Cold-vapor atomic absorption spectrometry CVAAS

Cold Vapor Atomic Absorption Spectrometry (CVAAS)... 

Diethyldithiocarbamate, pyrrolidin-1 -yldithioformate, and diphenylthiocarbazone (dithizone), as three mercury chelate forming reagents, were used for the preconcentration of ultratrace amounts of inorganic mercury and methyl mercury in silica Cig minicolumn as the solid sorbent. Sample FI online sorbent extraction was coupled with continuous cold vapor atomic absorption spectrometry (CVAAS) for detection. The results showed the superiority of the carbamate type reagents over the dithizone for the online formation and preconcentration of the corresponding mercury chelate. The detection limit was found to be 16 ng/L of mercury. The structures of these organic chelate modifiers are shown in Scheme 17. 

In order to validate the ASV method for mercury determination on BDD, a comparison with cold-vapor atomic absorption spectrometry (CVAAS) has also been carried out using a real sample (KCl impinger solution) obtained from the flue gas of a coal-... 

Detection limits are presented for 61 elements by ten analytical determinative methods FAAS flame atomic absorption spectrometry ETAAS electrothermal atomization atomic absorption spectrometry HGAAS hydride generation atomic absorption spectrometry including CVAAS cold vapor atomic absorption spectrometry for Hg ICPAES(PN) inductively coupled plasma atomic emission spectrometry utilizing a pneumatic nebulizer ICPAES(USN) inductively coupled plasma atomic emission spectrometry utilizing an ultrasonic nebulizer ICPMS inductively coupled plasma mass spectrometry Voltammetry TXRF total reflection X-ray fluorescence spectrometry INAA instrumental activation neutron analysis RNAA radiochemical separation neutron activation analysis also defined in list of acronyms. 

CSV cathodic stripping voltammetry CVAAS cold vapor generation atomic absorption spectrometry (specific for Hg) CVAFS cold vapor atomic fluorescence spectrometry... 

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