Wyniki wyszukiwania - Biblioteka Nauki

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 7

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

Systemowa i szybka ocena jakosci ziarna zboz

100%

Kubicki S. , Kos S. , Krause A.

nr 09

26-28

Zanieczyszczenia wod pestycydami

100%

Dabrowski J. , Krause A. , Filary Z. , Majchrzak J.

1992

tom 32

nr 1

33-43

Column switching and liquid chromatographic technique for the rapid determination of fenoxycarb insecticide residues in apples

100%

Michel M. , Krause A. , Buszewski B.

tom 10

nr 4

Fenoxycarb residues are analyzed by column switching and reversed-phase high performance liquid chromatography (RP-HPLC). The active ingredient is extracted from apples on a silica gel column using a n-hexane - diethyl ether mixture. The eluate is evaporated, dry residue dissolved in acetonitrile-deionized water, and injected into the liquid chromatograph with a column switching system (C8 columns), and a UV-photodiode array detector (UV - PDA). The analyte is quantified by the external standard method. The average recoveries of the active ingredient from the spiked sample are 81.3 +/- 3.2% and 80.3 +/- 5.8%, the coefficients of variation are 3.9% and 7.2% for fortification levels 0.1 mg/kg and 0.05 mg/kg, respectively, and the limit of quantification at lambda = 228 nm is 0.05 mg/kg. Labor and organic solvent uses are greatly reduced in comparison to the existing methods. The overall procedure allows a sample throughput of up to 30 samples per day. The method was applied to the determination of fenoxycarb residue in apples from treated orchards.

XIII Ogolnopolski Zjazd Kwiaciarzy

100%

Krause A. , Chrzaszcz M. A.

2001

nr 2

Development and validation of a stability-indicating LC-UV method for the determination of doripenem and biapenem in pharmaceutical dosage forms

88%

Cielecka-Piontek J. , Krause A. , Zalewski P. , Lunzer A. , Jelińska A.

2012

tom Vol. 24, no. 2

207--219

A stability-indicating LC assay method was developed and validated for the quantitative determination of doripenem and biapenem in pharmaceutical dosage forms in the presence of degradation products formed during forced degradation studies. An isocratic RP-HPLC method was developed with a C-18 (250 mm × 4.6 mm, 5 μm) column and 12 mM ammonium acetate-acetonitrile (96:4 υ/υ) as mobile phase. The flow rate of the mobile phase was 1.0 mL min-1 for doripenem and biapenem. The determination was carried out at the wavelength of 295 nm. The carbapenems were subjected to stress conditions of degradation in aqueous solutions including hydrolysis, oxidation, photolysis, and thermal degradation. The developed method was validated with respect to linearity, accuracy, precision, selectivity, and robustness.

Obraz skazen pozostalosciami pestycydow upraw rolnych i gleb w Polsce w latach 1991-1995

51%

Dabrowski J. , Gasior J. , Janda T. , Krause A. , Morzycka B. , Murawska M. , Sadlo S. , Barylska E. , Gierschendorf Z. , Giza I. , Langowska B. , Martinek B. , Michel M.

nr 1

57-76

Fermenty naturalne i fermenty nieorganiczne

44%

Krause A.

nr 01