Determination of Fungi and Multi-Class Mycotoxins inCamelia sinensisand Herbal Teas and Dietary Exposure Assessment

Reinholds, IngarsInst Food Safety Anim Hlth & Environm BIOR, Latvia; Univ Latvia, Latvia (author)

Funding Agencies|European Regional Development Fund (ERDF) within the Project activity 1.1.1.2 "Post-doctoral Research Aid"European Union (EU) [1.1.1.2/VIAA/1/16/219]
In this paper, a study of fungal and multi-mycotoxin contamination in 140Camellia sinensisand 26 herbal teas marketed in Latvia is discussed. The analysis was performed using two-dimensional liquid chromatography with time-of-flight mass spectrometry (2D-LC-TOF-MS) and MALDI-TOF-MS. In total, 87% of the tea samples tested positive for 32 fungal species belonging to 17 genera, with the total enumeration of moulds ranging between 1.00 x 10(1)and 9.00 x 10(4)CFU g(-1). Moreover, 42% of the teas (n= 70) were contaminated by 1 to 16 mycotoxins, and 37% of these samples were positive for aflatoxins at concentrations ranging between 0.22 and 41.7 mu g kg(-1). Deoxynivalenol (DON) and its derivatives co-occurred in 63% of the tea samples, with their summary concentrations reaching 81.1 to 17,360 mu g kg(-1). Ochratoxin A (OTA), enniatins, and twoAlternariatoxins were found in 10-37% of the teas at low concentrations. The dietary exposure assessment based on the assumption of a probable full transfer of determined mycotoxins into infusions indicated that the analysed teas are safe for consumers: the probable maximum daily exposure levels to OTA and the combined DON mycotoxins were only 0.88 to 2.05% and 2.50 to 78.9% of the tolerable daily intake levels.

NATURVETENSKAP Biologi Mikrobiologi hsv//swe
NATURAL SCIENCES Biological Sciences Microbiology hsv//eng
mycotoxins; Camellia sinensisteas; herbal teas; 2D-LC-TOF-MS; MALDI-TOF-MS; fungi; dietary exposure assessment

Bogdanova, EstefanijaInst Food Safety Anim Hlth & Environm BIOR, Latvia (author)
Pugajeva, IvetaInst Food Safety Anim Hlth & Environm BIOR, Latvia (author)
Alksne, LauraInst Food Safety Anim Hlth & Environm BIOR, Latvia (author)
Stålberga, DartaLinköpings universitet,Medicinska fakulteten(Swepub:liu)n/a (author)
Valcina, OlgaInst Food Safety Anim Hlth & Environm BIOR, Latvia (author)
Bartkevics, VadimsInst Food Safety Anim Hlth & Environm BIOR, Latvia; Univ Latvia, Latvia (author)
Inst Food Safety Anim Hlth & Environm BIOR, Latvia; Univ Latvia, LatviaInst Food Safety Anim Hlth & Environm BIOR, Latvia (creator_code:org_t)

By the author/editor: Reinholds, Ingar ...; Bogdanova, Estef ...; Pugajeva, Iveta; Alksne, Laura; Stålberga, Darta; Valcina, Olga; show more...; Bartkevics, Vadi ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Biological Scien ...; and Microbiology

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