206-632-6206 info@brooksapplied.com

Arsenic Speciation (As)

Rice FieldThe experience of Brooks Applied Labs comes into play when arsenic speciation in difficult matrices is to be determined. We have developed a variety of different arsenic testing methods that utilize different chromatographic separation modes. These methods allow us to provide the lowest detection limits to our clients for their toughest samples. For instance, arsenic speciation in a 10,000 ppm Fe, Ca, Al and high sulfate matrix or highly saline samples (up to 3%) can be determined with ppt detection limits.

The most important variable associated with sampling for arsenic testing is to maintain sample integrity. Immediately after any sample is removed from its ambient environment the equilibrium may change inducing species conversion. Identification of proper sampling protocols cannot be identified without first understanding the environment the sample is being extracted from. Many variables can assist in identifying sample protocols including, but not limited to: other metals concentrations, redox, pH, concentration of organics, and structure of environment (air, water, soil, tissue, etc.). Generic application of any sample preservation protocol for arsenic speciation analysis will ultimately result in highly biased results that will eventually cost time and money to the client.

At Brooks Applied Labs, we have both the innovation and the expertise to provide you with ultra-low arsenic and arsenic speciation analyses for virtually any matrix type. Please contact us to find out which arsenic test is the appropriate method choice for your samples.

Arsenic Species Analyzed by EPA Method 1632

  • Inorganic Arsenic (InorgAs)
  • Arsenite/Trivalent Arsenic [As(III)]
  • Arsenate/Pentavalent Arsenic [As(V)]
  • Monomethylarsonic Acid (MMAs)
  • Dimethylarsinic Acid (DMAs)

Selected Arsenic Species Supported by Hyphenated ICP-MS Techniques

  • Inorganic Arsenic (InorgAs)
  • Arsenite/Trivalent Arsenic [As(III)]
  • Arsenate/Pentavalent Arsenic [As(V)]
  • Monomethylarsonic Acid (MMAs)
  • Dimethylarsinic Acid (DMAs)
  • Arsenobetaine (AsB)
  • Arsenocholine
  • Trimethylarsine oxide
  • Tetramethylarsonium
  • Hexafluoroarsenate
  • Arsenolipids (polar and non-polar)
  • Arsenosugars (sulfur and phosphorous analogues)
  • Roxarsone
  • p-Arsanilic acid
  • Arsenopropionate
  • 4-Hydroxy phenlarsonic acid
  • 3-Amino-4-hydroxyphenylarsonic acid
  • 4-Aminophenylarsonic acid
  • Nitarsone
  • Phenylarsonic acid
  • Various Arseno-thiols
  • Others (Please inquire.)

Matrices Supported

  • Water (wastewater, surface water, well water, seawater, impacted water, industrial process water, mine runoff)
  • Soil
  • Sediment
  • Coal Combustion Byproducts (e.g. fly ash)
  • Tissue (nearly all)
  • Food (nearly all vegetable, meat, and grains)
  • Nearly all aquatic organisms
  • Nearly all terrestrial organisms
  • Cosmetics
  • Pharmaceuticals (API and final Drug Formulations)
  • Nutraceuticals
  • Supplements
  • Textiles
  • Paint
  • Solvents
  • Chemicals (acids, bases, etc.)
  • Air