ASTM D – Free download as PDF File .pdf), Text File .txt) or read online for free. New ASTM Method D With the manufacture of Freon banned by the Montreal Protocol in , the old ASTM method (D ) that used infrared. The FT-IR Environmental Hydrocarbons ASTM D Application Pack contains all of the resources and components necessary to perform efficient analysis of.
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Spike an aliquot of the sample with a known 6 Where: If a composite measurement is required, individual grab samples collected at prescribed time intervals may be analyzed separately and the concentrations averaged.
FT-IR Environmental Hydrocarbons ASTM D7066 Analysis Pack
If the extract is milky, remove the Na2SO4 cake Section If calibration is not veri? Wet thoroughly with solvent before using. If such an emulsion cannot be x7066 by any attempted means, the test method is not applicable to the problem sample.
If the amount of acid required is not known, make the pH measurement on a separate sample awtm will not be analyzed. The matrix and chemistry of the solution should be equivalent to the solution used in the collaborative study. To assure the most accurate concentrations, use the smallest serological pipet or syringe for measurements.
Of those measured, certain ones may be adsorbed by silica gel while others may not. Either the average calibration factor CFm or the calibration curve is used, not both.
Several labs reported problems calibrating or detecting low levels of oil asstm grease using AK For example, collect four individual mL samples over the course of a day. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? Scan as in If the sample is to be shipped by commercial carrier, U. Rely upon recommendations of the manufacturer for single-beam and infrared?
Remove the solid with a clean spatula, and add about 1 g of fresh sodium sulfate to the? 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.
If the spike plus the background concentration exceeds the calibration range, perform an appropriate dilution so that the reading is within the calibration range. Ideally, a linear calibration curve will be obtained from these standards. NOTE 6—Certain types of samples, such as those containing a large amount of detergent, may form an emulsion during the extraction.
Drain and clean the sample cell. However, all data must be obtained consistently by one means or the other, not a combination of the two. A number in parentheses indicates the year of last reapproval. Cool cell to room temperature before use. Precision and Bias In accordance with Section 1.
It is highly recommended that calibration standards be prepared on a weight basis i. A nearly horizontal, straight line should be obtained.
If the IR instrument cannot be calibrated to 0. Those not adsorbed are measured as nonpolar material. This test method contains procedures that can assist the analyst in breaking such emulsions. One laboratory disposed of its samples before performing the non-polar analysis.
Prerinse the sample bottle and cap with the solvent prior to sample collection. Quality Control QC In order to be certain that analytical values obtained using this test method are valid and accurate within the con? After running, drain, and clean the sample cell. Powdered sodium sulfate should not be used because water may cause it to solidify. Calibration NOTE 3—The cell s used for calibration must be initially thoroughly cleaned with solvent r7066 dried prior to beginning the calibration procedure.
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Pour the solvent into the separatory funnel, rinsing down the sides of the transfer funnel. However, all traces of methylene chloride or other solvent must be removed so that they do not compromise the measurement.
ASTM D – standard test method by Infrared Determination
The extract is diluted to 50mL and a portion is examined by infrared spectroscopy IR for an oil and grease measurement. Current edition approved June 1, Alternatively, solid-phase extraction SPEcontinuous liquid-liquid extraction, or other extraction techniques may be used to prevent emulsion formation.
Included in this estimation of oil and grease are any other compounds soluble in the solvent. Spiking solution section Calculate the calibration factor CFx in each of the?
C One laboratory reported a 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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
However, place the reference cell in the reference beam during all scans. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Take care to avoid insertion of the cell stopper so tightly that the cell could burst from expansion of its contents as it resides in the light beam.