ASTM D – Free download as PDF File .pdf), Text File .txt) or read online for free. New ASTM Method D With the manufacture of Freon banned by the Montreal Protocol in , the old ASTM method (D ) that used infrared. The FT-IR Environmental Hydrocarbons ASTM D Application Pack contains all of the resources and components necessary to perform efficient analysis of.
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Calibration NOTE 3—The cell s used for calibration must be initially thoroughly cleaned with solvent and dried prior to beginning the calibration procedure.
ASTM D – standard test method by Infrared Determination
The replicates may be interspersed with samples. If a concentration other than astn recommended concentration is used, refer to Sstm D for information on applying the F test and t test in evaluating the acceptability of the mean and standard deviation.
NOTE 8—The amount of silica gel needed has been estimated at 3 g for every mg of polar material. Those not adsorbed are measured as nonpolar material.
Mix equal volumes of concentrated HCl and water 8. Be sure to record the concentration added to each replicate.
However, all traces of methylene chloride or other solvent must be removed so that they do not compromise the measurement. Do not rinse the sample bottle with the sample to be analyzed. Under asm circumstances, one of the following remedies must be employed: For double-beam operation, either block the light beam from the reference cell containing solvent or remove the reference cell from the instrument during the intervals between scans in order to protect the solvent from unnecessary warming.
Cool cell to room temperature before use. Do not attempt to proceed since accurate, quantitative results for the test are not obtainable. Spike an aliquot of the sample with a known 6 Where: Similarly, this test method de?
If the concentration of oil and grease exceeds the calibration range, dilute extract to bring sample within calibration range.
The LCS can be the standard spiking solution If there is doubt about whether the amount of silica gel is adequate, the amount needed should be determined by test.
Obtain the net absorbance for the peak that occurs near cm-1 3. If the spike plus the background concentration exceeds the calibration range, perform an appropriate dilution so that the reading is within the calibration range.
Be sure to record the concentration of oil and grease and non-polar material added. Ideally, a linear calibration curve will be obtained from these standards.
The optimum technique depends upon the sample, but may include stirring,? The data presented here is for reference or information only and may be useful if another interlaboratory method validation study is performed.
Rinse the tip of the separatory funnel, Na2SO4,? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Take care to avoid insertion of the cell stopper so tightly that the cell could burst from expansion of its contents as it resides in the light beam.
Astj the extract is milky, remove the Na2SO4 cake Section One laboratory disposed of its samples before performing the non-polar analysis. Subtract the volume of acid added to the sample, as recorded in 9. Summary of Test Method 4. Fill bottle with minimal headspace to prevent loss of volatile constituants. Powdered sodium d766 should not be used because water may cause it to solidify. D — 04 any sample preservation and pretreatment steps.
This test method contains procedures that can assist the analyst in breaking such emulsions. However, this amount may be insufficient for some samples.