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The chemical oxygen demand test is
The chemical oxygen demand test is used widely to estimate the amount of organic matter in waste water. It is a measurement of the oxygen equivalent of the materials present in tehe waste water that are subject to oxidation by a stong chemical oxydant, in this case dichromate. The ultra low range COD reagent is designed for use with water and waste water effluent samples. In the reactor digestion method test, the COD procedure is greatly simplified. 2 ml water samples are pipetted ito vials are digest at 150⁰C for two hour and cooled.then the COD determination is made with a
Because of the low measurement and sensitivity of this method t is important the container does not contribute to final COD measurement. Collect sample in gass bottles if possible. Plastics bottle can be used only o if they are known to be free of organic contamination. Biologically active sample should be tested as son as possible. Sample containing solids should to well-mixed or homoginezed to permit the removalof a representative aliquot. Note : the following storage instruction are necessary only when prompt analysis is impossible. Add two ml sulfuric acid, ACS, for each liter or quart of sample using a glass serological pipet and pipet filler. Mix. Check the sample to be sure the pH is 2 or less. Add more acid if necessary. Sample preserved in ths manner can be stored for 7 days. Where significant amounts of preservatives are used, a volume correction should be made for the extra acid by dividing the total volume (sample + acod) by the sample volume and multiplying the test result by this factor.
Because of the low measurement and sensitivity of this method t is important the container does not contribute to final COD measurement. Collect sample in gass bottles if possible. Plastics bottle can be used only o if they are known to be free of organic contamination. Biologically active sample should be tested as son as possible. Sample containing solids should to well-mixed or homoginezed to permit the removalof a representative aliquot. Note : the following storage instruction are necessary only when prompt analysis is impossible. Add two ml sulfuric acid, ACS, for each liter or quart of sample using a glass serological pipet and pipet filler. Mix. Check the sample to be sure the pH is 2 or less. Add more acid if necessary. Sample preserved in ths manner can be stored for 7 days. Where significant amounts of preservatives are used, a volume correction should be made for the extra acid by dividing the total volume (sample + acod) by the sample volume and multiplying the test result by this factor.
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The chemical oxygen demand test is used widely to estimate the amount of organic matter in waste water. It is a measurement of the oxygen equivalent of the materials present in tehe waste water that are subject to oxidation by a stong chemical oxydant, in this case dichromate. The ultra low range COD reagent is designed for use with water and waste water effluent samples. In the reactor digestion method test, the COD procedure is greatly simplified. 2 ml water samples are pipetted ito vials are digest at 150⁰C for two hour and cooled.then the COD determination is made with a Because of the low measurement and sensitivity of this method t is important the container does not contribute to final COD measurement. Collect sample in gass bottles if possible. Plastics bottle can be used only o if they are known to be free of organic contamination. Biologically active sample should be tested as son as possible. Sample containing solids should to well-mixed or homoginezed to permit the removalof a representative aliquot. Note : the following storage instruction are necessary only when prompt analysis is impossible. Add two ml sulfuric acid, ACS, for each liter or quart of sample using a glass serological pipet and pipet filler. Mix. Check the sample to be sure the pH is 2 or less. Add more acid if necessary. Sample preserved in ths manner can be stored for 7 days. Where significant amounts of preservatives are used, a volume correction should be made for the extra acid by dividing the total volume (sample + acod) by the sample volume and multiplying the test result by this factor.
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The chemical oxygen demand test is used widely to estimate the amount of organic matter in waste water. It is a measurement of the oxygen equivalent of the materials present in tehe waste water that are subject to oxidation by a stong chemical oxydant, in this case dichromate. The ultra low range COD reagent is designed for use with water and waste water effluent samples. In the reactor digestion method test, the COD procedure is greatly simplified. 2 ml water samples are pipetted ito vials are digest at 150⁰C for two hour and cooled.then the COD determination is made with a
Because of the low measurement and sensitivity of this method t is important the container does not contribute to final COD measurement. Collect sample in gass bottles if possible. Plastics bottle can be used only o if they are known to be free of organic contamination. Biologically active sample should be tested as son as possible. Sample containing solids should to well-mixed or homoginezed to permit the removalof a representative aliquot. Note : the following storage instruction are necessary only when prompt analysis is impossible. Add two ml sulfuric acid, ACS, for each liter or quart of sample using a glass serological pipet and pipet filler. Mix. Check the sample to be sure the pH is 2 or less. Add more acid if necessary. Sample preserved in ths manner can be stored for 7 days. Where significant amounts of preservatives are used, a volume correction should be made for the extra acid by dividing the total volume (sample + acod) by the sample volume and multiplying the test result by this factor.
Because of the low measurement and sensitivity of this method t is important the container does not contribute to final COD measurement. Collect sample in gass bottles if possible. Plastics bottle can be used only o if they are known to be free of organic contamination. Biologically active sample should be tested as son as possible. Sample containing solids should to well-mixed or homoginezed to permit the removalof a representative aliquot. Note : the following storage instruction are necessary only when prompt analysis is impossible. Add two ml sulfuric acid, ACS, for each liter or quart of sample using a glass serological pipet and pipet filler. Mix. Check the sample to be sure the pH is 2 or less. Add more acid if necessary. Sample preserved in ths manner can be stored for 7 days. Where significant amounts of preservatives are used, a volume correction should be made for the extra acid by dividing the total volume (sample + acod) by the sample volume and multiplying the test result by this factor.
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