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This proficiency test is part of the National Measurement Institute's (NMI's) 2019 proficiency testing program for inorganic studies.

We will dispatch the samples in October 2019. 

We are accredited for compliance with ISO/IEC 17043.

The values given are indicative, based on the range of materials used in previous rounds. We will adjust these ranges in the dispatch letter.

Sample 1: 100 mL filtered seawater (low level)

The sample is preserved in 2% HNO3 (v/m).

Dissolved elements and their approximate concentration range (ug/L):

  • Al: <50
  • Ag: <10
  • As: <10
  • Be: <10
  • Cd: <10
  • Co: <10
  • Cr: <10
  • Cu: <10
  • Fe: <50
  • Hg: <10
  • Mn: <10
  • Ni: <10
  • P: <250
  • Pb: <10
  • Se: <10
  • Sn: <10
  • Tl: <10
  • U: <10
  • V: <10
  • Zn: <10

Sample 2: 100 mL unfiltered seawater (high level)

The sample is preserved in 2% HNO3 (v/m).

Total elements and their approximate concentration range (ug/L):

  • Al: <1000
  • Ag: <50
  • As: <50
  • Ba: <100
  • Cd: <50
  • Cr: <50
  • Cu: <50
  • Fe: <200
  • Mn: <50
  • Mo: <50
  • Ni: <50
  • P: <500
  • Pb: <50
  • Sb: <50
  • Se: <50
  • Sr: <10,000
  • V: <100
  • Zn: <100
  • Zr: <50

Sample 3: 200 mL filtered frozen seawater

The analytes and their approximate concentration range (mg/L)

  • ammonia-N: <0.5
  • chloride: <25,000
  • dissolved organic carbon (dNPOC): <5
  • fluoride: <5
  • nitrate-N: <0.5
  • orthophosphate-P (FRP): <0.5
  • total dissolved nitrogen (TDN): <0.5
  • total dissolved phosphorus: <0.5
  • sulfate: <5000

Sample 4: 400 mL unfiltered frozen seawater

The analytes and their approximate concentration range (mg/L)

  • B (total): <5
  • Ca (total): <500
  • K (total): <500
  • Mg (total): <1 000
  • total Kjeldahl nitrogen, total nitrogen: <5
  • total organic carbon (as NPOC): <50
  • alkalinity to pH 4.5 as CaCO3: <500
  • total hardness (CaCO3): <5000
  • pH (at 25°C), EC (at 25°C): to be advised  

Cost

We advertise costs closer to the study date. 

How to apply

1.    Read the:

2.    Email proficiency@measurement.gov.au with your:

  • contact name
  • phone
  • postal address
  • delivery address
  • organisation
  • ABN

Read more 

Contact us

Let us know if you would like us to include any special matrix or analyte in our proficiency testing schedule.

Last updated: 24 June 2019

Content ID: 64531