Time-resolved micelle-stabilized room-temperature phosphorimetry for simultaneous determination of gallium and indium

1991 ◽  
Vol 103 (3-4) ◽  
pp. 199-207 ◽  
Author(s):  
Yi-Ming Liu ◽  
Jose Ignacio Garcia Alonso ◽  
Maria Rosario Fernández de la Campa ◽  
Marta Elena Diaz Garcia ◽  
Alfredo Sanz-Medel
Keyword(s):  
Simultaneous Determination ◽  
Room Temperature ◽  
Time Resolved

Kalman filtering-aided time-resolved solid-surface room temperature phosphorimetry for simultaneous determination of tetracyclines in solution

1993 ◽  
Vol 112 (1-4) ◽  
pp. 47-54 ◽  
Author(s):  
Fausto Alava-Moreno ◽  
Yi-Ming Liu ◽  
Marta Elena D�az-Garc�a ◽  
Alfredo Sanz-Medel
Keyword(s):  
Simultaneous Determination ◽  
Kalman Filtering ◽  
Solid Surface ◽  
Room Temperature ◽  
Time Resolved

Kalman filtering-aided time-resolved solid-surface room temperature phosphorimetry for simultaneous determination of anthracyclines in solution

The Analyst ◽  
1998 ◽  
Vol 123 (4) ◽  
pp. 691-694 ◽  
Author(s):  
Fausto Alava-Moreno ◽  
María Jesús Valencia-González ◽  
Marta Elena Díaz-García
Keyword(s):  
Simultaneous Determination ◽  
Kalman Filtering ◽  
Solid Surface ◽  
Room Temperature ◽  
Time Resolved

Simultaneous determination of mercury speciation in biological materials by GC/CVAFS after ethylation and room-temperature precollection

1994 ◽  
Vol 40 (4) ◽  
pp. 602-607 ◽  
Author(s):  
L Liang ◽  
N S Bloom ◽  
M Horvat
Keyword(s):  
Simultaneous Determination ◽  
Room Temperature ◽  
Detection System ◽  
Inorganic Mercury ◽  
Biological Materials ◽  
Atomic Fluorescence Spectrometry ◽  
Atomic Fluorescence ◽  
Monomethyl Mercury ◽  
Isothermal Gas

Abstract We developed a method for the simultaneous determination of monomethyl mercury (MMHg), inorganic mercury [Hg(II)], and total mercury (THg) in biological materials. A variety of biological materials can be digested in methanolic KOH solution. The MMHg and Hg(II) present are converted to volatile ethyl derivatives, methylethyl mercury and diethyl mercury, by an aqueous-phase ethylation reaction with sodium tetraethylborate. The ethyl derivatives are precollected onto a trapping column at room temperature, in case of disconnection with the separation/detection system, and then thermally desorbed into a packed isothermal gas chromatography (GC) column. Eluted organo-Hg compounds from the GC column are decomposed into Hg0, and detection is completed by cold vapor atomic fluorescence spectrometry (CVAFS). Pure standard solutions can be used for calibration. The sum of MMHg and Hg(II) obtained by this method equals the THg value obtained by digestion with HNO3 and H2SO4, reduction with SnCl2, and single-stage amalgamation/CVAFS for all biological materials studied. Absolute detection limits are 0.6 pg and 1.3 pg of Hg as MMHg and Hg(II), respectively, corresponding to 0.3 ng and 0.6 ng/g (wet) of sample.

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