Toluene is a colorless transparent liquid with a chemical formula of C8H10. It is one of the isomers of benzene and has an aromatic taste. Toluene is widely used as solvent, raw material and reaction intermediate, and is often used in the production of plastics, resins, dyes, medicines, etc.
Toluene (methylbenzene) is a commonly used organic solvent, mainly used in coatings, printing inks, glues, plastics and other industries. Its main properties include physical properties, chemical properties, environmental properties and toxicological properties.
Detection performance
The following is a table of some important properties of toluene and their detection methods:
| performance | describe | Detection method |
|---|---|---|
| Relative density | At normal temperature, the relative density of toluene is 0.87-0.89 | Gravimetry |
| Refractive index | At room temperature, the refractive index of toluene is 1.496-1.498 | Refractometry |
| moisture | The lower the moisture content, the better the quality of toluene | Determination of moisture titration |
| acidity | Excessive acidity can cause toluene to deteriorate | Determination of acid-base titration |
| Oxide | The content of oxides has an effect on the quality of toluene | Iodometric determination |
| the remains | Excessive residue levels can cause toluene to deteriorate | Determination by distillation |
| Solubility | Solubility of toluene with other substances | Determination by specific gravity method or gas chromatography |
| toxicology | Including acute toxicity, chronic toxicity, mutagenicity, carcinogenicity, etc. | Animal experiments or in vitro cell assays |
These properties can be detected by different experimental methods, such as gravimetric method, refraction method, titration method, iodometric method, distillation method, specific gravity method, gas chromatography, animal experiment or in vitro cell experiment, etc. These methods require strict experimental control to ensure the accuracy and reliability of the test results.
Detection method
The main detection methods of toluene include physical detection and chemical detection.
Physical inspection includes:
The concentration of toluene in the air can be measured by gas chromatography after air sampling;
Toluene in liquids and solids can be detected using chromatography;
In the workplace, on-site detection instruments such as combustible Gas Detectors can be used for rapid detection.
Chemical testing includes:
Toluene can be separated and purified by extraction, distillation, chromatography and other methods for mass determination;
For toluene in water, gas chromatography or liquid chromatography can be used for detection.
Beichao reminds you: Different toluene samples may require different detection methods, and the specific detection method should be selected according to the actual situation and requirements.
