Preparation and certification of Hijiki reference material, NMIJ CRM 7405-a, from the edible marine algae hijiki (Hizikia fusiforme)

Abstract

A certified reference material, NMIJ CRM 7405-a, for the determination of trace elements and As(V) in algae was developed from the edible marine hijiki (Hizikia fusiforme) and certified by the National Metrology Institute of Japan (NMIJ), the National Institute of Advanced Industrial Science and Technology (AIST). Hijiki was collected from the Pacific coast in the Kanto area of Japan, and was washed, dried, powdered, and homogenized. The hijiki powder was placed in 400 bottles (ca. 20 g each). The concentrations of 18 trace elements and As(V) were determined by two to four independent analytical techniques, including (ID)ICP-(HR)MS, ICP-OES, GFAAS, and HPLC-ICP-MS using calibration solutions prepared from the elemental standard solution of Japan calibration service system (JCSS) and the NMIJ CRM As(V) solution, and whose concentrations are certified and SI traceable. The uncertainties of all the measurements and preparation procedures were evaluated. The values of 18 trace elements and As(V) in the CRM were certified with uncertainty (k = 2).

Development of a Certified Reference Material (NMIJ CRM 7203-a) for Elemental Analysis of Tap Water

“…3 As a section of the National Metrology Institute of Japan (NMIJ), the authors' group has developed various CRMs for the analysis of food and environmental samples. [4][5][6][7][8][9][10][11][12] Before the development of the present CRM, there was no CRM developed with local tap water of Japan as the raw material. In the present work, local tap water was used as the raw material to prepare the CRM, which ensured the similarity of the matrix to the target sample in applications of the present CRM.…”

Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour

“…The method has been used for rice flour, fish and shellfish, and biological samples that contain a range of arsenic species. [22][23][24][25][26][27][28][29][30][31][32][33][34] However, the peaks for As(III) and MMAA are very close together, as are those for DMAA and AsB, and TMAO and TeMA. If many analyses are carried out on one column, some degradation of the packing might occur and these pairs of peaks would possibly not be separated.…”

Inorganic Arsenic Determination in Food: A Review of Analytical Proposals and Quality Assessment Over the Last Six Years

“…The other is hijiki seaweed (NMIJ CRM 7405a) which is also certified for tAs, and other arsenic species have been reported. 236 Inorganic arsenic results available from the literature for these CRMs in the period 2010-2015 are shown in Table 2. The type of food, supplier, certified values, tAs reported, method, and measurement technique for iAs determination are also shown.…”