Method is used to determine the concentration of dissolved hexavalent chromium [Cr(VI)] in EP/TCLP characteristic extracts and ground waters. Method A is meant for TCLP extracts and groundwaters for which the hold time is soils there is a separate extraction step before the analytical steps described in A. The Seal of the United States Environmental Protection Agency. EPA Methods A (alkaline extraction) and A (colorimetric measurement) currently constitute a pair of protocols for the measurement of Cr(VI) in.
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The two most widely circulated newspapers of Bangladesh, The Daily Star , and the Prothom Alo  have run articles on the subject. Altogether, 23 chickens were analyzed. Average amounts of Cr VI present in these body parts were in the order: Digestion of samples was carried out both manually and by using an automatic digester, model: If you are the author of this article you still need to obtain permission to reproduce the whole article in a third party publication with the exception of reproduction of the whole article in a thesis or dissertation.
For spectrophotometric measurements, at least 5 readings were taken for the absorbance of the sample after appropriate treatment. Special thanks are due to Mr. Fetching data from CrossRef. The details of procedure have been described elsewhere . Dhaka has the highest value for brain.
The third option of stopping altogether the production of poultry feed from solid tannery waste may not epq economically attractive. Both method A and method have detected 71966a amounts of Cr VI in some albumen and yolk. EPA Method uses ion chromatography to separate the chromate ion from epz species by passing through a chromatographic column.
Development of a standard reference material for Cr VI in contaminated soil S. In addition, the samples were kept cool and in the dark during transportation. Most of the brain samples gave negative results. If you are the author of this article you do not need to formally request permission to reproduce figures, diagrams etc. Inorganic substances are not that likely to be present in significant quantities.
A Sattar, Chief Chemist, Mr.
Concern over the carcinogenic potential of this chromium species, and its environmental mobility, has resulted in efforts to remediate these waste sites. If you are not the author of this article and you wish to reproduce material from it in a third party non-RSC publication you must formally request permission using Copyright Clearance Center.
In addition to liver, other body parts of chicken such as gizzard, flesh and brain have been brought under investigation. Most of the high values of Cr VI have come from chickens of relatively mature age 1 year and abovebut there are exceptions.
Development of a standard reference material for Cr VI in contaminated soil. From this calculation, it seems obvious that on an average, most people of Bangladesh are taking great risk in consuming chicken and eggs. Adjustment of pH was checked using a pH meter, model: This is an alarming situation.
Therefore, no absorbance data have been recorded against these samples.
The highest value for Cr VI in 7169a liver as found in the present study is in general agreement with literature values . Standard solutions of potassium dichromate were used to calibrate the spectrophotometers. Rochester, New York Laboratory. In addition, 4 albumen and 3 yolk samples have also been analyzed. Over the last several decades, considerable contamination by hexavalent chromium has resulted from the land disposal of Chromite Ore Processing Residue COPR. The collected samples were brought to the laboratory; eoa were 7169a and stored under proper conditions in a freezer below 4 o C, until they were handled further.
In all cases the Ref. The sample was digested in the automatic digester, where the parameters like temperature, pressure and time of digestion were fixed beforehand. Brain is small in size and mainly contains lipid. Cr VI has to be eliminated from the feed eepa appropriate treatments. Back to tab navigation Download options Please wait This may take some time to load. Shamima Parvin is an M. If you have suggestions for improvement, we would enjoy hearing from you.