Use of Sulphide Minerals as Electrode Sensors for Acid–Base Potentiometric Titrations in Non-Aqueous Solvents and Their Application for the Determination of Certain Biologically Active Substances

2010 ◽  
Vol 8 (6) ◽  
pp. 784-791 ◽  
Author(s):  
Zoran Simíc ◽  
Zorka Staníc ◽  
Milan Antonijevíc
Keyword(s):  
Biologically Active Substances ◽  
Biologically Active ◽  
Acid Base ◽  
Potentiometric Titrations ◽  
Sulphide Minerals ◽  
Active Substances

scholarly journals SPECTROPHOTOMETRIC DETERMINATION OF ANTIOXIDANT SODIUM METABISULPHITE CONTENT IN PREPARED MEDICINAL FORMS OF VETERINARY MEDICINAL PRODUCTS

2020 ◽  
Vol 21 (2) ◽  
pp. 189-198
Author(s):  
H. Yu. Teslyar ◽  
M. Ya. Smolinska ◽  
I. Ya. Kotsyumbas ◽  
N. M. Chyhyn ◽  
N. G. Rohulia ◽  
...  
Keyword(s):  
Spectrophotometric Determination ◽  
Storage Time ◽  
Analytical Signal ◽  
Veterinary Drugs ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Optimal Conditions ◽  
Sodium Metabisulphite ◽  
Active Substances

An analytical method for the quantitative determination of antioxidant sodium metabisulphite in veterinary drugs has been proposed by spectrophotometric method. Based on the literature data, the optimal conditions of the analytical reaction were selected experimentally. The dependence of the value of the analytical signal on the temperature of the reaction medium, concentration of p-rosaniline and duration of the reaction was investigated to establish the optimal conditions of the analytical reaction and obtain a stable analytical signal. The stability of the colored analytical form in time was also checked and the linear dependence of the value of the analytical signal on the concentration of sodium metabisulphite was investigated. The analytical reaction at room temperature is optimal. The maximum analaytical signal is achieved by carrying out the analytical reaction for 10 minutes and then practically does not change for an hour. To achieve the maximum analytical signal, it is necessary to use a 20-fold excess of dye relative to sodium metabisulphite. The analytical signal remains stable only for the first hour, then gradually begins to decrease. Metrological characteristics of the method of determination of metabisulphite in veterinary drugs are calculated, the limits of spectrophotometric determination are 0.33 – 2.50 μg/ml. The correctness of the developed method was checked on model solutions by the method of "introduced-found" method of comparison in the presence of various biologically active substances that are part of drugs together with sodium metabisulphite. The content of sodium metabisulphite in veterinary drugs of domestic and foreign production at different intervals of their storage time was established. It is shown that the content of sodium metabisulphite in drugs decreases during their storage time, until complete disappearance, which directly affects the content of the active substance, because in the absence of antioxidant oxidative processes with biologically active substances begin to take place.

scholarly journals Flavonoid’s Content Determination in Irradiated Samples via Spectrophotometric Analysis

2019 ◽  
Vol 5 (10) ◽  
pp. 32-39 ◽  
Author(s):  
A. Sarukhanov ◽  
A. Morozova ◽  
N. Vasilyeva ◽  
D. Krylenkin
Keyword(s):  
Quantitative Determination ◽  
Raw Materials ◽  
General Information ◽  
Spectrophotometric Analysis ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Qualitative And Quantitative ◽  
Content Determination ◽  
Active Substances

General information about biologically active substances flavonoids is concisely presented. The need for the quantitative determination of its content in products and the influence of product processing on flavonoid’s content is justified. Methods of qualitative and quantitative determination of flavonoids content in various products, medications and raw materials were studied. Based on this study the method of quantitative determination of flavonoid’s in samples of irradiated coriander is compiled and tested. Further ways to improve and adjust the compiled method for flavonoid’s content determination in irradiated samples via spectrophotometric analysis is considered.

A kinetic determination of ultramicroquantities of some biologically active substances

1980 ◽  
Vol 25 (3) ◽  
pp. 380-387 ◽  
Author(s):  
G.A. Milovanović ◽  
T.J. Janjić ◽  
S. Petrović ◽  
G. Kuzmanović
Keyword(s):  
Biologically Active Substances ◽  
Biologically Active ◽  
Kinetic Determination ◽  
Active Substances

scholarly journals Biological value of raspberry fruits

2019 ◽  
Vol 26 (1) ◽  
pp. 21-25
Author(s):  
V. Voitsekhivskyi ◽  
A. Andrusyk ◽  
B. Vaskivskyi ◽  
O. Voitsekhivska ◽  
S. Vaskivska ◽  
...  
Keyword(s):  
State Standard ◽  
Research Field ◽  
The State ◽  
Biologically Active Substances ◽  
Biologically Active ◽  
Organoleptic Evaluation ◽  
Long Time ◽  
Processed Products ◽  
Active Substances

The human body needs a constant flow of biologically active substances. Berry products, including raspberries, are a source of natural and affordable BAS. Raspberry berries contain a complex of BAS, in particular fructose, glucose, organic acids, vitamins A, B1, B2, C, P, E, essential oils, pectins, fiber, complex of polyphenols, copper salt, iron, potassium, folic acid, etc. Berries are salicylic acid and can for a long time maintain the beneficial properties of various processed products. Berries contain a lot of food fibers, it is beneficial for digestion. Berries contain betasitosterol and anthocyanins have anti-sclerotic properties, and coumarins normalize blood coagulation. Berries contain a lot of food fibers, it is beneficial for digestion. Raspberry berries contain coarse dietary fiber, β-sitosterol, anthocyanins and coumarins, these substances have a positive effect on digestion, have anti-sclerotic properties and normalize blood clotting. The purpose of the research aimed at carrying out a comparative characterization of the basic biochemical substances content and the quality of various berries and raspberry hybrids grown at the research field "Fruit and Vegetable Garden" of NULES of Ukraine. During the research the complex of international and state regulatory documents were used, in particular: the berries were selected in the state of technical maturity, in accordance with the state standard 7179: 2010; the sample size corresponded to ISO 874-2002; the determination of the components of the biochemical composition was carried out: the content of dry soluble substances were determined according to ISO 2173-2013, invert sugars – state standard 4954: 2008, titrated acids – state standard 4957: 2008, ascorbic acid – ISO 6557-2: 2014; organoleptic evaluation – according to the generally accepted methodology. Based on the obtained results, it was found that among the studied samples of berry varieties Babine Lito, Sontse Kieva, hybrids – Hybrid №4a, Hybrid №2 were characterized by the highest organoleptic and biochemical parameters, therefore it is expedient to use them both for consumption in a fresh form and for processing. The obtained results should be taken into account during the planning of raspberry planting and in further selective work during the creation of competitive varieties and hybrids of raspberries with a high content of biologically active substances in berries.

scholarly journals Determination of biologically active substances in protein-berry concentrates

2018 ◽  
Vol 6 (2) ◽  
pp. 208-216
Author(s):  
Olena Grek ◽  
Olena Onopriichuk ◽  
Тetiana Pshenychna ◽  
Alla Tymchuk
Keyword(s):  
Biologically Active Substances ◽  
Biologically Active ◽  
Active Substances
Sign in / Sign up

Export Citation Format

Share Document