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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Rewet sodium sulfate with solvent before use. If the extract is milky, remove the Na2SO4 cake Section If the sodium sulfate cakes when contacted with the extract,? For example, collect four individual mL samples over the course of a day.
The LCS can be the standard spiking solution Of those measured, certain ones may be adsorbed by silica gel while others may not. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
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. Keep a record of each dilution for use in To more accurately calculate the? NOTE 8—The amount of silica gel needed has been estimated at 3 g for every mg of polar material. Powdered sodium sulfate should not be used because water may cause it to solidify.
In accordance with Section 1.
Collect an additional 1 or 2 sample aliquots for the matrix spike and matrix spike duplicate Section Ideally, a linear calibration curve will be d70666-04 from these standards. Obtain net values for single-beam and infrared? Unless otherwise indicated, it is intended that all reagents shall conform to the speci?
However, in order to obtain consistent results between sample sets and between laboratories with different wastewater matrices, calibration with the known oil and grease in a sample should not be used in this method. A number in parentheses indicates the year of last reapproval.
Do not attempt to proceed since accurate, quantitative results for the test are not obtainable. To assure the most accurate concentrations, use the smallest serological pipet or syringe for measurements.
If the sample is to be shipped by commercial carrier, U. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? This test method contains procedures that can assist the analyst in breaking such emulsions.
ASTM D – standard test method by Infrared Determination
If the spike plus the background concentration exceeds the calibration range, r7066-04 an appropriate dilution so that the reading is within the calibration range. Be sure to record the concentration added to each replicate. 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,? The nonpolar material is measured by infrared spectroscopy. If emulsion forms between the phases and the emulsion is greater than one-third the volume of astj solvent layer, the laboratory should employ emulsion-breaking techniques to complete the phase separation.
L of octanoic acid by the water volume in liters. However, this amount may be insufficient for some samples.
If calibration is not veri? The LCS must be taken through all of the steps of the analytical method including sample preservation and pretreatment. The test blank must be taken through all of the steps of the analytical method including sample preservation and atsm. L of isooctane by the water volume in liters. Calibration NOTE 3—The cell s used for calibration must be initially thoroughly cleaned with solvent and dried prior to beginning the calibration procedure.