In the specific operation of infrared spectroscopy, for solid samples, there are four commonly used sample preparation methods: (1) Tableting method, which is to disperse the fine powder of the solid sample uniformly in the alkali metal halide and compress it into A method of transparent flakes; (2) The powder method is to grind a solid sample into a powder below 2 μm, suspend in a volatile solvent, and then spread this suspended droplet on the KBr film base to form after the solvent evaporates A method of uniform powder thin layer; (3) Thin film method is to dissolve the solid sample in an appropriate solvent, pour the solution on a glass slide or KBr window, and produce a uniform thin film after the solvent volatilizes Methods; (4) The paste method is to disperse or suspend the solid powder in a paste such as paraffin oil, and then sandwich the paste between two windows such as KBr to map its spectrum [1]. One of the most commonly used is the tableting method, but this method often needs to be reworked due to problems such as inappropriate sample concentration or opaque films.
Top
and Base Jewelry Box is the kind of jewelry box consists of two parts: the cap
and the base box. This kind of jewelry box is classic style, customers can
easily open it and show the jewelry inside completely.
Brand
Name: Jinao
Place
of Origin: Guangdong, China(mainland)
Surface
Material: Customized
Inner
Material: Velvet/ foamed plastic
Color:
Customized
Size:
Multi-size + Customized
Feature:
Classic/ Elegant
Logo
Printing: Customized
Usage: Jewelry Box/
Gift Box
Top And Base Jewelry Box
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