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Mining activities that disturb sulfide-rich rocks, particularly those containing pyrite (FeS₂), initiate a cascade of geochemical and microbiological processes with serious environmental implications. When exposed to air and water, pyrite undergoes oxidation, releasing sulfate, ultimately forming sulfuric acid and mobilizing heavy metals into surrounding water systems. This phenomenon, known as acid mine drainage (AMD), results in low pH waters laden with toxic elements that threaten...
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Related Experiment Video

Updated: Apr 30, 2026

Determination of Inorganic Arsenic in a Wide Range of Food Matrices using Hydride Generation - Atomic Absorption Spectrometry.
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Total arsenic in rice milk.

Ron Shannon1, Jose M Rodriguez

  • 1a Mississippi State Chemical Laboratory , Mississippi State University , Mississippi State , MS , USA.

Food Additives & Contaminants. Part B, Surveillance
|May 1, 2014
PubMed
Summary

Rice milk samples contained concerning levels of total arsenic, ranging from 2.7 to 17.9 µg L(-1). This highlights a need for regulatory guidelines on arsenic in rice products, especially in Mississippi.

Area of Science:

  • Food Science
  • Environmental Health
  • Analytical Chemistry

Background:

  • Rice milk and its by-products lack clear regulatory classification as food, water, or milk substitute.
  • Existing regulations for total arsenic concentrations in drinking water (10 µg L(-1)) by EPA, EU, and WHO do not directly apply to rice products.
  • There is a lack of specific guidelines from the EU and US regulatory agencies regarding total arsenic concentrations in food products.

Purpose of the Study:

  • To quantify total arsenic concentrations in rice milk and its by-products.
  • To establish a baseline for addressing arsenic contamination issues in rice products within Mississippi, USA.
  • To inform the development of potential regulatory guidelines for arsenic in rice-based foods.

Main Methods:

Keywords:
health concernsregulationsrice milktotal arsenic

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  • Analysis of total arsenic concentration in rice milk and by-products.
  • Utilized graphite-furnace atomic absorption spectrometry for precise arsenic quantification.
  • Collected samples to represent a range of rice milk products.

    • Main Results:

    • Total arsenic concentrations in tested rice milk and by-products ranged from 2.7 ± 0.3 to 17.9 ± 0.5 µg L(-1).
    • Some samples exceeded the established limit for total arsenic in drinking water (10 µg L(-1)).
    • Variability in arsenic levels suggests potential differences in sourcing or processing.

    Conclusions:

    • The study identifies a need for further investigation into arsenic levels in rice milk and its by-products.
    • Findings support the development of specific guidelines for total arsenic in rice-based foods.
    • This research serves as a critical starting point for regulatory action in Mississippi.