Sampling method for Odor

[linus2003]

How do you take a representative sample for odor analysis? I am looking spefically for any H2S odor in distribution water sample. Are there any set protocols like the ones we have for VOCs (viz. no head space, certain kind of sampling bottle, holding time, preservatives, etc.). Any input will be appreciated.

 

[ch81pc]

The method we use, which i belive is standard, is to fill a clean sample bottle to the top (with no head space. The sample should be stored at around 4 degrees C. The exact temperature at which the sample is analysed will effect the type and intensity of the odour. As a standard we warm all samples to 25 degrees C just prior to analysis. Hope this helps

 

[semo]

If you are checking for Hydrogen Sulfide you need to take the test at the well head. Do not introduce a lot of splashing when you take the sample. H2S will off gas in a bottle before the lab can use it. Splashing will also increase the off-gassing before you test it.

We use a Hach 2000 colorimeter and check for the sulfides at the well head for the best results.