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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If a concentration other than the recommended awtm is used, refer to Practice D for information on applying the F test and t test in evaluating the acceptability of the mean and standard deviation. The replicates may be interspersed with samples. Freezing the sample may break the bottle. Alternatively, solid-phase extraction SPEcontinuous liquid-liquid extraction, or other extraction techniques may be used to prevent emulsion formation. However, place 7d066-04 reference cell in the reference beam during all scans.
Do not exceed 50 mL of total solvent during the extraction and qstm procedure. A nearly horizontal, straight line should be obtained. Rewet sodium sulfate with solvent before use.
The volume should always be greater than 1? 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
Either the average calibration factor CFm or the calibration curve is used, not both. Wet thoroughly with solvent before using. If the concentration of oil and grease exceeds the calibration range, dilute extract to bring sample within calibration range.
Alternatively, samples can be collected in the? If the relative precision and average percent recovery are outside of theses limits, the initial demonstration should be repeated.
The optimum technique depends upon the sample, but may include stirring,?
Fill bottle with minimal headspace to prevent loss of volatile constituants. D — 04 any sample preservation and pretreatment steps. Summary of Test Method 4. If the amount of acid required is not known, make the pH measurement on a separate sample that will not be analyzed.
Mix equal volumes of concentrated HCl and water 8. Subtract the volume of acid added to the sample, as recorded in 9. The test blank must be taken through all of the steps of the analytical method including sample preservation and pretreatment. Under these circumstances, one of the following remedies must be employed: Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Alternatively, the actual sample density can be determined by weighing mL of the sample water in a tared mL? Spike an aliquot of the sample with a known 6 Where: The value obtained must fall within the control limits speci? However, this amount may be insufficient for some samples.
Drain and clean the sample cell. L of octanoic acid by the water volume in liters. D066-04 edition approved June 1, One laboratory disposed of its samples before performing the non-polar analysis. The spike must produce a concentration in the spiked sample that is 2 – 5 times the background concentration or 10 times the detection limit of the test method, whichever is greater.
This test method contains procedures that can assist the analyst in aztm such emulsions.
Also, in relation to infrared? NOTE 6—Certain types of samples, such as those containing a large amount of detergent, may form an emulsion during the extraction. The matrix and chemistry of the solution should be equivalent to the solution used in the collaborative study. Precision and Bias It is highly recommended that calibration standards be prepared on a weight basis i.
If the sample is to be shipped by commercial carrier, U. C One laboratory reported v7066-04 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.
The high probability that extractable matter may adhere to sampling equipment and result in measurements that are biased low precludes the collection of composite samples for determination of oil and grease. It is desirable to?
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. 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.
If such an emulsion cannot be broken by any attempted means, the test method is not applicable to the problem sample.
NOTE 5—Use of the sodium sulfate is necessary to prevent water from interfering ashm the determination. Ideally, a linear calibration curve will be obtained from these standards.
However, all traces of methylene chloride or other solvent must be removed so that they do not compromise the measurement. If calibration is not veri?