Journal
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
Volume 25, Issue 12, Pages 1969-1973Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0ja00062k
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Funding
- National Natural Science Foundation of China [10874047]
- Division of Laboratory and Facility Management of SCUT
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The trace mercury ions in aqueous solutions were electrically deposited on the surface of a high purity copper plate and then quantitatively analyzed by laser ignition assisted spark-induced breakdown spectroscopy (LI-SIBS). Laser ignition is helpful to enhance discharge stability and reduce the required voltage level in SIBS. The analysis sensitivity of mercury in LI-SIBS was enhanced by a factor of 30 in comparison with that in laser-induced breakdown spectroscopy (LIBS). A 6% relative standard deviation has been achieved in multiple measurements and the limit of detection of mercury in aqueous solutions by LI-SIBS has reached to 2 mu gL(-1) under present experimental conditions. LI-SIBS overcomes the low-sensitivity shortcoming of LIBS on the analysis of mercury. By combining with electrical deposition enrichment, LI-SIBS provides a simple and ultra-sensitive analysis method for mercury ions in water.
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