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Method for detecting passivant in transformer oil by high efficiency liquid chromatography

A technology of high-performance liquid chromatography and detection method, which is applied in the field of high-performance liquid chromatography detection of passivating agents in transformer oil, and can solve the problems of not establishing insulating oil and not knowing the change situation, etc.

Inactive Publication Date: 2012-02-01
EAST CHINA ELECTRIC POWER TEST & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many companies have added a kind of Irgamet 39 to transformer oil TM passivating agent, but the change of the added passivating agent in the oil has not yet been grasped, because there is no establishment of irgamet 39 in insulating oil at home and abroad TM Detection method of passivating agent content

Method used

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  • Method for detecting passivant in transformer oil by high efficiency liquid chromatography
  • Method for detecting passivant in transformer oil by high efficiency liquid chromatography

Examples

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Embodiment 1

[0012] Use waters high-performance liquid chromatography to detect the Irgamet39-containing TM Transformer oil samples with passivating agent concentrations of 10, 50, 100, 150, and 200 mg / L were tested, and Symmetry C was selected 8 Chromatographic column, the length of the chromatographic column is 250mm, the column diameter is 4.6mm, the filler is silicon, the particle diameter is 5um, and the pore diameter is The injection volume was 10 μl, the flow rate was 1 ml / min, the column temperature was 35° C., the mobile phase was aqueous methanol (the volume ratio of methanol to water was 70:30), and the detector was Waters CapLC 2487 UV-visible dual-wavelength detector. Test results such as figure 1 As shown, there is a passivating agent (Irgamet 39) detection peak at 4.05min. For a typical chromatogram see figure 1 . Using the standard curve external standard method ( figure 2 ) for quantitative detection. By applying this method, the passivator Irgamet39 in transformer...

Embodiment 2

[0014] Use waters high performance liquid chromatography to contain Irgamet39 TM The transformer oil of the passivating agent is tested, and the Symmetry C18 chromatographic column is selected. The length of the chromatographic column is 150mm, the column diameter is 4.6mm, the filler is silicon, the particle size is 5um, and the pore size is The injection volume was 20 μl, the flow rate was 1 ml / min, the column temperature was 30° C., the mobile phase was aqueous methanol (the volume ratio of methanol and water was 60:40), and the detector was Waters CapLC2487 UV-visible dual-wavelength detector.

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Abstract

The invention provides a method for detecting a passivant in transformer oil by a high efficiency liquid chromatography. In the method, a high efficiency liquid chromatograph is adopted to detect and a chromatographic column with the length of 150 to 250mm and the column diameter of 4.6mm is selected, wherein silicon is used as a filler; a particle size is 5 micrometers; an aperture is 100 angstroms; a sample size is in the range of 10 to 20 microliters; a flow rate is 1 milliliter per minute; a column temperature is in the range of 30 to 35 DEG C; aqueous solution of methanol is used as a flowing phase; and an ultraviolet absorption detector is used as a detector. Due to the adoption of the method, the content of the passivant in the transformer oil can be detected, the sulfur attack of the transformer oil is evaluated, and the concentration level of the passivant in the oil is monitored and regulated.

Description

technical field [0001] The invention relates to a high performance liquid chromatography detection method for passivating agents in transformer oil. Background technique [0002] In recent years, transformers and reactors in many countries have experienced faults related to corrosive sulfur in transformer oil. Corrosive sulfur in transformer oil reacts with copper conductors to form cuprous sulfide deposits, which are the cause of these types of failures. Adding a passivator to the oil is a method to prevent the risk of cuprous sulfide deposition, which can effectively form a protective film on the surface of the bare metal wire, reduce the chemical reaction between copper ions and sulfur, and prevent the sulfur corrosion of transformer oil, thereby eliminating the Insulation accidents induced by this. At present, many companies have added a kind of Irgamet 39 to transformer oil TM passivating agent, but the change of the added passivating agent in the oil has not yet bee...

Claims

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Application Information

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IPC IPC(8): G01N30/60G01N30/36
Inventor 朱向群龚秋霖厉敏宪彭伟
Owner EAST CHINA ELECTRIC POWER TEST & RES INST
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