Why measure moisture in oil and what instruments are used

What method? Karl Fischer or distillation? If it is distilled, the added solvent reduces the viscosity of the test, which can avoid the impact and foaming caused by the boiling of the aqueous test oil; The solvent added during distillation is boiled and evaporated together with water, and the water contained in the test oil can be carried out, and the condensate flows into the receiver after condensation.

Since the density of water is greater than that of the solvent, the water can settle to the lower part of the receiver, and the solvent from the upper part of the receiver is returned to the distillation flask. As the distillation continues, the water is carried out by the solvent and settles to the lower part of the water acceptor. According to the amount of oil tested and the volume of water evaporated, the percentage of water content in the sample can be calculated as the result of the determination of the water content of petroleum products.

In the process of oil transportation and storage, the water entering the petroleum products such as the container is not dry and there is residual water, the oil storage container is not tightly sealed or the rain, snow and frost fall into the filling process, and the condensation of water vapor can make the petroleum products contain some water, in addition, the petroleum products have a certain degree of water absorption, which can absorb and dissolve a part of the water from the atmosphere or when it is in contact with water. There are three main states of existence of water entering petroleum products:

1. Suspension: The water is suspended in the oil in the form of water droplets. It mostly occurs in heavy oil with high viscosity, and second, emulsified:

It refers to the uniform dispersion of water in the oil in the form of very fine droplets, and the dissolved state: the water exists in a state of dissolution in the oil. The amount of it can be dissolved in oil depends on the chemical composition and temperature of the petroleum product.

In general, hydrocarbons, naphthenes and olefins have a weaker ability to dissolve water, while aromatic hydrocarbons can dissolve more water. The higher the temperature, the more water can be dissolved in the oil.

Why do you want to determine the moisture in the oil, take the transformer oil as an example, the transformer oil should be as free of water as possible, because the moisture has a great impact on the breakdown voltage of the transformer oil. The newly produced transformer oil generally does not contain water, the moisture of transformer oil mainly comes from the invasion of moisture in the air, its content is affected by the composition of hydrocarbons in the oil, aromatic hydrocarbons have the greatest solubility of water, and increase with the increase of temperature, so the ultra-high voltage transformer oil due to the high aromatic content, when it is injected into the transformer, it is necessary to use the vacuum system with the adsorbent to remove the water in depth. Therefore, you need Dexlite A1070 trace moisture analyzer.

Measure how much water is in it to ensure that our oil can still be used.

Summary. This may be a practical problem, and it is possible that the extraction solution does not meet the requirements, and the oil content of the original water sample is increased after extraction.

This may be a practical problem, and it is possible that the extraction solution does not meet the requirements, and the oil content of the original water sample is increased after extraction.

Don't know what extractant you're using? Generally, carbon tetrachloride is used as an extractant, and the purity is very high, otherwise the petroleum will be high. Generally, the infrared oil tester has a description of which manufacturer to buy the reagent to, so it is better to rent and negotiate with you to change the carbon tetrachloride reagent to try.

(1) Qualitative determination of moisture.

2) Moisture determination distillation.

3) Trace water coulometric method.

4) Trace moisture gas chromatography.

1.Moisture detector: Commonly used moisture detectors include halogen moisture meter, infrared moisture meter, electronic balance moisture meter, etc.

These instruments enable fast and accurate determination of the moisture content in a sample. 2.Oil Detector:

Commonly used oil detectors include infrared oil meter, nuclear magnetic resonance oil meter, ultraviolet-visible spectrum oil meter, etc. These instruments are able to quickly and accurately determine the oil content in a sample. It is necessary to select the appropriate instrument for testing according to the specific testing needs and sample characteristics.

Moisture detector: Commonly used moisture detectors include halogen moisture meter, infrared moisture meter, electronic nuclear balance change digging moisture meter, etc. These instruments enable fast and accurate determination of the moisture content in a sample.

2.Oil content detector: Commonly used oil content detectors include infrared oil content meter, nuclear magnetic resonance oil content meter, ultraviolet-visible spectrum dispersion high oil content meter, etc.

These instruments are able to quickly and accurately determine the oil content in a sample. It is necessary to select the appropriate instrument for testing according to the specific testing needs and sample characteristics. 

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Pro, the instrument for detecting moisture and oil content of raw materials can be called moisture meter and oil separation meter<> moisture meter is an instrument used to determine the moisture content of substances, <> commonly used are Karl Fischer titrator and <>

Drying oven method and other <>

Oil separation meter is an instrument used to determine the oil content in the substance, <> commonly used are centrifugal oil separation instrument, microwave digestion oil separation instrument<> there is also a kind of raw material detection water and oil content instrument called infrared moisture meter and infrared oil separation instrument Harbin <>

Infrared moisture meter uses the absorption of infrared light by water molecules in the substance to determine the moisture content<> infrared oil meter uses the absorption of infrared light by oil molecules in the substance to determine the oil content of dust<>

Easy to operate and other advantages<>

It is very likely that the extract is impure and contains oil. After extraction, the oil content of the original water sample was increased.

Generally, carbon tetrachloride is used as an extractant, which requires a high purity, otherwise petroleum will be high.

Generally, the infrared oil tester has a description of which manufacturer to buy the reagent, so it is recommended that you change the carbon tetrachloride reagent to try it.

Like our HJ-OIL-6 infrared oil tester software, it is generally written that you can buy it from Tianjin Chemical Reagent Factory No. 1.