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Research Roundup Sampling and Analysis 2 (AIHce EXP 2021 OnDemand)
Course Description:
Recorded at AIHce EXP 2021

Temporal and Spatial Variations of Trichloramine and Trichloromethane Levels in Four Indoor Swimming Pools and Validation of New Trichloramine 8-hours Sampling Method

Exposure to airborne disinfection by-products, especially trichloramine (TCA) and trichloromethane (TCM), may cause various adverse occupational health effects in indoor swimming pools. This study aims to evaluate the spatial and temporal variation in TCA and TCM concentrations within and between swimming pools. Workplace measurements were carried out at four indoor swimming pools in Quebec (Canada). Sampling started two hours before the swimming pools opening time and continued until two hours after closing time. Three hundred and nine TCA and TCM air samples were collected. For each test, total TCA and TCM concentrations, temperature, humidity, and CO2 concentrations were measured simultaneously. The results showed that both TCA and TCM exposure have spatial and temporal variations. The observed daily variation in TCA and TCM concentration indicated that the common practice of collecting a single 2-hour measurement cannot be representative of the daily pool contamination levels and full-shift worker exposure. However, the cost of TCA and TCM tests may limit the number of samples collected during an assessment. This study recommends a new 8-hour sampling strategy using a cassette with three impregnated filters as a valid and cost-effective solution for time-weighted average (TWA), TCA occupational exposure assessments.

Co-Authors: -Ahmadpour,Elham* -Valois, Isabelle* -Halle, Stephane (Mechanical engineering Department of ETS, University of Quebec, Montreal, Canada) -Ryan, Patrick Eddy* -Thuot, Ross * - El Aroussi, Badr* - Haddad , Sami* -Debia, Maximilien* * Department of Environmental and Occupational Health of the University of Montreal,Montreal, Canada
Presenter/Author: Elham Ahmadpour; Montreal University; Montreal, Quebec; Canada

Stability Study and Improved Method Development for Sampling and Analysis of 1,3,5-Triglycidyl isocyanurate (TGIC)
An improved method for sampling TGIC on uncoated glass fiber filters and analysis using gas chromatography with flame ionization detector (GC-FID) is presented here. In the OSHA sampling and analytical method OSHA PV2055, samples are collected on hydrobromic acid (HBr) coated glass fiber filters.[1] It was suspected that there may not be enough gaseous HBr left for the derivatization. Our investigation proved that most of the TGIC remain underivatized in the samplers and require additional HBr to obtain the TGIC-HBr derivative. This change in the extraction procedure improved the analyte recovery. Since TGIC mostly remains underivatized in the HBr coated filters, it was decided to collect the TGIC using uncoated glass fiber filters. Collection of TGIC samples on uncoated glass fiber filters help to qualitatively identify underivatized TGIC using GC-mass spectrometer (GC-MS). It was also observed that the TGIC powder obtained from different suppliers is stable for 12 -15 years.

Co-Authors: Philip A. Smith
Presenter/Author: Radha Ukkiramapandian; OSHA; Murray, UT

Contact Hours:
1

Presentation Date:
05/25/2021

Session recordings are available for 90 days from purchase.


Stock #: AOD21_I1
ISBN #: 
Author/Editor: 

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