Chemical analysis and instrumental analysis of the differences and their characteristics - chemical analysis, instrumental analysis - Education Industry

Chemical analysis is the use of measurement of chemical reaction and its relationship to determine the composition of the tested material and content of a class analysis. Be determined when the use of chemical Reagent , Balance And some glassware.

Instrumental Analysis (Modern analysis or physical analysis): it is based on the physical and material or physical and chemical properties and established methods of analysis. Such methods usually measure the optical, electrical, magnetic, acoustic, thermal and other physical and get results, and measure these physical quantities, generally use more complex or special equipment, it is referred to as "instrumental." In addition to instrumental analysis can be used for qualitative and quantitative analysis can be used for the structure, valence state, state analysis, micro-and thin-layer analysis, trace and ultra trace analysis, is to analyze the chemical development.

Compared to chemical analysis, instrumental analysis has the following characteristics:
1. L-level or even lower. Suitable for micro, trace and ultra trace elements determination.g,high sensitivity, detection limit can be reduced. Such as the amount of the chemical analysis of samples of mL, mg level down to instrument analysis
2. Selective. Many of the instrumental analysis method can be determined by selecting or adjusting the conditions for the determination of the coexistence of components, the mutual interference will not occur.
3. Is simple, fast, easy to automate.
4. Relative error larger. Chemical analysis is generally used for constant and high level of component analysis, higher accuracy, the error is less than a few per thousand. Most large relative error of instrumental analysis, usually 5%, does not apply to the constant and high levels of component analysis.
5. Instrumental analysis require special equipment more expensive price.

The same two points:
1. Could be taken as qualitative and quantitative methods of analysis. Chemical analysis is generally used for constant and high level of component analysis, higher accuracy, the error is less than a few per thousand. Most large relative error of instrumental analysis, usually 5%, does not apply to the constant and high levels of component analysis.
2. Of the same principle.