Nyocha LCMS: Nchọpụta Phthalates na Baijiu nke ndị China

N'afọ ndị na-adịbeghị anya, mmetọ phthalate na Baijiu nke China (mmanya China) adọtala uche ọha na eze ugboro ugboro dị ka ihe gbasara nchekwa nri. Ihe ndị a na-emepụta kemịkalụ, nke nwere ike ịbanye n'ime mmanya ahụ, na-etinye ihe egwu nwere ike ibute ahụike mmadụ. N'ime usoro nyocha dị iche iche, Liquid Chromatography-Mass Spectrometry (LCMS) apụtala dị ka ngwaọrụ dị mkpa maka ịchọpụta phthalates na Baijiu nke China, n'ihi nnukwu mmetụta na izi ezi ya.

Phthalates: Ihe mgbakwunye a na-achọghị na Baijiu nke ndị China;

A na-ejikarị Phthalates, ma ọ bụ phthalic acid esters (PAEs), eme ihe dị ka plastik. Na Baijiu nke China, ha nwere ike isi na:

1. Mbugharị site na ihe mkpuchi plastik;
2. Kpọtụrụ ya na ọkpọkọ plastik ma ọ bụ ihe mkpuchi n'oge mmepụta;
3. Mmetọ gburugburu ebe obibi nke ihe ndị e ji mee ihe;

Ọ bụ ezie na iwu mba machibidoro iji ihe plastik eme ihe kpọmkwem na kọntaktị kpọmkwem na Baijiu nke China, njem nke ọkwa nsochi ka bụ ihe na-echegbu onwe ya. Iri oke phthalates ogologo oge nwere ike imebi usoro endocrine, yana mmetụta nwere ike inwe na mmepe nwa na ahụike ọmụmụ.

LCMS: Ihe Nchọpụta Molekụla maka Phthalates;

Liquid Chromatography-Mass Spectrometry (LCMS) na-ejikọta ikike nkewa dị elu nke liquid chromatography na oke mmetụta nke mass spectrometry, na-eme ka ọ dabara adaba karịsịa maka inyocha ihe ndị dị na matrices dị mgbagwoju anya dịka Chinese Baijiu. Uru ndị dị mkpa gụnyere:

• Nnukwu mmetụta uche: Nchọpụta na ng/mL ma ọ bụ obere njupụta;
• Nhọrọ dị elu: Nchọpụta ziri ezi na ọnụọgụ nke ọtụtụ phthalates;
• Arụmọrụ dị elu: Nyocha nke ọtụtụ ihe mgbaru ọsọ n'otu oge n'otu ntụtụ;
• Ike siri ike nke igbochi nnyonye anya: Na-ebelata mmetụta matrix sitere na Baijiu nke China nke ọma;

Usoro Ọrụ LCMS maka Nchọpụta Phthalate na Baijiu nke ndị China;

1. Nkwadebe Ihe Nlereanya;

·Mgbaze ma ọ bụ ịgba ọgwụ ozugbo (maka ihe nlele ndị na-adịghị amịpụta ihe dị ukwuu);

· Ngụkọta nitrogen na mgbanwe ihe mgbaze;

1. Nkewa nke Chromatography Mmiri Mmiri;

Site na iji kọlụm C18 nke nwere methanol/mmiri ma ọ bụ acetonitrile/mmiri dị ka usoro mgbọgharị, a na-eji mgbọpụta gradient iji kewaa ihe ndị na-eme ka plastik dị iche iche dị iche iche. Ihe ndị a na-ahụkarị maka nchọpụta gụnyere:

Dimethyl phthalate (DMP)

Diethyl phthalate (DEP)

· Dibutyl phthalate (DBP)

·Dị (2-ethylhexyl) phthalate (DEHP)

1. Nchọpụta Spectrometer Oke;

Chọpụta na ọnọdụ ion na-adịghị mma site na iji isi iyi ion ọkụ eletrik (ESI) ma ọ bụ isi iyi ionization kemịkalụ nrụgide ikuku (APCI). Igwe nlele oke na-eme ka nhọrọ na mmetụta nke nchọpụta dịkwuo mma site na ọnọdụ nlekota mmeghachi omume dị iche iche (MRM).

Nnwale na Njikwa Ogo Usoro;

Usoro LCMS a pụrụ ịtụkwasị obi chọrọ nkwenye siri ike:

• Oke ahịrị: Na-ekpuchi oke a tụrụ anya ya site na R² > 0.99;
• Oke nchọpụta/nhazi: Ọ na-abụkarị na ọkwa dị n'okpuru μg/L, na-agbaso ụkpụrụ iwu;
• Izi ezi na nkenke: Ọnụego mgbake Spike nke 85-115%, mgbanwe ọkọlọtọ dị n'etiti <15%;
• Nkọwapụta: Na-ahụ na ebe ndị a na-elekwasị anya enweghị nsogbu;

Nzaghachi Ụlọ Ọrụ na Nduzi Ndị Ahịa;

Site na ọganihu na teknụzụ nchọpụta na iwu siri ike, ụlọ ọrụ Baijiu nke China emeela ihe iji belata ihe egwu phthalate:

1. Njikwa isi mmalite: Nkwụsị nke ihe ndị e ji plastik mee na mmepụta nwayọ nwayọ;
2. Njikwa usoro: Nlekota na njikwa ihe eji arụ ọrụ nke ọma;
3. Nnwale ngwaahịa ikpeazụ: Sistemụ nyocha mma siri ike;

Dịka ndị ahịa, anyị nwere ike ime ihe ndị a:

• Ịzụta site na akara ndị a ma ama site na ọwa gọọmentị;
• Lelee iguzosi ike n'ezi ihe nke nkwakọ ngwaahịa ma zere ngwaahịa mebiri emebi;
• Debe nke ọma, na-ezere oke okpomọkụ na nchekwa ogologo oge;

Echiche Ọdịnihu;

LCMS ga-anọgide na-arụ ọrụ dị mkpa n'ịchọpụta phthalate maka Baijiu nke China. Mmezi na-aga n'ihu na mmetụta ngwaọrụ na nhazi usoro ga-eme ka nyocha ngwa ngwa na nke ziri ezi karịa. Mmepe nke ụzọ nyocha ọtụtụ nyocha ga-eme ka mma na nchekwa zuru oke sie ike.

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