Evaluation of a proficiency test on cadmium and lead in herbal material using assigned reference values

Hon, Phoebe Y.T.; Chan, Pui-kwan; Cheung, Samuel T.C.; Wong, Yiu‐chung

doi:10.1016/j.microc.2010.10.008

Cited by 9 publications

(1 citation statement)

References 23 publications

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“…However, the limited quantity and variety of CRM in the forensic field make this difficult to achieve in PT programmes on illicit drugs. Recently, we have assigned reference values using methods with high accuracy in some of our food programmes [27,28] and found that it is a useful alternative to assess participants' performance. It is believed that the approach can be applied to PT programmes in hair analysis.…”

Section: Resultsmentioning

confidence: 99%

The first international proficiency test on ketamine and norketamine in hair

Lee¹,

Cheng²,

Cheung³

et al. 2012

Forensic Science International

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Section: Resultsmentioning

confidence: 99%

The first international proficiency test on ketamine and norketamine in hair

Lee¹,

Cheng²,

Cheung³

et al. 2012

Forensic Science International

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Sequential Determination of 13 Elements in Complex Matrices by Stripping Voltammetry with Mixed Complexing Electrolytes

et al. 2015

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This paper presents the determination of 13 elements in a simultaneous and sequential analysis using solochrome violet (SVRS), chloranilic acid (CA), diethylenetriaminepentaacetic acid (DTPA), dimethylglyoxime (DMG), and oxine as complexing electrolytes. The Methods were applied to determine Al3+, Fe3+, Mo6+, Zn2+, Cd2+, Pb2+, Cu2+, Ni2+, Co2+, Tl+, U6+, V5+, and Cr6+ in fertilizers, plant materials, and foodstuffs. The Method was found to be selective and accurate (82.13–119.03 %) for elemental analysis in complex matrices that were previously submitted to a total oxidative digestion step (calcination and wet digestion). Mutual interferences of the elements were systematically investigated. The Sequential Method could be useful for the routine quality control of foodstuffs and fertilizer formulations regarding mineral nutrients or contaminants.

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Identification of possible technical problems in determination of the major inorganic constituents of brown-rice flour by evaluating proficiency test results

et al. 2013

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To support skill upgrading in analysis of inorganic constituents of environmental and food samples, the National Metrology Institute of Japan (NMIJ) and the National Food Research Institute (NFRI) have organized a proficiency test (PT) of determination of Mn, Fe, Cu, Zn, As, and Cd in brown-rice flour based on the international standard (ISO/IEC 17043:2010). One hundred and thirty-three sets of reports were assessed by use of the E(n)-number and z-score approaches in accordance with ISO/IEC 17043 and the international harmonized protocol for PT. The PT results and analytical procedures, reported in detail, were reviewed, and possible technical reasons for questionable or unsatisfactory results are discussed.

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Evaluation of a proficiency test on cadmium and lead in herbal material using assigned reference values

Cited by 9 publications

References 23 publications

The first international proficiency test on ketamine and norketamine in hair

The first international proficiency test on ketamine and norketamine in hair

Sequential Determination of 13 Elements in Complex Matrices by Stripping Voltammetry with Mixed Complexing Electrolytes

Identification of possible technical problems in determination of the major inorganic constituents of brown-rice flour by evaluating proficiency test results

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