Determination of hydrocarbons by infrared intensity spectroscopy

2 Determination of hydrocarbons by infrared intensity spectroscopy General remarks (see also Chapter 2) 

The energy of most molecular vibrations lies in the infrared range of the electromagnetic spectrum. The characteristic vibrations of particular func- 

The quantitative determination of hydrocarbons in water and waste water with infrared intensity spectroscopy is technically a form of IR photometry 

The procedure is the same as for method. 1.8.1, except that 1,1,2-trichloro-trifluoroethane must be used instead of n-hexane. 

For this method of analysis, the level of hydrocarbons in the water should be over 0.01 mg/1 or better still over 0.1 mg/1. 

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