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Monitoring content of cadmium, calcium, copper, iron, lead, magnesium and manganese in tea leaves by electrothermal and flame atomizer atomic absorption spectrometry.

Prkić, Ante; Jurić, Antonija; Giljanović, Josipa; Politeo, Nives; Sokol, Vesna; Bošković, Perica; Brkljača, Mia; Stipišić, Angela; Fernandez, Carlos; Vukušić, Tina

Authors

Ante Prkić

Antonija Jurić

Josipa Giljanović

Nives Politeo

Vesna Sokol

Perica Bošković

Mia Brkljača

Angela Stipišić

Carlos Fernandez

Tina Vukušić



Abstract

Due to the simplicity of tea preparation (pouring hot water onto different dried herbs) and its high popularity as a beverage, monitoring and developing a screening methodology for detecting the metal content is very important. The concentrations of Cd, Ca, Cu, Fe, Pb, Mg and Mn in 11 different samples of sage (Salvia officinalis L.), linden (Tilia L.) and chamomile (Matricaria chamomilla L.) purchased at local herbal pharmacy were determined using electrothermal atomizer atomic absorption spectrometry (ETAAS) and flame atomizer atomic absorption spectrometry (FAAS). The concentrations determined were: Cd (0.012 - 0.470 mg kg(-1)), Ca (5209 - 16340 mg kg(-1)), Cu (22.01 - 33.05 mg kg(-1)), Fe (114.2 - 440.3 mg kg(-1)), Pb (0.545 - 2.538 mg kg(-1)), Mg (2649 - 4325 mg kg(-1)) and Mn (34.00 - 189.6 mg kg(-1)). Principal Component Analysis (PCA) was applied to identify factors (soil and climate) influencing the content of the measured elements in herbal samples. The proposed methodology developed in this work was successfully applied to the detection of metals in herbal samples. The analysis showed that the content of toxic metals in herbal teas was below the maximum dose recommended by the World Health Organization (WHO).

Journal Article Type Article
Publication Date Aug 31, 2017
Journal Open chemistry
Electronic ISSN 2391-5420
Publisher De Gruyter
Peer Reviewed Peer Reviewed
Volume 15
Issue 1
Pages 200-207
Institution Citation PRKIC, A., JURIC, A., GILJANOVIC, J., POLITEO, N., SOKOL, V., BOSKOVIC, P., BRKLJACA, M., STIPISIC, A., FERNANDEZ, C. and VUKUSIC, T. 2017. Monitoring content of cadmium, calcium, copper, iron, lead, magnesium and manganese in tea leaves by electrothermal and flame atomizer atomic absorption spectrometry. Open chemistry [online], 15(1), pages 200-207. Available from: https://doi.org/10.1515/chem-2017-0023
DOI https://doi.org/10.1515/chem-2017-0023
Keywords Trace elements; Chemometrics; Tea; ETAAS; FAAS; PCA

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