Determination of trace elements in environmental reference material Tea Leaves by instrumental NAA.

Suzuki, Shohgo; Matumoto, Kisayo; Okada, Yukiko; Hirai, Shoji

doi:10.2116/bunsekikagaku.35.12_993

Cited by 10 publications

(3 citation statements)

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“…The analytical results for diverse elements are summarized in Table 5, along with the certified values informed from NIST or NIES and the reference values cited from the literature. 16,17 It can be seen in Table 5 that diverse elements in plant reference materials are over a wide concentration range at the major-to-ultratrace levels. The values in Ref.…”

Section: Determination Of Diverse Elements In Plant Reference Materialsmentioning

confidence: 99%

“…Therefore, the certification work for REEs in Pine Needles, Tomato Leaves and Tea Leaves examined here is urgently required in order to propose the certified values. Some information or reference values 16,17 are given in Table 6. Here, the reference values for Pine Needles and Tomato Leaves are the consensus values, 16 and the number of cited literatures used to calculate these consensus values in Ref.…”

Section: Determination Of Rare Earth Elements In Plant Reference Matementioning

confidence: 99%

“…The RD values compared to the reference values 16 were smaller than ±10% for La, Sm, Gd and Tb, between ±10 -20% for Ce and Nd, and larger than ±20% for Eu and Tm. In the case of Tea Leaves, the analytical values were compared to the reference values determined by INAA, 17 and the RDs for La, Ce, Tb and Yb were larger than ±20%.…”

Section: Determination Of Rare Earth Elements In Plant Reference Matementioning

confidence: 99%

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Multielement Determination of Major-to-Ultratrace Elements in Plant Reference Materials by ICP-AES/ICP-MS and Evaluation of Their Enrichment Factors

2000

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The multielement determination of major-to-ultratrace elements in plant reference materials (SRM Pine Needles, SRM Tomato Leaves, and NIES Tea Leaves) was carried out by ICP-AES (inductively coupled plasma atomic emission spectrometry) and ICP-MS (inductively coupled plasma mass spectrometry). The plant sample was decomposed with nitric acid and hydrofluoric acid in a Teflon beaker on a hot plate. The digest was dissolved in 1 M HNO3 solution, and then subjected to elemental analyses. As a consequence, the analytical data for about 40 elements including rare earth elements (REEs) were obtained over a wide concentration range, for example, from 49600 µg g −1 of Ca to 6.2 ng g −1 of Lu in Tomato Leaves. The enrichment factors, which were estimated by normalizing the observed concentrations of analyte elements in plant reference materials to their soil abundances, were evaluated in order to discuss the relative abundances of various elements between plants and soil. It was found that most of the elements, except for REEs in Pine Needles and Tea Leaves, were significantly accumulated in the plant reference materials. In particular, the essential elements (K, Mg, Ca, Mn, Cu, Zn, B and P) for plant growth provided large enrichment factors.

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Section: Determination Of Diverse Elements In Plant Reference Materialsmentioning

confidence: 99%

Section: Determination Of Rare Earth Elements In Plant Reference Matementioning

confidence: 99%

Section: Determination Of Rare Earth Elements In Plant Reference Matementioning

confidence: 99%

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Multielement Determination of Major-to-Ultratrace Elements in Plant Reference Materials by ICP-AES/ICP-MS and Evaluation of Their Enrichment Factors

2000

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K and Ca content of fresh green tea, black tea, and tea residue determined by X-ray fluorescence analysis

Nas

Gökalp

Şahin

1993

Z Lebensm Unters Forch

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X-Ray fluorescence (XRF) can be successfully used for the qualitative and quantitative elemental analysis of various agricultural products. Its simplicity, high throughput and the possibility of automation make it useful for screening large numbers of samples. The K and Ca content of 138 samples of fresh green tea, black tea and black tea residues were determined by applying the XRF system. Such a method of mineral analysis of food products is not very common. Tea from different tea-growing areas of Turkey, green tea of different shooting periods, black tea processed at different tea plants and tea residues from these black tea were analysed. The K content of green tea, processed black tea and tea residues after brewing were found to have ranges of 19,049-26,254 mg/kg, 21,904-26,883 mg/kg and 9,468-13,778 mg/kg, respectively. In the same samples the Ca content was determined as 3,580-4,799 mg/kg, 3,370-4,823 mg/kg, and 3,743-5,733 mg/kg, respectively. These findings were compared with the results of atomic emission techniques and it was concluded that the XRF system could be effectively used for quantitative analysis of the K and Ca content of tea samples.

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Analysis by nuclear reactions and activation

Bujdosó

1989

Journal of Radioanalytical and Nuclear Chemistry, Articles

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Determination of trace elements in environmental reference material Tea Leaves by instrumental NAA.

Cited by 10 publications

References 0 publications

Multielement Determination of Major-to-Ultratrace Elements in Plant Reference Materials by ICP-AES/ICP-MS and Evaluation of Their Enrichment Factors

Multielement Determination of Major-to-Ultratrace Elements in Plant Reference Materials by ICP-AES/ICP-MS and Evaluation of Their Enrichment Factors

K and Ca content of fresh green tea, black tea, and tea residue determined by X-ray fluorescence analysis

Analysis by nuclear reactions and activation

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