Discussions on Chemistry Terminology in the Journal Chemistry Archive

U uvodnom dijelu rada prikazan je ukratko razvoj hrvatskoga kemijskoga nazivlja, što se naročito počelo poticati u drugoj polovici 19. stoljeća u skladu s ciljevima hrvatskoga narodnog preporoda i s razvojem prirodnih znanosti. Prikazane rasprave o kemijskom nazivlju i imenima spojeva u razdoblju 1927–1953. pokazuju kako u tom razdoblju unatoč dugogodišnjim nastojanjima nije postignuta suglasnost. Pred hrvatskim je kemičarima zadaća da u suradnji s hrvatskim jezikoslovcima izrade vlastiti strukovni jezik.The introductory part of the paper presents a brief outline of the development of the Croatian chemistry terminology, which was particularly encouraged in the second half of the 19th century, in accordance with the objectives of the Croatian National Revival and the development of natural sciences. The discussions on chemistry terminology and the classification of compounds (nomenclature) in the period 1927-1953 show that despite years long efforts, no agreement was reached in that period. The Croatian chemists, working together with the Croatian linguists, have before them the task of formulating their own register

75. obljetnica Tehničkih fakulteta Sveučilišta u Zagrebu

Vijest o 75. obljetnici Tehničkih fakulteta Sveučilišta u Zagrebu

Ultrasonic Extraction and TLC Determination of Glyphosate in the Spiked Red Soils

Pesticides that get into soil bind mostly to its solid phase by physical or chemical processes. In the valley of the Neretva River the use of herbicides, especially of glyphosate is widespread and sometimes uncontrolled. In this work ultrasonic solvent extraction (USE) followed by thin-layer chromatography (TLC) was applied for determining glyphosate presence in soil. The experiments were conducted with two characterised soil types. The impact of soil composition on extraction efficiency is discussed. Chemical analysis showed that soil 1 contained much more iron and aluminium oxides than soil 2, which was richer in humic substances. Low glyphosate efficiency (ca 44 % in both soils) could be attributed either to its binding to iron and aluminium oxides (soil 1), or to chemisorption on humic macromolecules (soil 2)

Quantitative Determination of Pesticides in Soil by Thin-layer Chromatography and Video Densitometry

Reversed phase thin-layer chromatography (RP-TLC) in conjunction with video densitometry has been used for the quantitative determination of a six-component mixture of pesticides. Excellent separation of propham, chlorpropham, atrazine, diflubenzuron, tetramethrin and α-cypermethrin was achieved using the methanol/water solvent system (volume fraction of methanol, φ = 80%). Video densitometric quantification was validated for linearity, precision and detection limit. All results were satisfactory according to the validation requirements. The method was tested for the determination of pesticides from spiked soil using ultrasonic extraction with various solvents