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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Do not rinse the sample bottle with the sample to be analyzed. Cap the bottle and shake well. Ideally, the calibration curve obtained will be linear refer to Section The matrix and chemistry of the solution should be equivalent to the solution used in the collaborative study. If the result is not within these limits, analysis of samples is halted until the problem is asfm, and either all samples in the batch must be reanalyzed, or the results must be quali?
The nonpolar material is measured by infrared spectroscopy. Collect an additional 1 or 2 sample aliquots for the matrix spike and matrix spike duplicate Section Remove the solid with a clean spatula, and add about 1 g dd7066 fresh sodium sulfate to the? Either the average calibration factor CFm or the calibration curve is used, not both.
Alternatively, the actual sample density can be determined by weighing mL of the sample water in a tared mL? Do not attempt to proceed since accurate, quantitative results for the test are not obtainable.
Cool cell to room temperature before use.
ASTM D – standard test method by Infrared Determination
If the concentration of non-polar material exceeds the calibration range, dilute the extract to bring the concentration within the calibration range. If the aastm sulfate cakes when contacted with the extract,?
Spike an aliquot of the sample with a known 6 Where: The extract is diluted to 50mL and a portion is examined by infrared spectroscopy IR for an oil and grease measurement. NOTE 4—For infrared instruments having computer capability, data may be obtained automatically or as described in L of octanoic acid by the water volume in liters. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
If the spike plus the background concentration exceeds the calibration range, perform an appropriate dilution so that the reading is within the calibration range. Use the entire sample because removing a portion would not apportion the oil and grease that adheres to the bottle surfaces.
FT-IR Environmental Hydrocarbons ASTM D7066 Analysis Pack
To reduce the solvent expense, it may be prudent to use methylene chloride or a solvent other than the solvent used for extraction. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. For single-beam and infrared?
However, place the reference cell in the reference beam during all scans. If a composite measurement is required, individual grab samples collected at prescribed time intervals may be analyzed separately and the concentrations averaged.
Therefore, samples must be collected as grab samples.
Summary of Test Method 4. If the percent recovery is not within these limits, a matrix interference may be awtm in the sample selected for spiking.
The volume should always be greater than 1? Powdered sodium sulfate should not be used because water may cause it to solidify.
Rinse with a small portion of solvent and discard the rinsate. If the extract is milky, remove the Na2SO4 cake Section If the concentration of oil and grease exceeds the calibration range, dilute extract to bring sample within calibration range.
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.
Subtract the d7066 of acid added to the sample, as recorded in 9. Other labs used AK with no issues, indicating the use of AK is dependent on the type and model of IR instrument used.