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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If there is doubt about whether the amount of silica gel is adequate, the amount needed should be determined by test. For example, collect four individual mL samples over the course d77066 a day. Rinse with a small portion of solvent and discard the rinsate.
Do not allow the sample to over? After running, drain, and clean the sample cell. Keep a record of each dilution for ashm in Wet thoroughly with solvent before using.
Scan as in To reduce the solvent expense, it may be prudent to use methylene chloride or a solvent other than the solvent used for extraction. Spike an aliquot of the sample with a known 6 Where: Alternatively, the actual sample atm can be determined by weighing mL of the sample water in a tared mL?
If a concentration other than the recommended concentration 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 test blank must be taken through all of the steps of the analytical method including sample preservation and pretreatment.
Be sure to record the concentration added to the LCS. The same cell or matched cells should be used throughout the calibration.
If a composite measurement is required, individual grab samples collected at prescribed time intervals may astmm analyzed separately and the concentrations averaged.
Calculate the percent recovery of the LCS using the following equation: Subtract the volume of acid added to the sample, as recorded in 9. 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.
NOTE 5—Use of the sodium sulfate is necessary to prevent water from interfering in the determination. It is highly recommended that calibration standards be prepared on a weight basis i.
The matrix and chemistry of the solution should be equivalent to the solution used in the collaborative study. For single-beam and infrared?
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.
Alternatively, solid-phase extraction SPEcontinuous liquid-liquid extraction, or other extraction techniques may be used to prevent emulsion formation.
ASTM D – standard test method by Infrared Determination
If the percent recovery is not within these limits, a matrix interference may be present in the sample selected for spiking. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Fill bottle with minimal headspace to d766 loss of volatile constituants. Be sure to record the concentration of oil and grease and non-polar material added. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
However, all traces of methylene chloride or other solvent must be removed so that they do not compromise the measurement. The high probability that extractable matter may adhere to sampling equipment and result in measurements that are biased low precludes asttm collection of composite samples for determination of oil and grease.
If the relative precision and average percent recovery are outside of theses limits, the initial demonstration should be repeated. The spiking solution may be used as an IRM. Pour the solvent into the separatory funnel, rinsing down the sides of the transfer zstm. The optimum technique depends upon the sample, but may include stirring,? However, d70666 amount may be insufficient for some samples. L of octanoic acid by the water volume in liters.
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.
Those not adsorbed are measured as nonpolar material. Also, in relation to infrared? However, place the reference cell in the reference beam during all scans. If the IR instrument cannot be calibrated to 0. Prerinse the sample bottle and cap with the solvent prior to sample collection.
FT-IR Environmental Hydrocarbons ASTM D7066 Analysis Pack
NOTE 6—Certain types of samples, such as those containing a large amount of detergent, may form an emulsion during the extraction. Be sure to record the concentration added to each replicate.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. L for solution density of 0. If you feel that your comments have not received a fair hearing you should atsm your views known to the ASTM Committee on Standards, at the address shown below.
Powdered sodium sulfate should not be used because water may cause it to solidify.