Reference Gas Mixtures of Formaldehyde in Nitrogen: Preparation by a Dynamic Gravimetric Method

Konopelko, L. A.; Efremova, O V; Kadis, Rouvim; Klimov, A Y; Колобова, А. В.; Malginov, A. V.; Chubchenko, Ian

doi:10.1007/s11018-020-01713-3

Cited by 1 publication

(2 citation statements)

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“…For instance, in a single in in 2013, a broken seal resulted in the emission of 113 kg of SF6 [17]. Such gas leakag dents could be prevented through using an alarm or other gas leakage detection sy All the instruments for SF6 measurements are typically calibrated against ce reference materials (CRMs) [18][19][20][21][22][23]. The concentrations of commercially available S erence materials usually have a broad range from 1 µmol/mol to 6000 µmol/mol.…”

Section: Determination Of Sf 6 Using Gc-fpdunclassified

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Characteristic Evaluation of Gas Chromatography with Different Detectors for Accurate Determination of Sulfur Hexafluoride

Pan,

Zhang,

Zhang

et al. 2024

Molecules

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Sulfur hexafluoride (SF6), which survives in the atmosphere for an extremely long period of time, is the most potent greenhouse gas regulated under the Kyoto Protocol. So, the accurate monitoring of atmospheric SF6 plays an important role in the study of the control policies for reducing greenhouse gas emissions. The instruments for SF6 measurement are typically calibrated using certified reference materials. The concentrations of the commercially available SF6 reference materials usually have a broad range, from 1 μmol/mol to 6000 μmol/mol. Some characteristics including sensitivity, linear range, relative standard deviation, and accuracy are crucial for the determination of SF6 in such a broad concentration range. Therefore, the selection of a proper detector for the accurate determination of SF6 with such a broad range is extremely important to establish a gas chromatography (GC) method for developing SF6 reference materials. In this paper, several typical GC methods with different detectors, including a thermal conductivity detector (TCD), a pulsed discharge helium ionization detector (PDHID), and a flame photometric detector (FPD), were carefully established for the accurate determination of SF6 with different concentrations. The results show that an FPD detector has a relatively narrow linearity range, thus a quadratic equation should be established for building a calibration curve. The PDHID and TCD have good linearity with coefficients of 1.0000 in the concentration range of 10–100 μmol/mol (using a PDHID), and 100–1000 μmol/mol (using a TCD), respectively. Further considering the measurement errors of indication results, the PDHID is suitable for SF6 measurement when the concentrations are below 100 μmol/mol, whereas the TCD is suitable for SF6 measurement when the concentrations are over 100 μmol/mol. These results provide useful guidance in choosing an appropriate GC detector for the accurate determination of SF6, which are especially very helpful for developing SF6 reference materials.

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Section: Determination Of Sf 6 Using Gc-fpdunclassified

“…All the instruments for SF 6 measurements are typically calibrated against certified reference materials (CRMs) [ 18 , 19 , 20 , 21 , 22 , 23 ]. The concentrations of commercially available SF 6 reference materials usually have a broad range from 1 μmol/mol to 6000 μmol/mol.…”

Section: Introductionmentioning

confidence: 99%