ama-plasticizer ahlukene. Izinhloso ezivamile zokuthola zifaka:

· I-Dimethyl phthalate (DMP)

· I-Diethyl phthalate (DEP)

· I-Dibutyl phthalate (DBP)

· I-Di (2-ethylhexyl) phthalate (DEHP)

1. Ukutholwa kwe-Mass Spectrometry​

Thola kwimodi ye-ion engemihle ngomthombo we-ion osebenzisa ugesi (i-ESI) noma umthombo we-ionization wamakhemikhali osebenzisa ingcindezi yomoya (i-APCI). I-mass spectrometer ithuthukisa ukukhetha kanye nokuzwela kokutholwa ngemodi yokuqapha ukusabela okuningi (i-MRM).

Ukuqinisekiswa Kwendlela Nokulawulwa Kwekhwalithi​

Indlela ye-LCMS ethembekile idinga ukuqinisekiswa okuqinile:

• Ububanzi obuqondile: Bumboza ukugcwala okulindelekile nge-R² > 0.99；
• Umkhawulo wokutholwa/ukulinganiswa: Ngokuvamile kumazinga angaphansi kwe-μg/L, okuhambisana nezindinganiso zomthetho；
• Ukunemba nokunemba: Amazinga okubuyisa i-spike angu-85–115%, ukuphambuka okujwayelekile okuhlobene <15% ；
• Ukucaciswa: Kuqinisekisa ukuthi iziqongo eziqondiwe aziphazamisi;

Izimpendulo Zemboni kanye Nesiqondiso Sabathengi​

Ngokuthuthuka kobuchwepheshe bokuthola kanye nemithetho eqinile, imboni yaseShayina iBaijiu isebenzise izinyathelo zokunciphisa izingozi ze-phthalate:

1. Ukulawulwa komthombo: Ukukhishwa kancane kancane kwezingxenye zepulasitiki ekukhiqizweni ；
2. Ukuphathwa kwenqubo: Ukuqapha okuthuthukisiwe kanye nokulawulwa kwezinto zokusetshenziswa;
3. Ukuhlolwa komkhiqizo wokugcina: Izinhlelo zokuhlola ikhwalithi eqinile ；

Njengabathengi, singenza okulandelayo:

• Thenga kumikhiqizo edumile ngeziteshi ezisemthethweni；
• Hlola ubuqotho bokupakisha futhi ugweme imikhiqizo eyonakele;
• Gcina kahle, ugweme amazinga okushisa aphezulu kanye nokugcinwa isikhathi eside;

Imibono Yesikhathi Esizayo​

I-LCMS izoqhubeka nokudlala indima ebalulekile ekutholakaleni kwe-phthalate kwe-Chinese Baijiu. Ukuthuthukiswa okuqhubekayo kokuzwela kwezinsimbi kanye nokwenza ngcono izindlela kuzokwenza kube lula ukuhlaziya okusheshayo nokunembile. Ukuthuthukiswa kwezindlela zokuhlola i-multi-analyte kuzoqinisekisa ikhwalithi ephelele kanye nokuqinisekiswa kokuphepha.

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