Elimination efficiency of different reagents for the memory effect of mercury using ICP-MS

Abstract

The present study was carried out to solve the problems of long washout time and non-linear calibration curves encountered in mercury analysis using inductively coupled plasma mass spectrometry. Comparisons of the washing efficiency for different reagents to eliminate the mercury memory effect were made. Of all the selected washing reagents, mercapto reagents such as 2-mercaptoethanol and L-cysteine could efficiently clean the instrument. Taking the toxicity and odor of mercaptoalkanol into account, L-cysteine was preferred as the most suitable washing reagent and was added into the standard and sample solutions. A good linear calibration curve was obtained with the correlation coefficient of 0.9999. The detetion limit for addition of L-cysteine was 0.024 mg l À1 . Addition of 0.18% L-cysteine into the sample solution also facilitates the washout of mercury even using deionized water. The recoveries of mercury in certified reference materials, i.e. human hair and dogfish muscle, were 97.2% and 98.3%, respectively, when using 0.18% L-cysteine in the sample solutions.

Highly Sensitive and Selective Colorimetric Sensing of Hg2+ Based on the Morphology Transition of Silver Nanoprisms

“…The traditional techniques currently available for the detection of mercury ions (Hg 2+ ) include atomic absorption, 6 atomic emission, 7 atomic fluorescence, 8,9 and inductively coupled plasma mass spectrometries. 10 Although these methods offer excellent sensitivity and multielement analysis, they are sophisticated, costly, complicated processes and time-consuming. Therefore, it is critical to explore a simple, rapid, and inexpensive method for the determination of Hg 2+ .…”

High throughput sample introduction system for the analysis of drinking waters and wastewaters by ICP-MS

“…49,50 As discussed above, one approach to solving this problem has been in the removal of the spray chamber. Other approaches have involved the use of a controlled temperature spray chamber.…”

Accumulation of mercury in rice grain and cabbage grown on representative Chinese soils

“…Hg concentrations in plants and soils were measured by Inductively Coupled Plasma Mass Spectrometry (ICP-MS; Agilent 7500a, USA). HNO 3 -EDTA was used as a cleaning fluid to eliminate the residual effect of Hg using ICP-MS (Li et al, 2006). Standard reference materials (SRMs) for soils and plant samples were included in the digestion and analysis as a part of the quality control protocol, and 3 replications were conducted for each sample.…”