Multielement analysis of Chinese tea ( Camellia sinensis ) by total-reflection X-ray fluorescence

Xie, Mingyong; Bohlen, Alex von; Klockenkämper, R.; Jian, Xu; Günther, Klaus

doi:10.1007/s002170050291

Cited by 86 publications

(77 citation statements)

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“…Concentrations of Fe in slim teas are very similar to those obtained by Aksuner et al (2012), Colak et al (2005), Kara (2009) andMcKenzie et al (2010), but higher than those determined by Chen et al (2009), Matsuura et al (2001 and Narin et al (2004b). Contents of Zn found in this work are consistent with the findings of Matsuura et al (2001) and Xie et al (1998). However, Aksuner et al (2012), Mierzwa et al (1998) and Soylak et al (2007) reported a lower Zn value for different type of teas.…”

Section: −1supporting

confidence: 87%

“…Teas and herbs can be an important source of such essential elements as Mn, Fe, Zn and Cu, which are crucial for biochemical reactions in the human body. Manganese activates numerous essential enzymes; Fe is within the hemoglobin molecule, Zn is necessary for an enzymatic activity among humans, while Cu is essential for the hemoglobin synthesis (Biego et al 1998;Colak et al 2005;Xie et al 1998). Concentrations of these micro-elements fulfill the following order: Mn>Fe>Zn>Cu.…”

Section: Slim Teasmentioning

confidence: 99%

“…Concentrations of Sr were lower than those obtained by Kara (2009) andMcKenzie et al (2010) for black and green teas. Xie et al (1998) reported the range of Ba and Sr concentrations in Chinese tea samples as 3.0-42 and 3.5-24 μg g −1 , respectively. Our results for Ni are lower than those observed by Colak et al (2005) and Narin et al (2004a), but are in a good accordance with those reported by Aksuner et al (2012), Malik et al (2008), Seenivasan et al (2008) and Soylak et al (2007).…”

Section: −1mentioning

confidence: 99%

“…Generally, the determination of total concentrations of various macro-and micro-elements in different teas as well as medicinal plants is carried out with the use of flame atomic absorption spectrometry (FAAS) (Aksuner et al 2012;Colak et al 2005;Kumar et al 2005;Li et al 2006;Malik et al 2008;Narin et al 2004a,b;Seenivasan et al 2008;Soylak et al 2007), graphite furnace atomic absorption spectrometry (GF AAS) (Dash et al 2008;Seenivasan et al 2008), inductively coupled plasma optical emission spectrometry (ICP OES) (Chen et al 2009;Dash et al 2008;Kara 2009;Malik et al 2008;Matsuura et al 2001;McKenzie et al 2010;Mierzwa et al 1998;Özcan et al 2008), inductively coupled plasma mass spectrometry (ICP MS) (Kara 2009;Matsuura et al 2001;Nookabkaew et al 2006;Shen and Chen 2008) and X-ray fluorescence spectrometry (XRFS) (Salvador et al 2002;Xie et al 1998). As a rule, the decomposition of the matrix of tea samples is an indispensable and mandatory step before their elemental analysis by the majority of these spectrometric methods.…”

Section: Introductionmentioning

confidence: 99%

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Simple and Fast Sample Preparation Procedure Prior to Multi-element Analysis of Slim Teas by ICP OES

2014

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The knowledge about mineral content of slim teas is of great importance since the consumption of these beverages has rapidly increased for the past several years. An increasing popularity of these tea products is mainly attributed to their nutritional properties, flavor, taste and health effects. Therefore, the main goal of the present work was to develop a precise and accurate method of the multi-element analysis of slim teas by inductively coupled plasma optical emission spectrometry (ICP OES) without the need for a laborious and tedious sample treatment preceding spectrometric measurements. Five sample preparation procedures, i.e., the total decomposition in a mixture of HNO 3 and H 2 O 2 solutions using closed vessel microwave-assisted or open vessel hot-plate systems, the solubilisation in aqua regia or a tetramethyl ammonium hydroxide solution and the extraction in a diluted HNO 3 solution, were compared. The performance of the compared procedures was determined in terms of the precision and the accuracy of results achieved and limits of detection of elements. It was found that the solubilisation in aqua regia gave the best results, i.e., limits of detection between 0.15 and 98.4 ng l −1 , the precision within 0.6−3.0 % and the accuracy better than 5 %. The developed method of the analysis, being a useful alternative to timeconsuming wet digestion procedures, was successfully applied to the analysis of five slim tea products.

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Section: −1supporting

confidence: 87%

Section: Slim Teasmentioning

confidence: 99%

Section: −1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Simple and Fast Sample Preparation Procedure Prior to Multi-element Analysis of Slim Teas by ICP OES

2014

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“…In the literature there is a very limited number of studies about Ba levels in herbal tea with reported range from 2 to 42 µg/g [23]. Our study on herbal tea leaves indicated Ba as 3.0±0.1 and 67.0±0.4 µg/g in the digestion and from 1.0±0.1 to 14.0±0.4 µg/g in the infusion.…”

Section: Resultsmentioning

confidence: 50%

Determination of multi element levels in leaves and herbal teas from Turkey by ICP-OES

Altıntığ¹,

Altundağ²,

Tüzen³

2014

Bull. Chem. Soc. Eth.

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ABSTRACT. We have determined the amount of some heavy metals (Al, Ba, Cr, Cu, Fe, Mn, Ni, Sr and Zn) contained in 18 herbal tea samples that had been bought from local markets where different parts of plants (leaves or flowers) are consumed especially for medical purposes in Turkey by ICP-OES. The validity of the analytical procedure was checked by analyzing INCT-TL-1 CRM certified reference material. The results from the analysis of CRM were all within the 95% reliability limit. The experiment results comply with the values reported in the literature. The wet decomposition method was used to solubilize the metals. The amount of the heavy metal that had passed to the tea via infusion has also been determined. The lowest and highest amounts of the metals found are: Al 268

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Different Fields of Applications

2014

Total‐Reflection X‐Ray Fluorescence Analysis and Related Methods

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Multielement analysis of Chinese tea ( Camellia sinensis ) by total-reflection X-ray fluorescence

Cited by 86 publications

References 0 publications

Simple and Fast Sample Preparation Procedure Prior to Multi-element Analysis of Slim Teas by ICP OES

Simple and Fast Sample Preparation Procedure Prior to Multi-element Analysis of Slim Teas by ICP OES

Determination of multi element levels in leaves and herbal teas from Turkey by ICP-OES

Different Fields of Applications

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