Zobrazeno 1 - 10
of 14
pro vyhledávání: '"S. M. Leshchev"'
Autor:
S. M. Leshchev, O. N. Mikhniuk
Publikováno v:
Doklady of the National Academy of Sciences of Belarus. 65:422-430
A comparison of the capabilities of two methods for extraction-chromatographic determination of narcotic drugs and psychotropic substances in various objects (syrups, ointments, tablets, herbal mixtures, etc.), the screening methanol method commonly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a633eabb78361f716349b332b38a5ac
https://doi.org/10.29235/1561-8323-2021-65-4-422-430
https://doi.org/10.29235/1561-8323-2021-65-4-422-430
Autor:
S. M. Leshchev, O. N. Mikhniuk
Publikováno v:
Proceedings of the National Academy of Sciences of Belarus, Chemical Series. 57:177-184
In extraction systems hexane–water, hexane–aqueous solutions of inorganic salts (sodium chloride, dipotassium phosphate and potassium carbonate), chloroform–water using the method of gas chromatography–mass spectrometry, the distribution cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15fe5fd5f848ec5b1aacf9fdb74525c0
https://doi.org/10.29235/1561-8331-2021-57-2-177-184
https://doi.org/10.29235/1561-8331-2021-57-2-177-184
Publikováno v:
Journal of Analytical Chemistry. 74:601-608
A standardized procedure is developed for the determination of chloramphenicol in food products of animal origin of different groups using HPLC with tandem mass spectrometric detection with a limit of detection of 0.2 µg/kg. The extraction of chlora
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7414fe45fb90d6c135e3c529ac533c9f
https://doi.org/10.1134/s1061934819060108
https://doi.org/10.1134/s1061934819060108
Publikováno v:
Аналитика и контроль. 23:494-500
Using gas chromatography methods with the quadrupole mass spectrometric detector and flame ionization detector, as well as high-performance liquid chromatography with the diode-matrix detector, the distribution constants of codeine, phenobarbital, mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3234b263c2f234cb43506a2e2ba0f408
https://doi.org/10.15826/analitika.2019.23.4.004
https://doi.org/10.15826/analitika.2019.23.4.004
Publikováno v:
Journal of Analytical Chemistry. 63:629-636
The distribution of ethanol and butanol between n-hexane and aqueous solutions of ammonium sulfate at 20 ± 1°C was studied over an ideal concentration region of the substances in the organic phase. The distribution constants of the substances and t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::935913ff1c0fcc8b591028b77fa765d1
https://doi.org/10.1134/s1061934808070058
https://doi.org/10.1134/s1061934808070058
Autor:
S. M. Leshchev, N. P. Novik
Publikováno v:
Journal of Structural Chemistry. 45:323-326
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28ff5cdae9ad58cdae8e37dbe1734f9f
https://doi.org/10.1023/b:jory.0000048885.78795.6f
https://doi.org/10.1023/b:jory.0000048885.78795.6f
Autor:
A. V. Sin'kevich, S. M. Leshchev
Publikováno v:
Russian Journal of Applied Chemistry. 76:1483-1488
The solubilities of anthracene, tetracene, 1,2-benzanthracene, chrysene, pyrene, perylene, α,α'-dinaphtyl, rubrene, and decacyclene in solvents of different nature and polarity (hydrocarbons and halogenated hydrocarbons, alcohols, ketones, ethers,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::445abb03d1ae3a3688ac3cbb93c0a569
https://doi.org/10.1023/b:rjac.0000012672.20129.30
https://doi.org/10.1023/b:rjac.0000012672.20129.30
Autor:
N. P. Novik, S. M. Leshchev
Publikováno v:
Journal of Structural Chemistry. 43:85-88
Some regularities of the energetics of structure formation in mixtures of polar organic solvents not forming layered structures with liquid hydrocarbons and in mixtures of inert and low-polar diluents at 20\( \pm 1{\kern 1pt} {\kern 1pt} ^\circ C\) w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1dba6b539bc6b1bebfc70db47a9c97f
https://doi.org/10.1023/a:1016025900552
https://doi.org/10.1023/a:1016025900552