An investigation was conducted to compare two approaches for water sampling and
two analytical methods for trihalomethane (THM) determination in drinking water. Results of this
study showed that the sampling protocol is critical for accurate THM determination.
Samples collected for THM analysis should be adjusted to pH 4.5 or lower at the
time of sampling to preserve stability of trihalomethanes. More THMs were formed
after sampling in non pH-adjusted samples. The differences were more significant
for samples collected at the plant than in the distribution system. The analytical
method (liquid-liquid extraction or Purge and Trap) did not affect the quantification
of THMs in pH-adjusted samples. This study reinforces the need for standardization
of sampling protocols to prevent inaccurate determination of THMs and other
disinfection byproducts in drinking water. Includes 12 references, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 230 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 8 |
| Published : | 11/01/2005 |
