Contents

Journal of Analytical Chemistry

Vol. 76, No. 2, 2021

Reviews

Plant-Matrix Certified Reference Materials as a Tool for Ensuring the Uniformity of Chemical Measurements

I. E. Vasil’eva and E. V. Shabanova p. 137  abstract

Articles

Multi-walled Carbon Nanotubes Magnetic Composite as an Adsorbent for Preconcentration and Determination of Trace Level Vanadium in Water Samples

Hayati Filik and Asiye Aslıhan Avan p. 156  abstract

Selective Recognition and Separation of Ubiquitin by Nanoparticle Embedded Cryogel Traps with Ubiquitin Memories based on Photosensitive Covalent Imprinting

İbrahim Dolak, Rüstem Keçili, Filiz Yılmaz, Arzu Ersöz and Rıdvan Say p. 165  abstract

A Continuous Sample Drop flow-based Microextraction Method for Spectrophotometric Determination of Cobalt with 1-(2-pyridylazo)-2-Naphthol in Water Samples

Mohanna Ezati, Soleyman Moinfar, Somayeh Mohammadi and Gholamreza Khayatian p. 172  abstract

Determination of Lanthanides in Coal Fly Ash, Sediment and Monazite Sand by Inductively Coupled Plasma Optical Emission Spectrometry After Separation using Oxalate form of Ion-exchange Resin

Gumma Venkateswarlu, Puttam Reddy Mamatha, Shanmugam Thangavel and Athyala Christian Sahayam p. 180  abstract

Using Chemically Active Additives for the Arc Atomic Emission Determination of Boron in Graphite

N. I. Zolotareva and S. S. Grazhulene p. 185  abstract

Determination of Vitamin E (α-Tocopherol Acetate) on the Surface of Human Skin by IR Fourier-Transform Spectrometry and Study of Some Aspects of Its Transdermal Transfer

I. N. Fadeikina, E. S. Peunkova and B. K. Zuev p. 191  abstract

Determination of Carotenoids of Tomato Fruits of Different Colors

V. I. Deineka, T. G. Burzhinskaya, L. A. Deineka and I. P. Blinova p. 196  abstract

A Study of the Metabolism of the New Nootropic Preparation Unifiram by Ultra-High Performance Liquid Chromatography–High-Resolution Mass Spectrometry

A. Z. Temerdashev, M. O. Zorina, E. V. Dmitrieva and A. A. Azaryan p. 204  abstract

Optimization of the Procedures and Conditions for the Simultaneous Determination of Amicarbazone and Its Metabolites in Environmental Samples and Plant Matrices by High-Performance Liquid Chromatography with UV Detection

T. D. Chermenskaya and E. Yu. Alekseev p. 212  abstract

Determination of Zoledronic Acid and Creatinine by Hydrophilic Chromatography

L. A. Kartsova, V. D. Somova and E. A. Bessonova p. 221  abstract

Identification and Determination of Nonionic Surfactants by Ultrahigh-Performance Liquid Chromatography–High-Resolution Mass Spectrometry

V. G. Amelin and D. S. Bol’shakov p. 226  abstract

A Novel in Situ Electrochemical Strategy for Gatifloxacin Microdetermination in Urine using Solid Contact and Disposal Screen-printed Electrodes: a Comparative Study

Mohamed K. Abd El-Rahman, Rania A. Sayed, Manal S. El-Masry, Wafaa S. Hassan and Abdalla Shalaby p. 243  abstract

Label-free DNA Electrochemical Aptasensor for Fumonisin B1 Detection in Maize based on Graphene and Gold Nanocomposite

Yating Zheng, Zhiyu Shi, Wenda Wu, Chenghua He and Haibin Zhang p. 252  abstract

Differential Scanning Calorimetry as a Method for the Control of Vegetable Oils

O. B. Rudakov, I. A. Saranov, An Nguen Van, L. V. Rudakova and K. K. Polyanskiy p. 258  abstract

A New Analytical Method for Calcium Quantification in danio rerio Scales

Marta Carnovali, Sara Pasqualetti, Giuseppe Banfi and Massimo Mariotti p. 267  abstract