Metrohm’s CIC does it: ASTM D Standard Test Method for Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons and Their. Significance and use according to ASTM D – 14a. ASTM D – Standard Test Method for Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons and Their Mixtures by Oxidative Pyrohydrolytic.
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Calibration standards can have a useful life of about 6 to 12 months if properly stored in a cool, dark place.
This standard is also available to be included in Standards Subscriptions. Subscription pricing is determined by: The calibration curve asfm be at least 0. In contact with the skin it produces burns that may be quite serious unless promptly treated. The net result of larger sample sizes is an asmt in sensitivity and precision of the analysis while lowering the absolute detection limit of the CIC system. The combined system of pyrohydrolytic combustion followed by 3 Available from U.
However, it is the responsibility of the analyst to verify the solubility of the sample in the solvent and that the diluted sample results conform to the precision and astmm of the method. A typical diagram of a CIC system is shown in Fig. This test method can be used to determine total sulfur and halogens in aromatic hydrocarbons and their mixtures.
NOTE 8—An automatic sampling and injection device or autosampler can be used in place of the described manual injection procedure as long as the accuracy and performance of the method is not degraded. The system is swept by a humidi? Download your relevant applications. Mr Mrs Ms Dr Prof.
Thermoelectric coolers peltier or recirculating refrigerated liquid devices are dd7359 recommended.
Use materials that are rated for containing these hydrocarbons in all sample containers and sample transfer apparatus. Alternatively, using a solvent with non-detectable contamination relative to the sample makes the blank correction unnecessary. The gaseous by-products of the combusted sample are trapped in an absorption medium where the hydrogen halides HX formed during combustion disassociate into their respective ions, Xwhile the sulfur oxides SOX formed are further oxidized to SO in the presence of an oxidizing agent.
After any cleaning or adjustment, assemble and leak check the apparatus. The Gas Adsorption Unit is interfaced to the Ion Chromatograph and injects an aliquot of the adsorption solution into the Ion Chromatograph after the sample is combusted and the by-products of combustion are absorbed.
The concentrations in the test specimen must be less than the concentration of the highest standard and greater than the lowest standard used in the calibration. After each standard concentration has been combusted, an aliquot of absorbing solution is introduced into the IC for separation and quanti? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
NOTE 10—The level of boat cooling required is directly related to the volatility of the sample analyzed.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Your Alert Profile lists the documents that will be monitored. L of sample into the sample boat.
ASTM D – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
This test method can be used to determine total sulfur and halogens in aromatic hydrocarbons and their mixtures. The results can be used for compliance determinations when acceptable to a regulatory authority using performance based criteria.
The inlet end shall allow for the stepwise introduction and advancement of a sample boat into the heated zone and shall have a side arm for the introduction of the humidi? Would you like to subscribe to one or more of our regular scientific publications?
The autosampler may be used as long as the accuracy and performance of the method is not degraded. If the document is revised or amended, you will be notified by email. Switching sample boats between each analysis may prove effective, provided sample size is not too large. The concentration of phosphate in the absorbing solutions is used as an internal standard by the Adtm Chromatograph.
An aliquot of known volume of the adsorbing solution is then automatically injected into an ion chromatograph IC by means of a sample injection valve. Need more than one copy? It is the responsibility aetm the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Link to Active This link will always route to the current Active d77359 of the standard. This standard is not included in any packages.
Metrohm: ASTM D7359 – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
The sample may also be weighed directly into a sample boat and placed into the boat drive system. If bubbles are present in the liquid column,? Target Standard Compound s 7. You may delete a document from your Alert Profile at any time. Multiple sequential injections shall be completed until a stable background is attained. This test method can be used to determine total sulfur and halogens aromatic hydrocarbon matrices, in?
This procedure can provide greater precision than the volume delivery method, provided a balance with a precision of Other suitable materials, weights and volumes may be substituted in preparing stock calibration standards as long as the performance of the method is not degraded.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.