Fumisense An Instrument for the Measurement of Phosphine, Methyl Bromide and Sulfuryl Fluoride during Fumigation
Phosphine, methyl Bromide and sulfuryl fluoride are the common fumigants used by the fumigators for different commodities and under different circumstances. At present, no single instrument is available, which can measure all the three gases using the same instrument in the concentration rangeof interest to the fumigators. The present instrument developed by us, uses a thermal conductivity detector for the measurement of methyl bromide(0-200 mg/L)and sulfuryl fluoride(0-100 mg/L). For the measurement of phosphine(0-2000 ppm)it uses an electrochemical sensor. There are two sampling lines, one for methyl bromide or sulfuryl fluoride and the other one for the measurement of phosphine. The instrument is fully microprocessor based and all the operations are menu driven, which makes the instrument extremely user friendly. The instrument is calibrated for phosphine,methyl bromide and sulfuryl fluoride with a choice to select the gas and the sampling line. Two inbuih sample draw pumps are used on two sampling lines to draw the sample air to the monitor and put it back to the source. Two thousand measurement data can be stored in the microprocessor of the monitor with gas name, silo number and all other pertinent parameters. The data can later be downloaded on the computer. The instrument is ideally suited for fumigators using all the three fumigants. The paper also discusses the pros and cons of different measurement techniques used for the detection of phosphine, methyl bromide and sulfuryl fluoride.
fumigation monitoring gas detection
R.C.Naik R.D.Shroff
United Phosphorus Limited Chemo Electronic Laboratory
国际会议
成都
英文
211-213
2008-09-21（万方平台首次上网日期，不代表论文的发表时间）