ASTM D – Free download as PDF File .pdf), Text File .txt) or read online for free. Designation: D – An American National Standard. Standard. ASTM D_能源/化工_工程科技_专业资料。Designation: D – 04 An American National Standard Standard Test Method for. Buy ASTM D() Standard Test Method for dimer/trimer of chlorotrifluoroethylene (S) Recoverable Oil and Grease and Nonpolar Material by.
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As discussed in Section 11, the concentrations of these standards can be adjusted to stay within the linear range of the IR instrument. If such an emulsion cannot be broken by any attempted means, the test method is not applicable to the problem sample.
Scan as in Alternatively, samples can be collected in the? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Cap with the original cap and shake the sample bottle to rinse all interior surfaces.
ASTM D – standard test method by Infrared Determination
If the result is not within these limits, analysis of samples is halted until the problem is corrected, and either all samples in the batch must be reanalyzed, or the results must be quali? Transfer volumes have been rounded for ease of measurement and calculation. Precision and Bias C One laboratory reported a result of for oil and grease, nearly 3 times the mean recovery among the other laboratories, and a value of zero for non-polar material, which are highly suspect results.
Rinse with a small portion of solvent and discard the rinsate. 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.
Included in this estimation of oil and grease are any other compounds soluble in the solvent. For single-beam and infrared? If not, check cells for cleanliness, matching, etc.
In a few cases, the composition of the oil and grease in a sample will be known. Keep a record of each dilution for determination of the concentration in the sample in A fresh spiking solution should be prepared weekly or bi-weekly. If the concentration of the analyte is less than? Subtract the volume of acid added to the sample, as recorded in 9. Calculate the calibration factor CFx in each of the?
Spike an aliquot of the sample with a known 6 Where: If there is doubt about whether the amount of silica gel is adequate, the amount needed should be asm by test. If a sample is encountered that exceeds the calibration range, dilute the sample extract to bring the concentration into the calibration range. L of isooctane by the water volume in liters.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? Due to the cost of performing the analysis, each matrix tested contained only one set of Youden pair concentrations.
Do not exceed 50 mL of total solvent during the extraction and rinse procedure. Vent the funnel slowly to prevent loss of sample. A nearly horizontal, straight line zstm be obtained.
Cool cell to room temperature before use. The replicates may be interspersed with samples. Pour the solvent into the separatory funnel, rinsing down the sides of the transfer funnel. A number in parentheses indicates the year of last reapproval. However, place the reference cell in the reference beam during all scans.
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. Several labs reported problems calibrating or detecting low levels of oil and grease using AK If linearity cannot be achieved past a certain concentration, consider that concentration the upper bounds of the calibration and adjust the calibration standards accordingly.
Rinse the tip of the separatory funnel, Na2SO4,? The LCS must be taken through all of the steps of the analytical method including sample preservation and pretreatment. Powdered sodium sulfate should not be used because water may cause it to solidify. The optimum technique depends upon the sample, but may include stirring,?
Do not rinse the sample bottle with the sample to be analyzed. In the procedure below, the IR instrument is calibrated asmt 0.
If the concentration of oil and grease exceeds the calibration range, dilute extract to bring sample within calibration range. To reduce the solvent expense, it may be prudent to use methylene chloride or a solvent other than the solvent used for extraction.
Your comments will receive careful consideration at a meeting of the responsible technical asrm, which you may attend. Calibration NOTE 3—The cell s used for calibration must be initially thoroughly cleaned with solvent and dried prior to beginning the calibration procedure.
If the sodium sulfate cakes when contacted with the extract,? Do not d7066-044 to proceed since accurate, quantitative results for the test are not obtainable. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
NOTE 4—For infrared instruments having computer capability, data may be obtained automatically or as described in