00631naa#a2200181#i#450# EN\\bibl\83714 20240817201659.6 2499-9962 20231227b2023####ek#y0engy0150####ca RU MDA PHOTOMETRY IN SOLUTIONS: COMPARISON OF METHODS OF DIRECT OPTICAL DENSITY DATA AND DERIVATIVE SPECTROSCOPY Journal article Sevastopol Federal State Educational Institution of Higher Education Sevastopol State University 2023 8 с. Journal article local Smirnova O. D. Kalashnikova I. V. Kurbatov G. A. rusjbpc.ru