The quantitative dermination of quartz in coal dust by infrared spectroscopy.
Larsen-DJ; Doenhoff-LJ; Crable-JV
Am Ind Hyg Assoc J 1972 Jun; 33(6):367-372
Airborne coal dust is collected on mixed cellulose ester membrane filters which are ashed in a low temperature asher. The ash is prepared into a potassium-bromide pellet, and the infrared spectrum from 900 per cm to 700 per cm. The absorbance at 800 per cm is calculated and the weight of quartz determined from a standard curve. Interferences from kaolin and limestone are avoided. The method is applicable for a range of 10 to 100 microgram of quartz. An average sample is estimated to have 1 to 2 mg coal dust on the filter; the minimum sample size necessary is 0.4 mg.
Air-monitoring; Technique; Coal-mines; NIOSH-Author
American Industrial Hygiene Association Journal