1. Gas Chromatography–Mass Spectrometry Analysis of High-Purity Volatile Inorganic Hydrides

   • A. Yu. Sozin
   • V. A. Krylov
   • G. V. Pushkarev

   REVIEWS 13 May 2021 Pages: 535 - 545

   

2. Preconcentration of Hydrophilic Organophosphorus Substances on a Hypercarb Adsorbent

   • E. N. Goncharova
   • M. A. Statkus
   • G. I. Tsizin

   ARTICLES 13 May 2021 Pages: 546 - 554

   

3. Liquid Phase Microextraction of Chloridazon from Environmental Water and Soil Samples by Supramolecular Solvent-Impregnated TiO₂ Coated Polypropylene Hollow Fibers

   • Fatemeh Shahrezaei
   • Mohammad Bagher Gholivand
   • Mojtaba Shamsipur

   ARTICLES 13 May 2021 Pages: 555 - 562

   

4. Application of Response Surface Methodology for Pipette-Tip Micro Solid-Phase Extraction of Nicotine from Cigarette, Seawater and Human Plasma by a Novel Carbon Nanotube/Zinc Oxide Nanocomposite Sorbent Following its Determination by Spectrophotometry

   • Sayyed Hossein Hashemi
   • Nasrin Naruie

   ARTICLES 13 May 2021 Pages: 563 - 572

   

5. Identification of Archaeological Wood Species by IR Spectroscopy

   • V. M. Pozhidaev
   • Ya. E. Sergeeva
   • E. B. Yatsishina

   ARTICLES 13 May 2021 Pages: 573 - 577

   

6. A Direct Method for Determining Sulfur in Carbon Materials by Atomic Emission Spectrometry with an Arc Excitation Source

   • D. O. Antonov
   • E. G. Silkis
   • B. K. Zuev

   ARTICLES 13 May 2021 Pages: 578 - 584

   

7. DNA-Templated Silver Nanoclusters Used as a Label-Free Fluorescent Probe for the Detection of O⁶-Methyltransferase Activity

   • Van-Trong Nguyen
   • T. T. Nha Tran
   • ThanhThuy Tran

   ARTICLES 13 May 2021 Pages: 585 - 591

   

8. Identification of Cationic and Anionic Surfactants by Chromatography–Mass-Spectrometry in the Microextraction–Fluorimetry Screening of Water and Food Products

   • V. G. Amelin
   • Z. A. Ch. Shogah
   • D. S. Bol’shakov

   ARTICLES 13 May 2021 Pages: 592 - 602

   

9. Development and Optimization of a Method for Organochlorine Pesticides Determination in Mussels Based on Miniaturized Matrix Solid-Phase Dispersion Combined with Gas Chromatography–Tandem Mass Spectrometry

   • Nieves Carro
   • Ángel López
   • Ana Mouteira

   ARTICLES 13 May 2021 Pages: 603 - 612

   

10. A New Approach to the Assessment of the Safety of Tea, Coffee, Cocoa, and Vegetable Oils, Based on the Rapid Screening of Samples for the Total Concentration of Fluorine-, Chlorine-, and Bromine-Containing Organic Compounds

    • I. A. Revel’skii
    • M. E. Chivarzin
    • A. K. Buryak

    ARTICLES 13 May 2021 Pages: 613 - 620

11. Gas Chromatography–Mass Spectrometry Combined with Successive Dilution for the Determination of Preservatives in Pharmaceuticals

    • Eman Wajeh Ammen
    • Suhad Al-Salihi
    • Raghad Al-Salhi

    ARTICLES 13 May 2021 Pages: 621 - 629

    

12. A Procedure for Determining Dexketoprofen Trometamol in Human Plasma and Its Validation

    • A. P. Lakeev
    • E. A. Yanovskaya
    • V. V. Udut

    ARTICLES 13 May 2021 Pages: 630 - 640

    

13. Statistical Evaluation of the Standard Deviation of Chromatographic Retention Time in the Capillary Column Temperature Programming Mode

    • V. I. Abdrakhmanov
    • S. A. Dobrotin
    • V. I. Logutov

    ARTICLES 13 May 2021 Pages: 641 - 652

    

14. Amperometric Tyrosinase Biosensors Modified by Nanomaterials of Different Nature for Determining Diclofenac

    • R. M. Beilinson
    • A. A. Yavisheva
    • H. C. Budnikov

    ARTICLES 13 May 2021 Pages: 653 - 659

    

15. Determining Intersecting Ball-Point Ink Strokes with Different Aging

    • Paula Querol Sabater
    • Oscar Díaz Santana
    • Daura Vega Moreno

    ARTICLES 13 May 2021 Pages: 660 - 670

    

16. Methodological Aspects of Analytical Chemistry

    • Freddy Adams
    • Mieke Adriaens

    LETTER TO THE EDITOR 13 May 2021 Pages: 671 - 673