Analysis technique of trihalomethanes by GC-FID device

Shayesteh, Keivan; Karimi, K.; Sepehri, Nabiollah; Mozafari, Zohreh

doi:10.30473/ijac.2025.76092.1327

Document Type : Full research article

Authors

¹ گروه مهندسی شیمی، دانشکده فنی و مهندسی، دانشگاه محقق اردبیلی، اردبیل، ایران

² PhD Student, Dept. of Chemical Engineering, Faculty of Engineering,University of Mohaghegh Ardabili, Ardabil, Iran

³ Expert in Charge of Chemical and Device Laboratories, Shiraz Water and Wastewater Company, Shiraz, Iran

⁴ Quality Monitoring and Control Director, Shiraz Water and Wastewater Company, Shiraz, Iran

10.30473/ijac.2025.76092.1327

Abstract

In water chlorination for removing pathogens, trihalomethanes (THMs) are among the significant carcinogenic by-products of drinking water chlorination. The conventional measurement means for these compounds is a GC device with an ECD detector (GC-ECD) or GC/MS. A GC-ECD or a GC/MS is utilized for analyzing THMs at the microgram per liter scale. Purchasing an ECD detector is not easy or cost-effective. This article introduces a new concentration method using the Head Space technique in a GC-FID device for measuring the concentration of THMs. In this method, four compounds, chloroform (CHCl3), di-bromochloromethane (CHClBr2), bromodichloromethane (CHCl2Br) and bromoform (CHBr3), are plotted on a 5-point calibration chart after being measured on a microgram per liter scale. This method, designed in a laboratory, can be used to measure concentrations and analyze data in the laboratories of water and wastewater, environment, petroleum and petrochemistry, etc. High accuracy of the method (µg/L) is the main feature of this method. Here, the design method and advantages of this method are presented with diagrams and tables.

Keywords

References

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Iranian Journal of Analytical Chemistry

Analysis technique of trihalomethanes by GC-FID device

References

References

Volume 12, Issue 1 - Serial Number 23
March 2025
Pages 109-122

Analysis technique of trihalomethanes by GC-FID device

References

References

Volume 12, Issue 1 - Serial Number 23March 2025Pages 109-122

Volume 12, Issue 1 - Serial Number 23
March 2025
Pages 109-122