A new technique for online measurement of total and water-soluble copper (Cu) in coarse particulate matter (PM)

作者：Wang Dongbin; Shafer Martin M; Schauer James J; Sioutas Constantinos^*

来源：Environmental Pollution, 2015, 199: 227-234.

DOI：10.1016/j.envpol.2015.02.006

• Online Cu measurement
• Copper ISE
• Modified Biosampler
• Coarse PM

This study presents a novel system for online, field measurement of copper (Cu) in ambient coarse (2.5 -10 mu m) particulate matter (PM). This new system utilizes two virtual impactors combined with a modified liquid impinger (BioSampler) to collect coarse PM directly as concentrated slurry samples. The total and water-soluble Cu concentrations are subsequently measured by a copper Ion Selective Electrode (ISE). Laboratory evaluation results indicated excellent collection efficiency (over 85%) for particles in the coarse PM size ranges. In the field evaluations, very good agreements for both total and water-soluble Cu concentrations were obtained between online ISE-based monitor measurements and those analyzed by means of inductively coupled plasma mass spectrometry (ICP-MS). Moreover, the field tests indicated that the Cu monitor could achieve near-continuous operation for at least 6 consecutive days (a time resolution of 2-4 h) without obvious shortcomings.

• 出版日期2015-4