Year: 1903
Type: article
Abstract: A METHOD for the rapid estimation of CHCI3 vapour in mix- tures of C0C13 and air by means of the alteration of pressure produced by absorption of the C0HCI3 vapour by olive oil is described in the BRITISH MEDICAL JOURNAL Of July 12th, 1902, and was demonstrated last July to the Physiological Society.'It was then stated that the method is applicable to mixtures of chloroform and air between 2 and IO per ioo, and the state- ment was confirmed by Pro!essor Dunstan for amounts between 3 and 12 per ioo.2The original purpose of the present observations was to test the method for mixtures below 2 per ioo.The actual determinations have been made in this laboratory by Dr. Victor Geets, of Brussels, who has, in prosecuting the inquiry, adopted a very simple method of control, which is in itself a very satisfactory laboratory method for the quantitative estimation of the percentage of chloroform vapour in a mixture of chloroform and air.This method consists in the direct weighing on a chemical balance of a flask of known capacity (circa 500 c.cm.), (a) filled with air, (b) filled with the mixture of chloroform and air.The adequacy of this datum as regards an estimation of percentage will be made clear by the following considera- tions: 500 c.cm. of a I to io per Ioo mixture of chloroform and air implies 5 to 50 c.cm. of 01C)13 vapour, weighing (on the assumption that I gram of liquid CHC13=200 c.cm. 0C1I03 vapour) 25 to 250 mg.minus the weight of the volume of air displaced by the CHC13 vapour.The-weight of a lltre of CHCJ3 vapour at o°C. 32+3+ro06 = 2 xoXo895=5-325 grams.Ditto, of a litre of air=I.293grams.
Source: BMJ
Author: S. W. Cole
Institution: University of London
Language: English
Subfield: Surgery
Field: Medicine
Domain: Health Sciences
Open Access status: bronze
OpenAlex ID: W2053862394