Critical evaluation of the application of photochemical vapor generation in analytical atomic spectrometry

Yihua He; Xiandeng Hou; Chengbin Zheng; Sturgeon, Ralph E.
June 2007
Analytical & Bioanalytical Chemistry;Jun2007, Vol. 388 Issue 4, p769
Academic Journal
Chemical vapor generation (CVG) is a widely adopted sample introduction method for analytical atomic spectrometry. Nonvolatile precursors (usually ionic, metallic or organometallic species) can be transferred from the condensed phase to the gas phase, yielding the advantages of efficient matrix separation, high analyte transport efficiency, high selectivity, simple instrumentation, and ease of automation. Hydride generation enjoys the greatest popularity as a consequence of its ease of implementation, fast reaction and high yield; but photo-CVG, a newly emerging research field in analytical chemistry, may provide a powerful alternative to conventional CVG due to its simplicity, versatility and cost effectiveness. Although photocatalytic pre-reduction has been used for a number of years, the most attractive aspect of this newly emerging area is the direct generation of volatile species using photochemical reactions. Recent studies undertaken with flow through and batch reactors employing low molecular weight organic acids as photochemical agents are highlighted in this study for such systems as mercury and selenium, as well as reaction mechanisms considered for these processes. Discussion is focused on recent advances in photo-CVG, which we believe will become the subject of intensive future research initiatives.


Related Articles

  • Laser-induced photofragmentation of triethylaluminum: Modeling H-atom production. Brum, Jeffrey L.; Deshmukh, Subhash; Koplitz, Brent // Journal of Chemical Physics;12/1/1990, Vol. 93 Issue 11, p7946 

    A rate-equation approach is presented that models H-atom formation during the pulsed laser photolysis of a triethyl metal compound, the specific case being triethylaluminum excited at 193 nm. An excimer laser initiates the chemistry under collisionless conditions, and H atoms are produced that...

  • State resolved photofragmentation of Ni(CO)4 at 193, 248, and 308 nm: A detailed study of the photodissociation dynamics. Schlenker, F. J.; Bouchard, F.; Waller, I. M.; Hepburn, J. W. // Journal of Chemical Physics;11/15/1990, Vol. 93 Issue 10, p7110 

    The vibrational, rotational, and translational energy distributions for the CO photofragments from the 193, 248, and 308 nm photolysis of Ni(CO)4 in a supersonic molecular beam have been determined by vacuum ultraviolet laser-induced fluorescence. The measured product energy distributions...

  • Passivation of carbon-doped GaAs layers by hydrogen introduced by annealing and growth ambients. Kozuch, D. M.; Stavola, Michael; Pearton, S. J.; Abernathy, C. R.; Hobson, W. S. // Journal of Applied Physics;4/15/1993, Vol. 73 Issue 8, p3716 

    Examines heavily C-doped GaAs epilayers grown by metalorganic molecular beam epitaxy and metalorganic vapor phase epitaxy by infrared absorption, secondary ion mass spectrometry and Hall measurements. Experimental procedures; Properties of C-H complexes in GaAs:C epitaxial layers; Conclusion.

  • Synthesis of Metallothionein-Mimic Decapeptides with Heavy Atom Signaling Properties. Rivero, Ignacio A.; Gonzalez, Tania; Diaz-Garcia, Marta E. // Combinatorial Chemistry & High Throughput Screening;Aug2006, Vol. 9 Issue 7, p535 

    The automated parallel solid-phase synthesis of a 17-member library of metallothionein-mimic decapeptides carrying a Lariat ether group is described. The peptides were synthesized in good yield and the identity and quality of each product were performed by mass spectrometry and IR. Subsequently,...

  • Characteristics of altered layers formed by sputtering with a massive molecular ion containing diverse elements with large mass differences. Fujiwara, Yukio; Kondou, Kouji; Nonaka, Hidehiko; Saito, Naoaki; Fujimoto, Toshiyuki; Kurokawa, Akira; Ichimura, Shingo; Tomita, Mitsuhiro // Journal of Applied Physics;Oct2007, Vol. 102 Issue 7, p073509 

    Tetrairidium dodecacarbonyl (Ir4(CO)12) is an organometallic compound called metal cluster complex which has a molecular weight of 1104.9. To investigate its irradiation effect, silicon substrates sputtered with 10 keV Ir4(CO)7+ were analyzed by high resolution Rutherford backscattering...

  • Patterned aluminum growth via excimer laser activated metalorganic chemical vapor deposition. Higashi, G. S.; Fleming, C. G. // Applied Physics Letters;4/21/1986, Vol. 48 Issue 16, p1051 

    Excimer laser photolysis of organoaluminum adlayers has been used to catalytically activate the deposition of Al via thermal decomposition of triisobutylaluminum. The process exhibits good spatial selectivity and patterns with 4 μm resolution have been accurately reproduced. Patterned Al...

  • Metalloenediynes: Advances in the Design of Thermally and Photochemically Activated Diradical Formation for Biomedical Applications. Bhattacharyya, Sibaprasad; Zaleski, Jeffrey M. // Current Topics in Medicinal Chemistry;Nov2004, Vol. 4 Issue 15, p1637 

    The remarkable discovery of the enediyne antitumor antibiotics almost two decades ago has led to significant developments in the systematic design and study of simple synthetic enediyne constructs and their Bergman cyclization reactivities. Advances in understanding both the geometric and...

  • Recent Trends in Biomimetic NADH Regeneration. Quinto, Tommaso; Köhler, Valentin; Ward, Thomas // Topics in Catalysis;Mar2014, Vol. 57 Issue 5, p321 

    Nicotinamide adenine dinucleotide (NADH) and nicotinamide adenine dinucleotide phosphate constitute a major cost factor in preparative biotransformations. The development of efficient methods for their regeneration with cheap reducing equivalents has been an area of intense research in the last...

  • Uranium azide photolysis results in C–H bond activation and provides evidence for a terminal uranium nitride. Thomson, Robert K.; Cantat, Thibault; Scott, Brian L.; Morris, David E.; Batista, Enrique R.; Kiplinger, Jaqueline L. // Nature Chemistry;Sep2010, Vol. 2 Issue 9, p723 

    Uranium nitride [U≡N]x is an alternative nuclear fuel that has great potential in the expanding future of nuclear power; however, very little is known about the U≡N functionality. We show, for the first time, that a terminal uranium nitride complex can be generated by photolysis of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics