Environment Testing >> Testing Services >> Metals and Metals Speciation

Metals and Metals Speciation

Sidebar Image

gas chromatograph

Eurofins specializes in the determination and characterization of trace metals in air, soil, water, sediments and tissues and has produced innovative and reliable analytical methods that are utilized around the world.

While analytical techniques for trace metals speciation have been around for over a decade, few laboratories possess the expertise to apply these techniques for various commercial applications. Eurofins has been providing elemental speciation analytical services since 1991 and has continued to create and implement several unique tools and applications for our clients. Our innovative analytical methods, combined with ultra-clean laboratory and sample-handling techniques, allow us to provide you with the lowest and most reliable reporting limits available, even in the most complicated samples.

Trace metals can be further differentiated from their total elemental composition into different redox species, organometallic compounds, complexes, or precipitates/minerals. This differentiation is the basis of metal speciation. Each species of a specific element has different chemical and physical properties sometimes with profound differences in mobility, bioavailability, and/or toxicity. Investigating the speciation of metals can provide valuable information on the toxicity and mobility of the trace metals to living organisms and troubleshooting metals removal from systems such as water treatment.

While analytical techniques for trace metals speciation have been around for over a decade, few laboratories possess the expertise to apply these techniques for various commercial applications. Eurofins has been providing elemental speciation analytical services since 1991 and has continued to create and implement several unique tools and applications for our clients.

Eurofins offers speciation in a variety of matrices using the following methods and techniques:

  • As Speciation (As3/As5)
    • EPA 1632
  • Methyl Mercury
    • EPA 1630
  • DiMethyl Mercury
    • EPA 1630 Mod
  • Elemental Mercury
    • EPA 1631 Mod
  • Inorganic Mercury
    • EPA 1631 Mod
  • Hg Selective Sequential Extraction (F0-F6)
    • EPA 1631 Mod
  • Hexavalent Chromium in Water
    • EPA 7196
  • Hexavalent Chromium in Water
    • SM3500-Cr
  • Other speciation via LC-ICPMS or LC-AFS including Se, As, V, Mo, Co

The most common speciation techniques that we perform are for arsenic, selenium and mercury speciation as outlined below. We have also developed applications to speciate other metals such as Chromium, Vanadium, Cobalt, Molybdenum, Antimony and Bismuth. 

Arsenic Speciation

Selenium Speciation

Mercury Speciation

Inorganic arsenic species Inorganic selenium species Inorganic mercury species
AS(III) or Arsenite (AS+3) Se(IV) or Selenite (Se+4) Hg(0) or Elemental Mercury
AS(V) or Arsenate (AS+5) Se(VI) or Selenate (Se+6) Hg(I)

Total Inorganic Arsenic
or TIAs (AS+3+AS+5)

Total Inorganic Selenium TISe (Se+4+Se+6) Hg(III)
Organometallic arsenic compounds Organometallic selenium compounds Total Inorganic Mercury TIHg (Hg0+Hg+1+Hg+2)
Monomethylarsonic acid (MMA) Selenomethionine Organometallic mercury 
compounds
Dimethylarsinic adic (DMA) Selenomethylcysteine Methyl mercury (MeHg)
Roxarsone Selenocyanides Dimethyl mercury (DMHg)
Arseno sugars Selenocyanate Mercury Complexes
Arsenobetaine   HgCl, HgO, HgS, HgAu, HgSe
Arsenocholine   Mercury in Crystal Lattices