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British Journal of Anaesthesia, 1972, Vol. 44, No. 4 306-312
© 1972 The Board of Management and Trustees of the British Journal of Anaesthesia

research-article

ABSORPTION SPECTRA OF THE COMMON ANAESTHETIC AGENTS IN THE FAR ULTRA-VIOLET

A. M. BARRETT and J. F. NUNN

Division of Anaesthesia, Clinical Research Centre Watford Road, Harrow, Middlesex, HA1 3UJ, England.

Absorption spectra have been recorded for eight common anaesthetic agents in the ultra-violet range 187–300 nm. Spectra for the agents in aqueous solution showed only minor differences from those obtained in the gaseous state, and the ratios of the absorbances were roughly proportional to the water/gas partition coefficients. The spectra for different agents overlapped each other, and those for methoxyflurane and diethyl ether are entirely overlapped by the absorption curve of oxygen. Cyclopropane showed no absorption in the range tested but, for other agents, ultra-violet analysis is convenient and sensitive. The possibility of interference with analysis for other substances is discussed.


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