In the Customs Classification, all sorts of imported articles are classified under the certain tariff number. It is not too much to say that only human beings and air do not have tax numbers. If the tariff number is different, the tariff rate may be different. Thus, the Customs Classification is very important and sometimes the chemical analysis plays a fatal role for the classification.

This article briefly explains the customs analyses. The examples are familiar goods such as tuna, textile and salt etc.

• Electron Microscope (Aluminum oxide or artificial corundum?)
• DNA Analysis (Determining the species of tuna)
• Textile Analysis (Natural or chemical fiber?)
• Comonomer unit wt% Measurement (Copolymer or not?)
• Salt Analysis (Checking the elements in salt)
• Oil Analysis (What are the differences between gasoline, kerosene, and light oil?)
• Rubber Test (Plastic or synthetic rubber?)

Major Analytical Equipment: Introduction of equipment and devices used for analyses