T/CES 017-2018 The determination of sulfur elements in insulating oil using inductively coupled plasma emission spectroscopy

Scope

Scope: This standard specifies the method for determining the sulfur content in insulating oil using an inductively coupled plasma emission spectrometer. This standard is applicable to the determination of sulfur content in insulating oil with a sulfur content of not less than 0.45 mg/kg and a kinematic viscosity at 40℃ of not more than 12 mm2/s. Main technical content: The inductively coupled plasma emission spectrometry method involves applying high-frequency energy provided by a high-frequency generator to a coupling coil outside the plasma torch tube, generating a high-frequency electromagnetic field in the torch tube, igniting it with a micro-spark, and ionizing the argon gas in the torch tube to conduct electricity. The conductive gas is subjected to a high-frequency electromagnetic field, forming a vortex zone concentric with the coupling coil. A strong high-frequency induction current generates high temperatures, resulting in a stable torch-like plasma flame at the torch tip. Liquid samples are introduced into the atomization system by a carrier gas (argon) for atomization and enter the central channel of the torch tube in the form of an aerosol. There, they are fully atomized, ionized, and excited in high temperatures and inert gases. Atoms of different elements emit characteristic spectra when excited or ionized, and the intensity of the characteristic spectra is proportional to the content of the element in the analyzed sample. The element types are detected qualitatively based on the wavelength of the characteristic spectral lines, and the content of the element is quantitatively determined based on the emission intensity of the characteristic spectrum of a particular element. This standard specifies the method for determining the sulfur content in insulating oil using an inductively coupled plasma emission spectrometer. This standard is applicable to the determination of sulfur content in insulating oil with a sulfur content of not less than 0.45 mg/kg

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