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.
|Published (Last):||19 December 2013|
|PDF File Size:||3.10 Mb|
|ePub File Size:||7.61 Mb|
|Price:||Free* [*Free Regsitration Required]|
Precision and Bias If the percent recovery is not within these limits, a matrix interference may be present in the sample selected for spiking. NOTE 5—Use of the sodium sulfate is necessary to prevent water from interfering in the determination.
Transfer volumes have been rounded for d7066-40 of measurement and calculation. Due to the cost of performing the analysis, each matrix tested contained only sstm set of Youden pair concentrations.
Be sure to record the concentration added to each replicate. Keep a record of each dilution for use in Cap with the original cap and shake the sample bottle to rinse all interior surfaces. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
L of octanoic acid by the water volume in liters. If the concentration of non-polar material exceeds the calibration range, dilute the extract to bring the concentration within the calibration range. If the IR instrument cannot be calibrated to 0. Alternatively, samples can be collected in the? 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.
Alternatively, the actual sample density can be determined by weighing mL of the sample water in a tared mL? Current edition approved June 1, If the amount of acid required is not known, make the pH measurement on a separate sample that will not be analyzed.
Remove the solid with a clean spatula, and add about 1 g of fresh sodium sulfate to the?
The same cell or matched cells should be used throughout the calibration. The extract is diluted to 50mL and a portion is examined by infrared spectroscopy IR for an oil and grease measurement.
ASTM D – standard test method by Infrared Determination
Obtain net values for single-beam and infrared? Rinse the tip of the separatory funnel, Na2SO4,? Do not exceed 50 mL of total solvent during the extraction and rinse procedure. A number in parentheses indicates the year of last reapproval. B Values obtained for Site 3 samples from one lab were extraordinarily high – over twice the known concentration – in contrast to those from other labs, which generally were lower than the true concentration.
Introduction of pH d7606-04 to an actual sample or sample cap may remove some oil from the sample. NOTE 6—Certain types of samples, such as those containing a large amount of detergent, may form an emulsion during the extraction. Rewet sodium sulfate with solvent before use.
To assure the most accurate concentrations, use the smallest serological pipet or syringe for measurements. Pour the solvent into the separatory funnel, rinsing down the sides of the transfer funnel. For double-beam operation, either block asttm 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. Also, in relation to infrared?
Ideally, the calibration curve obtained will be linear refer to Section If the concentration of the analyte is less than?
Similarly, this test method de? Rinse with a small portion of solvent and discard the rinsate.
A nearly horizontal, straight line should be obtained. If the extract is milky, remove the Na2SO4 cake Section Fill bottle with minimal headspace to prevent loss of volatile aztm. D — 04 any sample preservation and pretreatment steps. If emulsion forms between the phases and the emulsion is greater than one-third the volume of the solvent layer, the laboratory should employ emulsion-breaking techniques to complete the phase separation.