A new paper sensor method for field analysis of acid volatile sulfides in soils

Environ Toxicol Chem. 2018 Dec;37(12):3025-3031. doi: 10.1002/etc.4279. Epub 2018 Nov 15.

Abstract

Monitoring of biogenic sulfide is important because acid volatile sulfides (AVS) represent a reactive pool responsible for immobilization of toxic metals. We propose a new sulfide paper sensor method for semiquantitative determination of AVS in which developed color is compared to a reference chart. The method was validated against the ion-selective microelectrode and the purge-and-trap methods. For fieldwork, readings should fall within 1 to 10 μmoles S2- . Considering that the volume of soil used ranged between 1 and 16 cm3 , the corresponding soil sulfides concentration range spans from 0.06 to 10 mmoles S2- cm-3 . The sulfide paper sensor method is highly suitable for field screening and has sensitivity levels comparable to laboratory methods. Environ Toxicol Chem 2018;37:3025-3031. © 2018 SETAC.

Keywords: Acid volatile sulfides; Colorimetric charts; Field monitoring; Paper sensor; Soil analysis; Sulfide.

MeSH terms

  • Acids / analysis*
  • Color
  • Environmental Monitoring / instrumentation*
  • Ion-Selective Electrodes
  • Linear Models
  • Microelectrodes
  • Soil / chemistry*
  • Soil Pollutants / analysis*
  • Sulfides / analysis*
  • Time Factors
  • Volatilization

Substances

  • Acids
  • Soil
  • Soil Pollutants
  • Sulfides