ASSESSMENT OF CARBON MONOXIDE DOSAGE IN AKURE CENTRE

Abstract

This study investigates carbon monoxide dosage, its statistical distribution and also derived simple empirical models for its means and standard deviation. Carbon monoxide concentration data from the month of March, 2009 to February, 2010 were used. The data were collected using Lascar ELUSB- CO portable data logger. Carbon monoxide concentration was sampled every 60 seconds through the day. The frequency of occurrence of Carbon monoxide dosage that falls within a given concentration threshold of 0.05, 11.5, and 26 ppm for 1-hourly and 0.9, 12.9, and 21.9 ppm for 8- hourly were investigated to obtain the number of events. Simple empirical model for the mean and standard deviation were obtained from the graphs and previous works. Results show that the number Carbon monoxide dosage event followed a quasi-parabolic pattern, the distribution of Carbon monoxide dosage over time belongs to the exponential family. The Mean and Standard deviation depend on the 3 monthly averages and the selected thresholds. Months of May and June have the least Carbon monoxide concentration while the month of October has the highest number of days of exceedence. Also from the results, the observed and computed values of means and standard deviation of Carbon monoxide dosage are similar. The model derived can be used to predict the Mean and Standard deviation of Carbon monoxide dosage given the Threshold and the 3 monthly averages.