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):||2 October 2013|
|PDF File Size:||16.86 Mb|
|ePub File Size:||19.41 Mb|
|Price:||Free* [*Free Regsitration Required]|
The optimum technique depends upon the sample, but may include stirring,? However, place the reference cell in the reference beam during all scans.
ASTM D – standard test method by Infrared Determination
The LCS can be the standard spiking solution The amount of acid required will be dependent upon the pH and buffer capacity of the sample at the time of collection. If the percent recovery is not within these limits, a matrix interference may be present in the sample selected for spiking. A number in parentheses indicates the year of last reapproval. However, all traces of methylene chloride or other solvent must be removed so that they do not compromise the measurement.
Cap with the original cap and shake the sample bottle to rinse all interior surfaces. To assure the most accurate concentrations, use the smallest serological pipet or syringe for measurements.
Transfer volumes have been rounded for ease of measurement and calculation. Calculate the calibration factor CFx in each of the? If the concentration of awtm 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.
Prerinse the sample bottle and cap with the solvent prior to sample collection. Introduction of pH paper to an actual sample or sample cap may remove some oil from the sample. If linearity cannot be aatm past a certain concentration, consider that concentration the upper bounds of the calibration and adjust the calibration standards accordingly.
If the concentration of non-polar material exceeds the calibration range, dilute the extract to bring the concentration within the calibration range. Be sure to record the concentration added to the LCS. Subtract the volume of acid added to the sample, as recorded in 9. Rewet sodium sulfate with solvent before use.
If a composite measurement is required, individual grab samples collected at prescribed time intervals may be analyzed separately and the concentrations averaged. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine D Guide for Good Laboratory Practices2 the applicability of regulatory limitations prior to use.
Rinse the tip of the separatory funnel, Na2SO4,? Alternatively, solid-phase extraction SPEcontinuous liquid-liquid extraction, or other extraction techniques may be used to prevent emulsion formation.
In the procedure below, the IR instrument is calibrated from 0. The data presented here is for reference or information only and may be useful if another interlaboratory method validation study is performed.
L for solution density of 0. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Mix equal volumes of concentrated HCl and water 8. Several labs reported problems calibrating or detecting low levels of oil and grease using AK D — 04 any sample preservation and pretreatment steps. The extract is diluted to 50mL and a portion is examined by infrared spectroscopy IR for an oil and aatm measurement.
Similarly, this test method de? One laboratory disposed of its samples before performing the non-polar analysis. Alternatively, samples can be collected in the?