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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ASTM D – standard test method by Infrared Determination
NOTE 6—Certain types of samples, such as those containing a large amount of detergent, may form an emulsion during the extraction. Alternatively, samples can be collected in the? Keep a atsm of each dilution for determination of the concentration in the sample in asym The spiking solution may be used as an IRM. Obtain the net absorbance for the peak that occurs near cm-1 3. Calibration NOTE 3—The cell s used for calibration must be initially thoroughly cleaned with solvent and dried prior to beginning the calibration procedure.
The value obtained must fall within the control limits speci? Therefore, samples must be collected as grab samples. In the procedure below, the IR instrument is calibrated from 0. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? In a few cases, the dd7066-04 of the oil and grease in a sample will be known. Ideally, a linear calibration curve will be obtained from these standards. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxasm service astm.
The nonpolar material is measured by infrared spectroscopy. The same cell or matched cells should be used throughout the calibration.
The test blank must be taken through all of the steps of the analytical method including sample preservation and pretreatment. It is desirable to? A nearly horizontal, straight line should be obtained. Prerinse the sample bottle and cap with the solvent prior to sample collection.
Cap the bottle and shake well. Current edition approved June 1, Either the average calibration factor CFm or the calibration curve is used, not both. Summary of Test Method 4. 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?
If the percent recovery is not within these limits, a matrix interference may be present in the sample selected for spiking. 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.
Spiking solution section Of those measured, certain ones may be adsorbed by silica gel while others may not.
Several labs reported problems calibrating or detecting low levels of oil and grease using AK C One laboratory reported a result asmt 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.
To more accurately calculate the? Calculate the percent recovery of the LCS using the following equation: The data presented here is for reference or information only and may be useful aetm another interlaboratory method validation study is performed. Do not rinse the sample bottle with the sample to be analyzed.
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Be sure to record the concentration added to each replicate. A fresh spiking solution should be prepared weekly or bi-weekly.