@article{
 title = {Methylmercury in fish and hair samples from the Balbina reservoir, Brazilian Amazon},
 type = {article},
 year = {1998},
 identifiers = {[object Object]},
 keywords = {E0757,GBMS},
 pages = {84-90},
 volume = {77},
 id = {54391193-e41c-3e7f-88ca-f3b9f8fb25a1},
 created = {2020-12-21T14:33:44.079Z},
 file_attached = {false},
 profile_id = {40b8da15-8b94-3c9c-9b32-24fe57ca7cb3},
 group_id = {3addd0f7-d578-34d3-be80-24022cc062a1},
 last_modified = {2020-12-21T14:33:47.990Z},
 read = {false},
 starred = {false},
 authored = {false},
 confirmed = {true},
 hidden = {false},
 folder_uuids = {4246fe96-2389-417f-9056-527e16d7e71c},
 private_publication = {false},
 abstract = {The present study aimed to evaluate methylmercury in fish and human hair samples from an important hydroelectrical reservoir, Balbina (Brazil, Amazon). It presents a quite intense fishing activity and there is no known goldmining activity in its watershed. Fish and human hair were analyzed with a new extraction technique and measured by GC-ECD. Analytical quality was checked through intercomparisons between two laboratories with local samples and certified standards from IAEA. Methylmercury in hair ranged from 2.0 to 21.6 μg · g-1 with a mean of 8.76 ± 5.20 μg · g-1 (N = 20), while the methylmercury percentages were above 90. Fish presented methylmercury levels ranging from 0.03 to 0.9 μg · g-1 wet wt with a mean of 0.24 ± 0.18 μg · g-1 wet wt (N = 32), which is below the limit established for food by Brazilian legislation (0.5 μg · g-1 wet wt) and methylmercury mean percentages were above 95%. The total mean daily methylmercury intake ranged from 11 to 55 μg for 70% of the sampled population from the village based on a daily consumption of about 110 g of fish with methylmercury concentrations in the range of 0.1 to 0.5 μg · g-1. This calculation is consistent with methylmercury concentrations in hair samples in the range of 2.6 to 13.1 μg · g-1.},
 bibtype = {article},
 author = {Kehrig, Helena do Amaral and Malm, Olaf and Akagi, Hirokatsu and Guimarães, Jean R.D. and Torres, João Paulo M.},
 journal = {Environmental Research},
 number = {2}
}

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It presents a quite intense fishing activity and there is no known goldmining activity in its watershed. Fish and human hair were analyzed with a new extraction technique and measured by GC-ECD. Analytical quality was checked through intercomparisons between two laboratories with local samples and certified standards from IAEA. Methylmercury in hair ranged from 2.0 to 21.6 μg · g-1 with a mean of 8.76 ± 5.20 μg · g-1 (N = 20), while the methylmercury percentages were above 90. Fish presented methylmercury levels ranging from 0.03 to 0.9 μg · g-1 wet wt with a mean of 0.24 ± 0.18 μg · g-1 wet wt (N = 32), which is below the limit established for food by Brazilian legislation (0.5 μg · g-1 wet wt) and methylmercury mean percentages were above 95%. The total mean daily methylmercury intake ranged from 11 to 55 μg for 70% of the sampled population from the village based on a daily consumption of about 110 g of fish with methylmercury concentrations in the range of 0.1 to 0.5 μg · g-1. 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