Gary W. Schieffer : rechercher sur Z-Library

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1

Reversed-phase high-performance liquid chromatographic investigation of levodopa preparations II: Levodopa determination

Gary W. Schieffer

Journal:

Journal of Pharmaceutical Sciences

Année:

1979

Langue:

english

Fichier:

PDF, 290 KB

english, 1979

2

Reversed-phase high-performance liquid chromatographic investigation of levodopa preparations I: Amino acid impurities

Gary W. Schieffer

Journal:

Journal of Pharmaceutical Sciences

Année:

1979

Langue:

english

Fichier:

PDF, 347 KB

english, 1979

3

Simultaneous stability-indicating determination of phenylephrine hydrochloride, phenylpropanolamine hydrochloride, and guaifenesin in dosage forms by reversed-phase paired-ion high-performance liquid chromatography

Gary W. Schieffer, David Emlyn Hughes

Journal:

Journal of Pharmaceutical Sciences

Année:

1983

Langue:

english

Fichier:

PDF, 506 KB

english, 1983

4

Simultaneous determination of Methyl, Ethyl, Propyl, and Butyl 4-hydroxybenzoates and 4-Hydroxybenzoic acid in liquid antacid formulations by gas chromatography

Gary W. Schieffer, Philip J. Palermo, Susan Pollard-Walker

Journal:

Journal of Pharmaceutical Sciences

Année:

1984

Langue:

english

Fichier:

PDF, 409 KB

english, 1984

5

Determination of the structure of a synthetic impurity in guaifenesin: Modification of a high-performance liquid chromatographic method for phenylephrine hydrochloride, phenylpropanolamine hydrochloride, guaifenesin, and sodium benzoate in dosage forms

Gary W. Schieffer, Warren O. Smith, Gwen S. Lubey, Daniel G. Newby

Journal:

Journal of Pharmaceutical Sciences

Année:

1984

Langue:

english

Fichier:

PDF, 295 KB

english, 1984

6

Reversed-phase high-performance liquid chromatography with differential pulse polarographic detection for assaying drugs in feed : Stability-indicating assay of diacetolol

Gary W. Schieffer

Journal:

Journal of Chromatography A

Année:

1980

Langue:

english

Fichier:

PDF, 570 KB

english, 1980

7

Limitation of assessing high-performance liquid chromatographic peak purity with photodiode array detectors

Gary W. Schieffer

Journal:

Journal of Chromatography A

Année:

1985

Langue:

english

Fichier:

PDF, 213 KB

english, 1985

8

Comments on “Ion-exchange liquid chromatographic analysis of bisphosphonates by on-line post-column photochemical reaction and spectrophotometric detection”

Gary W Schieffer

Journal:

Journal of Chromatography A

Année:

2002

Langue:

english

Fichier:

PDF, 29 KB

english, 2002

9

PRESSURIZED LIQUID EXTRACTION AND MULTIPLE, ULTRASONICALLY-ASSISTED EXTRACTIONS OF HYDRASTINE AND BERBERINE FROM GOLDENSEAL ( HYDRASTIS CANADENSIS ) WITH SUBSEQUENT HPLC ASSAY

Schieffer, Gary W., Pfeiffer, Kristine

Journal:

Journal of Liquid Chromatography & Related Technologies

Année:

2001

Langue:

english

Fichier:

PDF, 196 KB

english, 2001

10

Pre-column electrochemical cell for high-performance liquid chromatography

Schieffer, Gary W.

Journal:

Analytical Chemistry

Année:

1979

Langue:

english

Fichier:

PDF, 352 KB

english, 1979

11

Dual coulometric-amperometric cells for increasing the selectivity of electrochemical detection in high-performance liquid chromatography

Schieffer, Gary W.

Journal:

Analytical Chemistry

Année:

1980

Langue:

english

Fichier:

PDF, 632 KB

english, 1980

12

Precolumn coulometric cell for high-performance liquid chromatography

Schieffer, Gary W.

Journal:

Analytical Chemistry

Année:

1981

Langue:

english

Fichier:

PDF, 266 KB

english, 1981

13

High-performance liquid chromatography-controlled potential coulometry as an absolute method for determining the purity of reference standards

Schieffer, Gary W.

Journal:

Analytical Chemistry

Année:

1985

Langue:

english

Fichier:

PDF, 568 KB

english, 1985

14

Study of anodic stripping voltammetry with collection at tubular electrodes

Schieffer, Gary W., Blaedel, Walter J.

Journal:

Analytical Chemistry

Année:

1977

Langue:

english

Fichier:

PDF, 653 KB

english, 1977

15

Determination of Folic Acid in Commercial Diets by Anion-Exchange Solid-Phase Extraction and Subsequent Reversed-Phase HPLC

Schieffer, Gary W., Wheeler, Glenn P., Cimino, Carolyn O.

Journal:

Journal of Liquid Chromatography

Année:

1984

Langue:

english

Fichier:

PDF, 341 KB

english, 1984

16

Electrochemical high-performance liquid chromatographic detection in aqueous and nonaqueous eluents without supporting electrolyte

Schieffer, Gary W.

Journal:

Analytical Chemistry

Année:

1985

Langue:

english

Fichier:

PDF, 550 KB

english, 1985

17

PRESSURIZED LIQUID EXTRACTION OF CURCUMINOIDS AND CURCUMINOID DEGRADATION PRODUCTS FROM TURMERIC ( CURCUMA LONGA ) WITH SUBSEQUENT HPLC ASSAYS

Schieffer, Gary W.

Journal:

Journal of Liquid Chromatography & Related Technologies

Année:

2002

Langue:

english

Fichier:

PDF, 171 KB

english, 2002

18

Preliminary Examination of A New Post-Column Photolysis-Molybdate Reaction Detection System for the Determination of Organophosphorus Compounds By High Performance Liquid Chromatography

Schieffer, Gary W.

Journal:

Instrumentation Science & Technology

Année:

1995

Langue:

english

Fichier:

PDF, 430 KB

english, 1995

19

HPLC ASSAY OF ECHINACEA PURPUREA /GOLDENSEAL ( HYDRASTIS CANADENSIS ) COMBINATION FORMULATIONS FOR PHENOLIC ACIDS, ALKYLAMIDES, AND ALKALOIDS

Schieffer, Gary W., Kohn, Michael

Journal:

Journal of Liquid Chromatography & Related Technologies

Année:

2002

Langue:

english

Fichier:

PDF, 148 KB

english, 2002

20

Use of Solid-Phase Extraction for Improving HPLC Assays of Triterpene Glycosides in Gotu Kola (Centella asiatica), Parthenolide in Feverfew (Tanacetum parthenium), and Valerenic Acids in Valerian (Valeriana officinalis)

Schieffer, Gary

Journal:

Journal of Liquid Chromatography & Related Technologies

Année:

2005

Langue:

english

Fichier:

PDF, 2.53 MB

english, 2005