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GB/T 7603-2012Determination of the aromatic carbon content in mineral insulating oil (English PDF)

矿物绝缘油中芳碳含量测定法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 29, 2012

Implementation date

November 1, 2012

Scope

GB/T 7603-2012 is the English-translated version of 矿物绝缘油中芳碳含量测定法.

GB/T 7603-2012 is the Chinese standard "Determination of the aromatic carbon content in mineral insulating oil". Its scope clause reads: This standard specifies the relative molecular mass range from 290 to 500 and the aromatic carbon content in mineral insulating oils aromatic carbon in the 2% to 35% range Content infrared spectrometry.

This standard applies to the determination of mineral insulating oil aromatic carbon content. Principle 2 According to the calculated spectra are absorbed aromatic ring absorbance at 1610cm-1 absorption peak of the infrared analysis of samples, the absorbance is an aromatic carbon content Function of the amount.

3 instruments and reagents 3.1 pairs beam infrared spectrophotometer or the Fourier transform infrared spectroscopy. 1610cm-1 band at a resolution higher than 3cm-1. Its clauses include test procedure.

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Document preview — GB/T 7603-2012

National Standard of the People's Republic of China

ICS: 75.100
Classification: E 38
Replacing: GB/T 7603-1987

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

1 Scope
3 1 instruments and reagents
5 Results Calculation

1 Scope

This standard specifies the relative molecular mass range from 290 to 500 and the aromatic carbon content in mineral insulating oils aromatic carbon in the 2% to 35% range

Content infrared spectrometry.

This standard applies to the determination of mineral insulating oil aromatic carbon content.

Principle 2

According to the calculated spectra are absorbed aromatic ring absorbance at 1610cm-1 absorption peak of the infrared analysis of samples, the absorbance is an aromatic carbon content

Function of the amount.

3 instruments and reagents 3.1 pairs beam infrared spectrophotometer or the Fourier transform infrared spectroscopy. 1610cm-1 band at a resolution higher than 3cm-1.

3.2 absorption cell

IR liquid cell variable or fixed path length, the path length between 0.1mm ~ 0.5mm, is accurate to 0.003mm.

Relationship between aromatic carbon content in the sample being measured and the path length in Table 1.

Table 1 Relationship between aromatic carbon content in the sample and the path length

Aromatic carbon content /% liquid absorption cell path length/mm

<=5 ~0.5

5 ~ 13 ~0.3

13 ~ 35 ~0.1

3.3 glass syringes

1mL or 2mL glass syringe.

3.4 Pipette

small suction ears ball.

3.5 Carbon tetrachloride

analytically.

4 Test Procedure

4.1

In accordance with the manufacturer's instructions, the instrument will adjust to working condition.

4.2 Determination of liquid cell path length

The standard assay using interference fringes, the adjustable or fixed path length of the empty sump on the optical path of the measuring device to scan, scan range

1900cm-1 ~ 600cm-1, as shown in the interference fringes obtained (if sump louver installation uneven contain maximum and minimum values of the rules shown in Figure 1

OK, not the interference fringes rules should open reinstalled.) According to the number of resulting interference fringes and the corresponding wave number, substituting public

Formula (1) was determined path length of the pool.

L = n2

gamma1-gamma

× 10 (1) […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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Editions of GB/T 7603

Edition	Title	Revision	Status
GB/T 7603-2012	Determination of the aromatic carbon content in mineral insulating oil	current edition	Current
GB/T 7603-1987	Determination of the aromatic carbon content in mineral insulating oil	previous edition	Superseded

This page sells the current edition, GB/T 7603-2012. Earlier editions are listed for reference only.

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