Standard Practice for Preparation of Water Samples with High, Medium, or Low Suspended Solids for Identification and Quantification of Microplastic Particles and Fibers Using Raman Spectroscopy, IR Spectroscopy, or Pyrolysis-GC/MS

Importancia y uso:

5.1 Large volumes of water are required to be sieved for accurate quantification of microplastics. Water with high to medium content of suspended solids can lead to an excess of inorganic and organic background material which can interfere with the ability to conduct reliable analyses. The presence of this background material can often impede the ability to accurately discern, distinguish and identify the number of microplastic particles in solution.

5.2 The digestion described in this procedure allows for significant reduction of interfering substances and contaminants, rendering a sample suitable for particle and fiber characterization and identification using either Raman and IR spectroscopic analysis or for polymeric quantification and identification by Pyrolysis-GC/MS.

5.3 For water samples with medium to low suspended solids, the oxidation and digestion steps necessary will be dependent upon the type and nature of interfering substances and contaminants and may be determined through simple trial efforts.

Subcomité:

D19.06

Referida por:

D8402-23, D8489-23E01, D8401-24

Volúmen:

11.02

Número ICS:

13.060.01 (Water quality in general), 83.080.01 (Plastics in general)

Palabras clave:

all water matrices; analytical quality assurance; calibration samples; collection procedures; count-based; drinking water; high turbidity waters; low turbidity waters; mass-based; microplastic pollution measurement; microplastics; proficiency samples; quality assurance; quality control; quantification procedures; reference samples; sample preparation; sampling procedures; suspended solids; wastewater;