GB/T 32199-2015Standard practice for general techniques for obtaining infrared spectra for qualitative analysis (English PDF)

1.1

standard spectral range covered is 4000cm-1 ~ 50cm-1, applies to the use of infrared spectroscopy for liquid, solid and gaseous

Samples for qualitative analysis, qualitative analysis of the amount of the sample is not restricted. Wavenumber spectrum can also be used above the near-infrared region of 4000cm-1

Qualitative analysis.

1.2

This standard does not involve security issues relating to the actual use of the process. Users are to determine the limitations of the standard applications, and

We have the responsibility to develop appropriate safety and health practices. Specific preventive measures see 5.5.1.

4.1

Infrared (IR) is a qualitative analysis by identifying groups of [1] to [3], or compare the unknown sample with standard samples of known infrared absorption spectrum,

Or a combination of both analysis methods. These spectra can be by means of infrared light transmission, reflection, and other technologies, such as photoacoustic spectroscopy (PAS) such as access to [4] to [8]. Spectra for comparison should be obtained under the same techniques and the same conditions. Users should note that not all public

Open standard published spectra are entirely appropriate [9] - [16].

4.1.1

IR instruments and accessories used in qualitative analysis can be obtained from commercial sources. User shall be provided in accordance with the manufacturer

Manual operation, in order to ensure safe operation of equipment in the best condition.

4.2

will be a uniform thickness of the film sample is placed in the optical path of the infrared transmission spectra obtained vertical position (to eliminate interference generated sample film strip

Grain method, see 8.5.1. Sample thickness should be appropriate, in the position of the absorption peak of the analyzed reaching the detector of infrared light energy to be reduced sufficiently low.

The absorbance of the strongest absorption band is preferably between 1 and 2, the other band absorbance should be around 0.6. Since the polarity of the measured sample molecules exist

Differences, there will be exceptions. For example, non-polar saturated hydrocarbons, CH2 asymmetric stretching vibration at 2920cm-1 has a strong absorption becomes […]