ASTM D7359 PDF

ASTM D7359 PDF

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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ASTM D — 14a: The use of a thermoelectrically cooled sample introduction area may be required to prevent premature volatilization of the sample before entering the combustion area. Mr Mrs Ms Dr Prof. D — 08 Standard Test Method for This standard is issued under the? This is a temporary precision statement and reproducibility will be determined within? In CIC the samples are first digested under an argon atmosphere in the oven unit and then burnt with oxygen.

This procedure can provide greater precision than the volume delivery method, provided a balance with a precision of The results can be used for compliance determinations when acceptable to a regulatory authority using performance based criteria. 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.

NOTE 3—Other calibration standard sources and diluents may be used if precision and accuracy are not degraded. 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 accuracy of the method. The total fluorine, chlorine and sulfur contained in aromatic hydrocarbon matrices can contribute to emissions, be harmful to many catalytic chemical processes, and lead to corrosion.

Download your relevant applications. S with a linearity correlation coefficient of 0.

ASTM D7359-08 Standard Test by Combustion Ion Chromatography-CIC

No other units of measurement are included in this standard. If required a dilution or concentration of the sample can be performed on the sample.

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The concentration of phosphate in the absorbing solutions is used as an internal standard by the Ion Chromatograph. NOTE 12—Samples larger than 80?

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. L or mg of sample.

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 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.

Post Analysis Steps NOTE 5—A correction for chemical impurity can be used if deemed necessary. Thermoelectric coolers peltier or recirculating refrigerated liquid devices are strongly recommended.

Metrohm: ASTM D7359 – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Active version of the standard. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Use materials that are rated for containing these hydrocarbons in all sample containers and sample transfer apparatus. L of standard or sample.

awtm 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. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. NOTE 6—It is recommended to calibrate the instrument with a minimum of three different concentration standards. L of sample into the sample boat.

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Multiple sequential injections shall be completed until a stable background is attained. Individual reprints single or multiple copies s7359 this standard may be obtained astmm contacting ASTM at the above address or at phonefaxor service astm.

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.

Dilute to volume with the selected solvent described in 7.

ASTM D – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons

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?

Exercise extra care when using? 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. Combustion IC Combustion IC combines pyrohydrolytic sample combustion and absorption of the evolving combustion gases in an oxidizing aqueous solution that is then fed into an ion chromatograph for analysis of halides and sulfur as sulfate. There the sample is combusted in an oxygen rich pyrohydrolytic environment.

Current edition approved Oct. The sample may also be weighed directly into a sample boat and placed into the awtm drive system.

Need more than one copy? If the document is revised or amended, you will be notified by email. After each standard concentration has been combusted, an aliquot of absorbing solution is introduced into the IC for separation and quanti?

ASTM D – Other systems may be used as long as precision is shown to be as good as or d7539 than the precision in the method.