The simultaneous analysis of respiratory gases in the presence of nitrous oxide is described. The modified gas chromatographic technique used is especially applicable to dental situations where continuous monitoring is not necessary. It employs readily available equipment and does not involve interference with other dental procedures.

Simultaneous analysis of respiratory gases and nitrous oxide in dental patients.

The proposed sample preparation for the gaschromatographic determination of methohexital in serum by using SEP-PAK C18 cartridges is superior to the usual extraction by organic solvents because of its good reliability and practicability. Its main advantages are: 1) constantly high recovery; 2) complete removal of endogenous substances that might interfere with the determination resulting in a rather specific method; 3) ease of handling.

Rapid sample preparation for the gas-chromatographic determination of methohexital in serum using reversed phase cartridges

Rapid, sensitive gas-chromatographic quantitation of methohexital in plasma of oral-surgery outpatients.

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Rapid, sensitive gas-chromatographic quantitation of methohexital in plasma of oral-surgery outpatients.