analysis of biota presean in sampal of wayer
Answers
Answered by
1
ALS is a trusted partner when evaluating how pollutants are accumulated in the food chain or looking for evidence of short- or long-range transport of the said compounds.
Some of the best known examples are testing biota of eagle, seal, and fish to assess PCB levels in the Baltic sea and artic animals to prove the long-range transport of pollutants to pristine areas.
Often the testing of biota samples are done in connection with testing of other sample types such as water and/or sediments. ALS has participated in projects where water and sediments together with biota (where applicable) has been tested for all the compounds in the Water Frame Directive. Assessing levels of contaminants in biota will give a different view compared to sediments. The levels found in biota will be the so-called bioavailable fraction of the contaminants. For some compounds, or groups of compounds, the difference is more pronounced. Dioxins will show a different pattern of congeners in biota than in sediment. This is partly due to the bioavailability but also to an extent the speed of which some congeners are excreted.
Some of the best known examples are testing biota of eagle, seal, and fish to assess PCB levels in the Baltic sea and artic animals to prove the long-range transport of pollutants to pristine areas.
Often the testing of biota samples are done in connection with testing of other sample types such as water and/or sediments. ALS has participated in projects where water and sediments together with biota (where applicable) has been tested for all the compounds in the Water Frame Directive. Assessing levels of contaminants in biota will give a different view compared to sediments. The levels found in biota will be the so-called bioavailable fraction of the contaminants. For some compounds, or groups of compounds, the difference is more pronounced. Dioxins will show a different pattern of congeners in biota than in sediment. This is partly due to the bioavailability but also to an extent the speed of which some congeners are excreted.
Similar questions