Trompetter, W.J.; Ancelet, T. 2013 Air particulate matter study during operation of Arc discharge equipment. Lower Hutt, N.Z.: GNS Science. GNS Science report 2013/24 42 p.
Abstract: In response to Health and Safety (H&S) questions and concerns regarding particulate matter emissions from the Arc discharge chamber used for producing nanopowders, a study was undertaken to assess the impact of the operation on air quality, both inside the laboratory and outdoors where the chamber vents. Three sampling periods were undertaken when the Arc discharge chamber was in operation, using Streaker samplers to collect hourly samples of air particulate matter (APM). Each Streaker sampling period, of approximately two days, included times when the Arc discharge chamber was in operation. For the first two Streaker sampling periods, nanopowder production in the arc discharge chamber was based on Permalloy 78 (Ni: 78 %, Fe: 22 %). During the third sampling period, nanopowder production was based on 100 % Ti. The composition of the APM collected was determined using ion beam analysis (IBA) and light absorption techniques. The elemental concentrations were used to estimate sources based on knowledge of APM chemistry and are presented in this report. (auth)