Preparation of standard reference material for heavy metals in low salinity seawater

LIU Qiang; SHI Xiaolai; L&#xDC; Haiyan; ZHU Yong; WU Bin

doi:10.3969/j.issn.1001-909X.2020.03.008

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Journal of Marine Sciences ›› 2020, Vol. 38 ›› Issue (3) : 76-82. DOI: 10.3969/j.issn.1001-909X.2020.03.008

Preparation of standard reference material for heavy metals in low salinity seawater

LIU Qiang^1,2, SHI Xiaolai^*1,2, LÜ Haiyan^1,2, ZHU Yong^1,2, WU Bin^1,2

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Abstract

The preparation of standard reference material for five heavy metals in low salinity seawater was studied, which was prepared by volumetric method using the diluted seawater from oceans. The statistical results for each metal indicated that the homogeneity and stabilities were very well at 95% confidence level. Using three analytical methods including atomic absorption spectrophotometry (AAS), inductively coupled plasma mass spectrometry (ICP-MS), and anodic stripping voltammetry (ASV) the characterization was determined by a total of 9 laboratories qualified by China Metrology Accreditation (CMA). Certified standard materials were used for metrological traceability. The total average value of 9 laboratories measurements which satisfied statistical requirements was taken as the standard value. The results of standard values and uncertainties were Cu 15.2 ± 0.7 μg/L, Pb 15.3 ± 0.7 μg/L, Zn 98.9 ± 4.7 μg/L, Cd 2.02 ± 0.10 μg/L, and Cr 15.3 ± 0.6 μg/L, respectively. The developed standard reference material can be used for quantity transfer and quality control of heavy metals analysis in low salinity seawater from near shore and estuary areas.

Key words

seawater / heavy metals / standard reference material / low salinity

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LIU Qiang, SHI Xiaolai, LÜ Haiyan, ZHU Yong, WU Bin. Preparation of standard reference material for heavy metals in low salinity seawater[J]. Journal of Marine Sciences. 2020, 38(3): 76-82 https://doi.org/10.3969/j.issn.1001-909X.2020.03.008

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