SLEW-3: Estuarine water reference material for trace metals

The following table shows the metals for which certified values have been established. Certified values are based on the results of determinations by at least two independent methods of analysis.

Table 1: Certified quantity values

Element Mass Fraction,
μg/kg
Mass Concentration,
μg/L
Arsenic (o,n,r) 1.34 ± 0.09 1.36 ± 0.09
Cadmium (i,m,q,r) 0.047 ± 0.004 0.048 ± 0.004
Chromium (m,o,r) 0.181 ± 0.019 0.183 ± 0.019
Cobalt (o,q,r) 0.040 ± 0.010 0.042 ± 0.010
Copper (i,m,o,q,r) 1.53 ± 0.12 1.55 ± 0.12
Iron (i,m,r) 0.561 ± 0.058 0.568 ± 0.059
Lead (m,o,q,r) 0.009 ± 0.0014 0.009 ± 0.0014
Manganese (b,d,i,m,q) 1.59 ± 0.22 1.61 ± 0.22
Molybdenum (b,c) 5.1 Table 1 note 1 5.1 Table 1 note 1
Nickel (i,m,o,q,r) 1.21 ± 0.07 1.23 ± 0.07
Uranium (m) 1.8 Table 1 note 1 1.8 Table 1 note 1
Vanadium (q,r) 2.54 ± 0.31 2.57 ± 0.31
Zinc (i,m,o,q) 0.198 ± 0.037 0.201 ± 0.037

Table notes

Table 1 note 1

An information value is listed due to insufficient information to accurately assess uncertainties.

Return to table 1 note 1 referrer

Coding

The coding refers only to the instrumental method of analyte determination.

  • b - Direct determination by inductively coupled plasma mass spectrometry (ICPMS)
  • c - Direct determination by isotope dilution inductively coupled plasma mass spectrometry (ICPMS)
  • d - Direct determination by graphite furnace atomic absorption spectrometry (GFAAS)
  • i - Immobilized ligand separation, GFAAS determination
  • m - Immobilized ligand separation, isotope dilution ICPMS
  • n - In situ hydride generation, GFAAS determination
  • o - Co-precipitation, ICPMS determination
  • q - Immobilized ligand separation, ICPMS determination
  • r - Co-precipitation separation, GFAAS determination

Intended Use

This certified reference material is primarily intended for use in the calibration of procedures and the development of methods used for the analysis of seawater for trace metals.

SLEW-3

Date of issue: June 2000
Date of expiry: December 2019
Revised: January 2015 (expiry date extended, layout and editorial changes, March 2016 (editorial update), February 2017 (expiry date extended), August 2018 (expiry date extended), October 2018 (expiry section removed)

Date modified: