Idioma:

Determination of Tannin in Green Tea Infusion by Flow-Injection Analysis Based on Quenching the Fluorescence of 3-Aminophthalate

Chen, Richie L. C ; Lin, Chun-Hsun ; Chung, Chien-Yu ; Cheng, Tzong-Jih

Journal of agricultural and food chemistry, 2005-11, Vol.53 (22), p.8443-8446 [Periódico revisado por pares]

Washington, DC: American Chemical Society

Texto completo disponível

Citações Citado por

Enviar para

Título:
Determination of Tannin in Green Tea Infusion by Flow-Injection Analysis Based on Quenching the Fluorescence of 3-Aminophthalate
Autor: Chen, Richie L. C ; Lin, Chun-Hsun ; Chung, Chien-Yu ; Cheng, Tzong-Jih
Assuntos: Ascorbic Acid ; Biological and medical sciences ; Coffee, tea and other stimulative beverage industries ; Fish and seafood industries ; flow injection analysis ; Flow Injection Analysis - methods ; Fluorescence ; food analysis ; food composition ; Food industries ; food quality ; Fundamental and applied biological sciences. Psychology ; green tea ; green tea infusions ; Hydrogen-Ion Concentration ; phthalates ; Phthalic Acids - chemistry ; Quality Control ; Sensitivity and Specificity ; tannins ; Tannins - analysis ; Tea - chemistry
É parte de: Journal of agricultural and food chemistry, 2005-11, Vol.53 (22), p.8443-8446
Notas: ark:/67375/TPS-PBHPCRHD-Z
istex:14EA01EDD964725AB7E262353AAF10A79CD1BFE0
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: A flow-injection analytical system was developed to determine tannin content in green tea infusions. The flow-injection system is based on measuring the quenching effect of tannin on the fluorescence of 3-aminophthalate. Fluorophore was obtained by auto-oxidation of luminol during solution preparation. System performance was satisfactory for routine analysis (sample throughput >20 h-1; linear dynamic range for tannic acid, 0.005−0.3 mg/mL; linear dynamic range for green tea tannin, 0.02−1.0 mg/mL; CV < 3%). The flow-injection method is immune from interference by coexisting ascorbate in green tea infusion. Analytical results were verified by the ferrous tartrate method, the Japanese official analytical method. Keywords: Flow-injection; tannin; fluorescence; quenching; luminol; 3-aminophthalate; green tea
Editor: Washington, DC: American Chemical Society
Idioma: Inglês

Links

Voltar para lista de resultados

Realização: Logos de Redes Sociais:

Determination of Tannin in Green Tea Infusion by Flow-Injection Analysis Based on Quenching the Fluorescence of 3-Aminophthalate

Chen, Richie L. C ; Lin, Chun-Hsun ; Chung, Chien-Yu ; Cheng, Tzong-Jih

Washington, DC: American Chemical Society

Buscando em bases de dados remotas. Favor aguardar.