No abstract

The saturated vapour concentrations at 35" of 21 organo-mercury compounds have been determined by static and dynamic methods and the corresponding partial pressures derived. For 14 of these compounds, together with mercury and mercuric chloride, values at 25' and 45' have also been determined and the constants in the linear pressure-temperature relation calculated. Some correlation between chemical constitution and vapour pressure has been noted. IntroductionDespite their inherent toxicity, the good fungicidal and bactericidal properties of organomercury compounds have encouraged their widespread use in agriculture. To assess the inhalation hazard arising from the use of eradicant sprays and the dressing of stored seed, the clinical data on intrinsic toxicity must be supplemented with knowledge of the approximate volatility of each compound. Since the published vapour pressure data in this field are scanty, it was decided to determine experimentally the saturated vapour concentrations of as many of the organo-mercurials currently in use as could be obtained.Whereas grain is usually stored in a cool atmosphere and the bulk of fruit spraying in this country is over orchard crops, some fungicidal aerosols are employed in greenhouses, notably on tomatoes. Taking into consideration the English climate and the ventilation procedure

An automated procedure is described for the determination of alkaloids in cigarette smoke using low toxicity reagents. Cyanogen chloride is formed on line from potassium thiocyanate and sodium hypochlorite. The procedure is compared with the previously used cyanogen bromide method which also uses Auto Analyser II methodology.

No abstract

No abstract