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Custom Reference Standards

AOF/TOF and TOX/AOX

Pre-Packed GAC Columns and Consumables 

Comprehensive solutions for adsorption-based analysis, including AOF (EPA Method 1621), TOX, and AOX workflows.. 


CPI International manufactures pre-packed GAC columns and consumables used in adsorption-based analytical methods for total organic fluorine (AOF), total organic halogens (TOX), and adsorbable organic halogens (AOX).

  • Consistent, low-background adsorption performance
  • Broad compatibility across leading analyzer platforms
  • Reliable supply with shorter lead times
  • Lower cost per test compared to typical market alternatives

Essential consumables. One source. Ready when you are.


Fluoride Standard 0.8 µg/mL, 500 mL
Item Number 4400-22224-500
54.00 54.0 USD
Sodium Thiosulfate 0.01N, Standardized
Choose from 1L, 4L, and 20L volumes. ​
0.0 USD
Water Blank for ICP/IC Analysis, High Purity, 18 Megaohm
Choose from 500 mL, 1 L, and 4 L volumes.
0.0 USD