Alternative methods for internal quality control in research laboratories for environmental analysis: a programme for the performance evaluation of equipment, methods and staff J. WielingH. A. BakkerenJ. A. D. van Renesse van Duivenbode Original Papers Pages: 703 - 711
Application of scanning electrochemical microscopy and scanning electron microscopy for the characterization of carbon-spray modified electrodes Gunther WittstockHendrik EmonsWilliam R. Heineman Original Papers Pages: 712 - 718
Simultaneous determination of seven trace impurities (Al, As, Cr, Fe, Ti, V and Zr) in high-purity nickel metal and nickel oxide by coprecipitation and inductively coupled plasma-atomic emission spectrometry Osamu KujiraiKei Yamada Original Papers Pages: 719 - 723
A study on the adsorption voltammetry of titanium with various heterocyclic azo-compounds Jinkui ZhouRolf Neeb Original Papers Pages: 724 - 729
Adsorptive stripping voltammetric measurements of trace amounts of platinum(II) and ruthenium(III) in the presence of 1-(2-pyridylazo)-2-naphthol M. S. El-ShahawiA. Z. Abu ZuhriM. M. Kamal Original Papers Pages: 730 - 735
Studies on the voltammetric behaviour of a 2-mercaptoimidazole containing carbon paste electrode: determination of traces of silver Xiaohua CaiKurt KalcherBožidar Ogorevc Original Papers Pages: 736 - 741
Potentiometric estimation of sulfide ion using the Fe(III)-EDTA complex P. S. VermaT. Venkateshwar RaoG. C. Joshi Original Papers Pages: 742 - 744
Supercritical fluid chromatography (SFC) of linear and cyclic components in technical silicone oils U. JustF. MellorF. Keidel Original Papers Pages: 745 - 748
Significance of keto-enol-tautomery in the analysis of 1,2,4-triazinone metabolites H. DieckmannR. KreuzigM. Bahadir Original Papers Pages: 749 - 753
Determination of nanomolar levels of guanine by differential-pulse adsorptive cathodic stripping voltammetry of its copper(II) complex R. M. ShubietahA. Z. Abu ZuhriA. G. Fogg Original Papers Pages: 754 - 757
Evaluation of humic complexes of trace metals in river water by adsorption on indium-treated XAD-2 resin and DEAE-Sephadex A-25 anion exchanger Masataka HiraideShinya HiramatsuHiroshi Kawaguchi Original Papers Pages: 758 - 761
HPLC determination of lipophilic photosynthetic pigments in algal cultures and lake water samples using a non-endcapped C18-RP-column Peter WoitkeChrista-Dora MartinJohannes-Günter Kohl Original Papers Pages: 762 - 768
Chemical enhancement method for spectrophotometric determination of antimony at nanogram levels S. NaliniN. BalasubramanianT. V. Ramakrishna Short Communications Pages: 769 - 770
Heterogeneous catalytic oxidation of S(IV) to S(VI) by molecular oxygen: Rapid activity determination as an analytical application T. RühleO. TimpeR. Schlögl Short Communications Pages: 771 - 772
Spectrophotometric determination of chromium(VI) with ferron S. P. AryaAnvita Bansal Short Communications Pages: 772 - 775
Determination of selenium in soils with square-wave cathodic stripping voltammetry C. L. RojasS. B. de MarotoP. Valenta Short Communications Pages: 775 - 776
Isolation and characterization of thiosalicylic acid selenotrisulfide Yoshihiro SaitoMasahiko ChikumaYutaka Saito Short Communications Pages: 776 - 777
Ionization gauge sensitivities of N2, O2, N2O, NO, NO2, NH3, CClF3 and CH3OH M. SchulteB. SchlosserW. Seidel Short Communications Pages: 778 - 780
Development of protective polymer coatings for silver halide fibers and their application as threshold level sensors for chlorinated hydrocarbons in sea water R. GöbelR. KrskaA. Katzir Short Communications Pages: 780 - 781
Thin-layer chromatography of glucose and sorbitol on Cu(II)-impregnated silica gel plates O. HadžijaB. ŠpoljarLj. Sesartić Short Communications Pages: 782 - 782
