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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Summary of Test Method 3. These materials rapidly attack wool and leather.
A number in parentheses ast the year of last reapproval. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Please first verify your email before subscribing to alerts. NOTE 3—Other calibration standard sources and diluents may be used if precision and accuracy are not degraded. This procedure can provide greater precision than the volume delivery method, provided a balance with a precision of Exercise extra care when using? Decrease the boat drive introduction rate or hold times in the furnace, or both, if coke or soot is observed on the exit end of the combustion tube.
These features may be used as long as they do not degrade the performance and accuracy of the method. This test method can be used to determine total sulfur and halogens aromatic hydrocarbon matrices, in? It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices astn determine the applicability of regulatory limitations prior to use. The concentration of phosphate in the absorbing solutions is used as an internal standard by the Ion Chromatograph.
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. The pyrohydrolytic combustion tube must be of ample volume, and have a heated zone with quartz wool or other suitable medium providing sufficient surface area so that the complete pyrohydrolytic combustion of the sample is ensured.
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. Download your relevant applications. Work Item s – proposed revisions of s7359 standard. This test method can be used to determine total sulfur and halogens in aromatic hydrocarbons and their mixtures.
Standards Subsctiption may be the perfect solution. L of standard or sample. Proceed to Checkout Continue Shopping. Other numbers of concentration of calibration standards can be used as long as the accuracy and precision of the astk is not degraded. Manage your subscriptions Newsletters.
ASTM D – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
The use of a thermoelectrically cooled sample introduction area may be required to prevent premature volatilization of the sample before entering d7395 combustion area. If bubbles are present in the liquid column,?
In CIC the samples are first digested under an argon atmosphere in the oven unit and then burnt with oxygen. Calibration standards can have a useful life of about 6 to 12 months axtm properly stored in a cool, dark place.
The halide and sulfate anions are separated into individual elution bands on the separator column of the IC. NOTE 10—The level of boat cooling required is directly related to the volatility adtm the sample analyzed.
Calibration and Standardization Use materials that are rated for containing these hydrocarbons in all sample containers and sample transfer apparatus. Metrohm Australia – Metrohm New Zealand. Delivery of hydronium ions for suppression by electrolysis of dd7359 eluent through a cation exchange membrane.
If required a dilution or concentration of the sample can be performed on the sample. Correction for contaminate levels of elements of interest must be corrected for solvent blank. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? 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.
The instrument must be clean and properly maintained to address potential sources of contamination, or carryover, or both. The difference between the two volume readings is the volume of sample injected. The results can be used for compliance determinations when acceptable to a regulatory authority using performance based criteria.
Metrohm: ASTM D7359 – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
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 combined system of pyrohydrolytic combustion followed by 3 Available from U. In the Absorber Module, the resulting gaseous compounds are passed into an absorption solution, which is then transferred inline to a Metrohm ion chromatography system, where it is analysed.
L or mg of sample. As the voice of the U. 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? 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.
No other units of measurement are included wstm this standard. 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.
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