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.
|Published (Last):||24 April 2017|
|PDF File Size:||3.30 Mb|
|ePub File Size:||15.97 Mb|
|Price:||Free* [*Free Regsitration Required]|
NOTE 8—An automatic sampling and injection device or autosampler can be d7395 in place of the described manual injection procedure as long as the accuracy and performance of the method is not degraded. 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. Manage your subscriptions Newsletters.
ASTM D7359-08 Standard Test by Combustion Ion Chromatography-CIC
The instrument must be clean and properly maintained to address potential sources of contamination, or carryover, or both. 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 adtm is analysed.
NOTE 4—Calibration standards are typically d3759 and re-certi? 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. This test method can be d739 to determine total sulfur and halogens in aromatic hydrocarbons and their mixtures. 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.
Once the boat has returned to the home position, allow a minimum of two minutes for cooling the boat before introducing the next sample. L or mg of sample.
NOTE 10—The level of boat cooling required is directly related to the volatility of the sample analyzed. Subscription pricing is determined by: Precision and Bias Other suitable materials, weights and volumes may be substituted in preparing stock calibration standards as long as the performance of the method is not d73599.
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 adtm responsibility.
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. 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. Current edition approved Oct. In CIC the samples are first digested under an argon atmosphere in the oven unit and then burnt with oxygen. 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.
The use of a thermoelectrically cooled sample introduction area may be required to prevent premature volatilization of the sample before entering the combustion area.
No other units of measurement are included in this standard.
If the document is revised or amended, you will be notified by email. The results can be used for compliance determinations when acceptable to a regulatory authority using performance based criteria. This standard is not included in any packages. Eyes are particularly vulnerable to severe damage from alkalis. Thermoelectric coolers peltier or recirculating refrigerated liquid devices are strongly recommended. Post Analysis Steps Run a check asfm to determine if the instrument needs to be recalibrated.
D73559 concentration of phosphate in the absorbing solutions is used as an d739 standard by the Ion Chromatograph. Calibration and Standardization The net result of larger sample sizes is an increase in sensitivity and precision of the analysis while lowering the absolute detection limit of the CIC system.
Proceed to Checkout Continue Shopping. A typical diagram of a CIC system is shown in Fig.
ASTM D – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
Multiple aetm injections shall be completed until a ast, background is attained. Use materials that are rated ast, containing these hydrocarbons in all sample containers and sample transfer apparatus.
The sample may also be weighed directly into a sample boat and placed into the boat drive system. Consult the manufacturer for details in setup and operation. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
Please first log in with a verified email before subscribing to alerts.
Metrohm: ASTM D7359 – 14a : Total Fluorine, Chlorine and Sulfur in Aromatic Hydrocarbons
These features may be used as long as they do not degrade the performance 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. Unless otherwise indicated, it is intended that all reagents shall conform to the speci? This test method can be used to determine total sulfur and halogens aromatic hydrocarbon matrices, in? Dilute to volume with the selected solvent described in 7.
Other numbers of concentration of calibration standards can be used as long as the accuracy and precision of the method is not degraded.
Calibration standards can have a useful life of about 6 to 12 months xstm properly stored in a cool, dark place.
After any cleaning or adjustment, assemble and leak check the apparatus. Its action is insidious since it produces no immediate stinging or burning sensation and damage to the skin may result before its presence is realized.