Characterisation of catechins and their oxidised derivatives in Ceylon tea using multi-dimensional liquid chromatography and high-resolution mass spectrometry (Record no. 53883)
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| 000 -LEADER | |
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| fixed length control field | 02565nam a2200301Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625162436.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-19764 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Characterisation of catechins and their oxidised derivatives in Ceylon tea using multi-dimensional liquid chromatography and high-resolution mass spectrometry |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Journal of Chromatography A, 1682, p.463477, 2022 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | Tea is a complex food matrix comprising of many structurally diverse compounds, of which catechins and their oxidised derivatives are of particular interest due to their nutritional functionality. However, these catechins and derivatives exist in various isomeric forms with few or no pure standards available, rendering their analysis challenging. A method combining multi-dimensional liquid chromatography (MDLC)and high-resolution mass spectrometry (HRMS)was developed for the characterisation of these compounds using Ceylon tea as a model. Based on a Plackett-Burman (PB)design, flow rate and initial methanol percentage were identified as the most significant factors (p < 0.05)affecting chromatogram coverage and resolution (Rs)for comprehensive two-dimensional LC (LCxLC)and heart-cutting two-dimensional LC (LC-LC)respectively. Central composite design (CCD)was then applied using these parameters for method optimisation and to identify second-order relationships between screened parameters. The optimised LCxLC (flow rate: 2.18 mL/min and initial methanol percentage: 28.0 percent)and LC-LC (flow rate: 0.86 mL/min and initial methanol percentage for different cuts: A- 10.0 percent; B- 15.8 percent; and C- 18.7 percent)methods were applied to the analysis of Ceylon tea samples from seven regions of Sri Lanka and demonstrated an improved separation of co-eluting isomeric compounds. Finally, with the mass spectral information from HRMS, a total of 31 compounds (eight monomers, 17 dimers, five trimers and one tetramer)were detected and putatively identified in Ceylon tea. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MDLC |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | HRMS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | CATECHINS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | OXIDISED DERIVATIVES |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | CEYLON TEA |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Huang, Y. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Goh, R. M. V. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Pua, A. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Liu, S. Q. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ee, K. H. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Lassabliere, B. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Yu, B. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1mN2M4XJIYmfVyECfxmMKWGg1sfJLevyh/view?usp=drivesdk">https://drive.google.com/file/d/1mN2M4XJIYmfVyECfxmMKWGg1sfJLevyh/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-19764 | 25.06.2025 | 25.06.2025 | Documentos solicitados |