1. Herrn Professor Dr. rer. nat. habil. Heinrich Kriegsmann

   • H. Nöth

   Announcement Pages: 525 - 525

2. A contribution to the trace analysis of high-purity iron by atomic spectrometry (flame-AAS, furnace-AAS, ICP-OES)

   • Joeng-Shein Chen
   • Harald Berndt
   • Günther Tölg

   Original Papers Pages: 526 - 534

3. Flame atomic absorption spectrometric determination of cadmium and copper in biological reference materials using on-line sorbent extraction preconcentration

   • Shukun Xu
   • Michael Sperling
   • Bernhard Welz

   Original Papers Pages: 535 - 540

4. Determination of cadmium in orthophosphoric acid by graphite furnace atomic absorption spectrometry

   • Anne-Marie Wifladt
   • Ragnar Bye
   • Walter Lund

   Original Papers Pages: 541 - 544

5. Ion-exchange separation of metal cations on a dodecylsulphate-coated C 18 column in the presence of complexing agents

   • Pavel Janoš
   • Miroslav Broul

   Original Papers Pages: 545 - 548

6. A method for the determination of theophylline in serum by isotope dilution mass spectrometry

   • F. Susanto
   • S. Humfeld
   • H. Reinauer

   Original Papers Pages: 549 - 553

7. Simultaneous determination of Zn(II) and Ni(II) in the presence of crown ether by dc polarography

   • Takuzo Kurotu

   Short Communications Pages: 554 - 555

8. Separation of molybdenum as ascorbate complex by extraction with Aliquat 336S from associated elements

   • C. P. Vibhute
   • S. M. Khopkar

   Short Communications Pages: 555 - 556

9. Studies on substrates for the spectrophotometric determination of hydrogen peroxide based on the catalytic effects of peroxidase-like metalloporphyrins

   • Fang Wang
   • Yan-Zhong Wu
   • Yun-Xiang Ci

   Short Communications Pages: 556 - 558

10. Detection of morphine and monoacetylmorphine (MAM) in human hair

    • B. Ahrens
    • F. Erdmann
    • H. Schütz

    Short Communications Pages: 559 - 560

11. Acknowledgement to referees in 1992

    Acknowledgments Pages: A7 - A7