1. Analysis of systematic errors in calibrating glass electrodes with H⁺ as a concentration probe

   • S. Fiol
   • F. Arce
   • M. Sastre de Vicente

   Original Papers Pages: 469 - 472

2. Separation and determination of micromolar ammonia, nitrite, and nitrate from a single small sample

   • G. T. Richardson
   • J. A. Davies
   • J. G. Edwards

   Original Papers Pages: 473 - 474

3. Liquid anion-exchange separation of vanadium from malonate media

   • R. R. Rao
   • S. M. Khopkar

   Original Papers Pages: 475 - 481

4. Determination of zirconium, barium, lanthanum, aluminium, sodium, hafnium and fluorine in fluorozirconate glasses

   • O. Abollino
   • E. Mentasti
   • M. Braglia

   Original Papers Pages: 482 - 487

5. Spectrophotometric determination of manganese in low-alloy steels after its extraction as triphenylsulphonium permanganate

   • D. Thorburn Burns
   • M. Harriott
   • S. A. Barakat

   Original Papers Pages: 488 - 490

6. In situ detection of monovalent copper in aerosols by photoemission

   • M. Ammann
   • R. Hauert
   • H. Burtscher

   Original Papers Pages: 491 - 496

7. Inter-laboratory comparison of methods used for analysing polycyclic aromatic hydrocarbons (PAHs) in soil samples

   • Iris Blankenhorn
   • Dirk Meijer
   • Robert J. van Delft

   Original Papers Pages: 497 - 504

8. Determination of ¹²⁹I in large soil samples after alkaline wet disintegration

   • K. Bunzl
   • W. Kracke

   Original Papers Pages: 505 - 508

9. Simultaneous determination of perylene and benzo[g,h,i]perylene by synchronous fluorescence using a micellar system

   • A. Bermejo Martín-Lázaro
   • J. Hernández García
   • J. J. Santana Rodríguez

   Original Papers Pages: 509 - 512

10. Comparison of collinear and transverse photothermal deflection spectroscopy for trace analysis of pesticides in water

    • B. Bohnert
    • W. Faubel
    • H. J. Ache

    Original Papers Pages: 513 - 517

11. Spectrophotometric determination of microquantities of Carbidopa using the Carbidopa-iron(III)-phenylfluorone ternary complex in micellar medium

    • Prodromos B. Issopoulos
    • Pantelis T. Economou

    Original Papers Pages: 518 - 522

12. Caffeine and theobromine in coffee, tea and cola-beverages

    • M. C. Gennaro
    • C. Abrigo

    Original Papers Pages: 523 - 525

13. Effectiveness of palladium as a chemical modifier for the determination of lead in biological materials and foodstuffs by graphite furnace atomic absorption spectrometry

    • Wim Penninckx
    • Desire L. Massart
    • Johanna Smeyers-Verbeke

    Original Papers Pages: 526 - 531

14. The integrated multivariate approach for the development of dry reagent strips for quantitative clinical analysis

    • M. Ehrlich
    • D. Wienke
    • G. Kateman

    Original Papers Pages: 532 - 540

15. Direct potentiometric immunoelectrodes

    • Ursula Pfeifer
    • Wolfram Baumann

    Original Papers Pages: 541 - 549

16. Fluorometric determination of hydrogen peroxide with peroxidase and 1-methyl-1,2,3,4-tetrahydro-β-carboline-3-carboxylic acid

    • Takafumi Ohta
    • Yuki Yamauchi
    • Shoji Takitani

    Original Papers Pages: 550 - 552