qualitative and quantitative analysis

Qualitative analysis: Determining the composition of a substance, including elements, ions contained in inorganic substances, and functional groups contained in organic substances, is called qualitative analysis in chemistry. Qualitative analysis mainly includes the appearance observation and preparation of the sample, preliminary tests (such as flame color test, burning test and dissolution test, etc.), cation analysis and anion analysis, etc.
Quantitative analysis: Determining the content of elements, ions, functional groups and other components in a substance is called quantitative analysis in chemistry. Acid-base neutralization titration is an important quantitative analysis.
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polymer materials, fibers, proteins, textile fabrics, chemical products, melamine, biological products, fluorite minerals, hair dyes, organic matter, polymers, ceramic tiles, etc.

1, dry analysis: The sample used in
does not need to be made into a solution, such as molten bead analysis, flame color analysis, atomic emission spectrometry, X-ray fluorescence spectrometry, etc.
2, wet analysis:
requires the sample to be prepared into a solution. Commonly used solvents include water, acid, and alkali solutions. For samples insoluble in the above solvents, fluxes such as sodium carbonate, sodium peroxide, and potassium sulfate can be used to melt and decompose the sample, and then be dissolved in water or dilute acid.
3, chemical analysis method:
volumetric analysis method: acid-base titration, redox titration, complexometric titration, precipitation titration.
gravimetric analysis method
4, instrumental analysis method
chromatographic analysis method: gas chromatography, liquid chromatography
electrochemical analysis method: voltammetric analysis, coulometric analysis, potentiometric analysis.
0 optical analysis methods: atomic absorption method, atomic emission method, infrared spectroscopy, ultraviolet spectroscopy, absorption photometry, Raman spectroscopy.
1 Mass spectrometry
2 Nuclear magnetic resonance
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