Preparation and preliminary certification of two new Polish CRMs for inorganic trace analysis

Dybczyński, R.; Danko, B.; Kulisa, Krzysztof; Maleszewska, E.; Polkowska-Motrenko, Halina; Samczyński, Zbigniew; Szopa, Z.

doi:10.1023/b:jrnc.0000020909.67144.fc

Cited by 28 publications

(23 citation statements)

References 23 publications

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“…The method's accuracy was validated using the following certifi ed reference materials (CRM): Tea Leaves (INCT-TL-1), Mixed Polish Herbs (INCT-MPH-2) [Dybczyński et al, 2004] and Tea (NCS ZC 73014, China National Analysis Center for Iron and Steel, Beijing, China).…”

Section: Samples and Sample Preparationmentioning

confidence: 99%

Determination of Selected Trace Elements in Dietary Supplements Containing Plant Materials.

Łozak¹,

Sołtyk²,

Kiljan³

et al. 2012

Pol. J. Food Nutr. Sci.

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Section: Samples and Sample Preparationmentioning

confidence: 99%

Determination of Selected Trace Elements in Dietary Supplements Containing Plant Materials.

Łozak¹,

Sołtyk²,

Kiljan³

et al. 2012

Pol. J. Food Nutr. Sci.

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“…Data for samples were considered only if it matched with the certified values for the RMs. Mean±SD data for INCT MPH-2 along with certified/ information values [34], error percentage, relative standard deviation (RSD) percentage, and Z scores are listed in Table 3. It is observed that our data match well within ±5-10% of the certified values with the exception of a few elements such as Ce, Cl, Co, Cu, Hf, Hg, and Zn, but all Z score values are between ±1.90 except for Ce and Sm suggesting our data to be within 99% confidence limit.…”

Section: Resultsmentioning

confidence: 99%

“…These were stored in precleaned polyethylene capped bottles. RMs Peach leaves (SRM 1547) [33] and Mixed Polish Herbs (MPH-2) [34] procured from the National Institute of Standards and Technology, USA, and the Institute of Nuclear Chemistry and Technology (INCT), Poland, respectively, were used as such.…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

Availability of Essential Elements in Nutrient Supplements Used as Antidiabetic Herbal Formulations

Choudhury¹,

Reddy²,

Garg³

2007

Biol Trace Elem Res

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Five brands of antidiabetic herbal formulations as tablets, Diabetex, Divya Madhu Nashini, Jambrushila, Diabeticin, and Madhumeh Nashini, from different pharmacies were analyzed for six minor (Na, K, Ca, Cl, Mg, and P) and 20 trace (As, Ba, Br, Ce, Co, Cr, Cs, Cu, Fe, Hg, La, Mn, Rb, Sb, Sc, Se, Sm, Th, V, and Zn) elements by thermal neutron irradiation followed by high-resolution gamma ray spectrometry. Further Ni, Cd, and Pb were determined by atomic absorption spectrophotometry. Most elements vary in a narrow range by a factor of 2-4 while a few others vary in a wide range, e.g., Na (0.05-0.67 mg/g), Mn (26.7-250 microg/g), and V (0.26-2.50 microg/g). All the five brands contain K, Cl, Mg, P, and Ca as minor constituents along with mean trace amounts of Cr (2.11 +/- 0.67 microg/g), Cu (15.7 +/- 7.11 microg/g), Fe (459 +/- 171 microg/g), Mn (143 +/- 23 microg/g), Se (238 +/- 112 ng/g), and V (0.99 +/- 0.93 microg/g). Jambrushila is enriched in Na, Ca, Mg, Cl, Fe, Cu, Se, and Zn, essential nutrients responsible for curing diabetes. Dietary intake of Mn, Fe, and Cu are greater than 10% of the recommended dietary allowance, whereas that for Zn and Se is less than 2%. Mean contents of toxic elements (As, Cd, Hg, and Pb) were found below permissible limits except in Jambrushila. Cr and Zn were inversely correlated with r = -0.81, whereas Rb and Cs exhibit linear correlation (r = 0.93) in five brands. C, H, N analysis showed C approximately 55%, H approximately 12%, and N approximately 2% with a total of approximately 70% organic matter. However, thermal decomposition studies at 700 degrees C suggest less than 5% nonvolatile metal oxides. Herbal formulations contain minor and trace elements in bioavailable forms that favorably influence glucose tolerance and possibly increase the body's ability to ameliorate development of diabetes.

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“…In our laboratory the certification of the candidate reference materials is performed on the basis of world-wide interlaboratory comparison and proven data evaluation methodology [16,17,18]. The uncertainty associated with the central value combines the uncertainty due to dispersion of analytical results obtained by various methods (after rejection of outliers), i.e.…”

Section: Combined Standard Uncertaintymentioning

confidence: 99%

“…The uncertainty associated with the central value combines the uncertainty due to dispersion of analytical results obtained by various methods (after rejection of outliers), i.e. analytical variance, and the uncertainty due to estimation of long term stability of the CRM [17,18].…”

Section: Combined Standard Uncertaintymentioning

confidence: 99%

Metrological assessment of the high-accuracy RNAA method for determination of cobalt in biological materials

Polkowska-Motrenko

Danko

Dybczyński

2004

Analytical and Bioanalytical Chemistry

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The paper summarizes work on the development of the high-accuracy RNAA method for the determination of trace amounts of cobalt in biological materials. The method is based on a combination of neutron activation with selective and quantitative isolation of the analyte in a state of high radiochemical purity by use of column chromatography followed by gamma-ray spectrometric measurements. The method was devised according to a set of rules, which were formulated to obtain high accuracy of the method. The procedure has been also equipped with several criteria as key factors in quality assurance. Qualification of the high-accuracy RNAA method as a primary ratio method has been demonstrated and its usefulness in the certification of the candidate reference materials tea leaves and mixed Polish herbs is presented.

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Preparation and preliminary certification of two new Polish CRMs for inorganic trace analysis

Cited by 28 publications

References 23 publications

Determination of Selected Trace Elements in Dietary Supplements Containing Plant Materials.

Determination of Selected Trace Elements in Dietary Supplements Containing Plant Materials.

Availability of Essential Elements in Nutrient Supplements Used as Antidiabetic Herbal Formulations

Metrological assessment of the high-accuracy RNAA method for determination of cobalt in biological materials

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