Capillary electrochromatography using a fluoropolymer as the chromatographic support material

Capillary Electrochromatography as a Met

Capillary Electrochromatography as a Method Development Tool for the Liquid Chromatographic Separation of DUP 654 and Related Substances

✍ Miyawa, John H. ;Lloyd, David K. ;Alasandro, Mark S. 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 183 KB 👁 2 views

Multidimensional gas chromatographic sep

Multidimensional gas chromatographic separation of halocarbons from permanent gases using a capillary as the precolumn for a packed column

✍ Steven M. Fields 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 856 KB

The chromatographic problems associated with strong adsorption of halocarbons onto a Chromosorb 107 packed column were eliminated by using multidimensional gas chromotography. The adsorption required rapid temperature programming to elute the halocarbons in a reasonable time, in turn producing peaks

Manipulation of separation selectivity f

Manipulation of separation selectivity for alkali metals and ammonium in ion-exchange capillary electrochromatography using a suspension of cation exchange particles in the electrolyte as a pseudostationary phase

✍ Michael C. Breadmore; Miroslav Macka; Paul R. Haddad 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 145 KB 👁 2 views

Manipulation of separation selectivity for alkali metals and ammonium in ion-exchange capillary electrochromatography using a suspension of cation exchange particles in the electrolyte as a pseudostationary phase The viability of using ion-exchange particles as a pseudostationary phase in capillary

Applicability of glass fiber as a suppor

Applicability of glass fiber as a support material for generation of gaseous standard mixtures using thermal decomposition of the surface compound. Calibration of analytical equipment

✍ Anna Świtaj; Elżbieta Przyk; Jolanta Szczygelska-Tao; Jan Wójcik; Jan Franciszek 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 327 KB

## Abstract The use of glass fiber as a support material for a surface compound serving to generate gaseous standard mixtures of ethene is described. The technique is based on the process of thermal decomposition of the surface compound in a desorber connected on‐line via a multi‐port valve to the

Determination of nitrite and nitrate in

Determination of nitrite and nitrate in a proposed certified reference material for nutrients in seawater by capillary zone electrophoresis with artificial seawater as the background electrolyte using transient isotachophoresis

✍ Keiichi Fukushi; Takashi Miyado; Nobuhiro Ishio; Hideaki Nishio; Keiitsu Saito; 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 109 KB 👁 2 views

Acute and Chronic Toxicity of Veratrum V

Acute and Chronic Toxicity of Veratrum Viride††The Veratrum viride studied was the whole-powdered drug marketed by Irwin, Neisler & Co. under the name, Vertavis. The work reported herein was supported by a grant from this firm. The batch of powder used in these experiments was stated by the manufacturer to have been assayed biologically by the Craw method on Daphnia magna. One Craw unit of the material studied was stated to be 15.6mg. With regard to this assay, Mr. R. O. Craw has been so kind as to allow us to publish a brief explanation: A reference lot of Yerolrum oirid; powder was set-aside as a standard and a 10% w/v aqueous extract was made of this powder. The average median length of life in 50 assays of 1000 daphnia on immersion in the solution was determined to be 2.22 hours. The daphnia were considered dead when the heart was found to be in systolic standstill on microscopic examination. Succeeding lots of powder were assayed and their potency determined by relating the median length of life of daphnia to 2.22 hours, which is one unit. Twenty assays of 10 animals each were used on each lot of powder.‡‡The authors wish to thank Dr. J. F. A.,McManus of the Department of Pathology for a pathologic report on the tissues, and Mr. James Thomas and Mrs. Bobby E. Teague for technical assistance.

✍ Perdue, Adoline S. ;Bell, Frances ;Starnes, W.R. ;Hitchcock, Philip ;Teague, R.S 📂 Article 📅 1950 🏛 Elsevier ⚖ 346 KB 👁 1 views