Reduction of mercury(II) by electrons contained in carbon dots: An environmentally friendly cold vapor generation for mercury analysis

2020 ◽  
Vol 31 (10) ◽  
pp. 2678-2682
Author(s):  
Tao Chen ◽  
Yao Lin ◽  
Haochen Li ◽  
Rui Yang ◽  
Xiandeng Hou ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Environmentally Friendly ◽  
Vapor Generation ◽  
Cold Vapor ◽  
Cold Vapor Generation ◽  
Mercury Analysis

Cold-Vapor Generation for Inductively Coupled Argon Plasma/Atomic Emission Spectrometric Analysis. Part 3. Mercury

1994 ◽  
Vol 77 (2) ◽  
pp. 473-480 ◽  
Author(s):  
Kim A Anderson ◽  
Brandon Isaacs ◽  
Mark Tracy ◽  
Gregory Möller
Keyword(s):  
Detection Limit ◽  
Argon Plasma ◽  
Atomic Emission ◽  
Plasma Atomic Emission ◽  
Vapor Generation ◽  
Test Portion ◽  
Cold Vapor ◽  
Inductively Coupled ◽  
Drinking Water Standard ◽  
Cold Vapor Generation

Abstract A method is presented for the determination of total mercury in environmental samples by inductively coupled argon plasma/atomic emission spectroscopy (ICP/AES) using cold-vapor generation. A 1.0 g or 10 mL test portion is digested 6–12 h in a 16 × 150 mm, 10 mL volumetric test tube at room temperature and is subsequently digested on a programmed heating block at 95°C with trace-metal grade nitric acid. The digested samples are next treated with potassium permanganate and heated between 70 and 95°C; thereafter, oxalic acid is added to reach the final endpoint. The mercury(II) is reduced by sodium borohydride in a simplified continuous manifold. A standard pneumatic nebulizer effects the gas–liquid separation of mercury. Mercury is quantitated by ICP/AES at 194.232 nm. The instrument detection limit for the method is 0.2 μg/L. Water samples are analyzed directly. The detection limit is below the current National Primary Drinking Water Standard Maximum Concentration Limit of 2 μg/L for mercury. For a 10:1 dilution of a nominal 1.0 g solid test portion, the detection limit is 2.0 μg/L. This concentration is also less than the regulatory limit of 200 μg/L for the U.S. Environmental Protection Agency’s Toxicity Characteristic Leaching Procedure. The quantitation is linear up to 300 μg/kg. The method demonstrated statistical control for samples of biological and environmental interest.

Determination of mercury in gasoline diluted in ethanol by GF AAS after cold vapor generation, pre-concentration in gold column and trapping on graphite tube

2010 ◽  
Vol 96 (1) ◽  
pp. 32-36 ◽  
Author(s):  
Daiane P. Torres ◽  
Ingrid M. Dittert ◽  
Heinrich Höhn ◽  
Vera L.A. Frescura ◽  
Adilson J. Curtius
Keyword(s):  
Graphite Tube ◽  
Vapor Generation ◽  
Cold Vapor ◽  
Cold Vapor Generation ◽  
Gf Aas

Use of a Solution Cathode Glow Discharge for Cold Vapor Generation of Mercury with Determination by ICP-Atomic Emission Spectrometry

2008 ◽  
Vol 80 (18) ◽  
pp. 7043-7050 ◽  
Author(s):  
Zhenli Zhu ◽  
George C.-Y. Chan ◽  
Steven J. Ray ◽  
Xinrong Zhang ◽  
Gary M. Hieftje
Keyword(s):  
Glow Discharge ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Vapor Generation ◽  
Cold Vapor ◽  
Cold Vapor Generation
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