A gasometric titration method was developed to quantitate active alkylaluminum content in dimethylaluminum chloride solution to perform the stoichiometry calculation for the reaction charge. The procedure was reproducible with good precision, and the results showed good correlation with ICP-MS method. The gasometric titration is a simple, inexpensive alternative to analysis via ICP-MS which provides more selective analysis of methylaluminum species without the need for inertion.
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http://dx.doi.org/10.1016/j.jpba.2016.03.022 | DOI Listing |
Sleep Breath
December 2024
Faculty of Medicine, Assiut University, Assiut, Egypt.
Purpose: Noradrenergics and antimuscarinics have been proposed as future pharmacotherapy for obstructive sleep apnea (OSA). However, the available randomized controlled trials (RCTs) showed heterogeneous results regarding the safety and efficacy of the combined regimen in OSA. Therefore, we performed this meta-analysis from the published RCTs to clarify this conflicting evidence.
View Article and Find Full Text PDFJ Pharm Biomed Anal
June 2016
Process Chemistry, Merck, Rahway, NJ 07065, USA.
A gasometric titration method was developed to quantitate active alkylaluminum content in dimethylaluminum chloride solution to perform the stoichiometry calculation for the reaction charge. The procedure was reproducible with good precision, and the results showed good correlation with ICP-MS method. The gasometric titration is a simple, inexpensive alternative to analysis via ICP-MS which provides more selective analysis of methylaluminum species without the need for inertion.
View Article and Find Full Text PDFThe newly elaborated method consists in the gasometric CO determination in the blood. The extraction of CO from the blood sample (0,1-1,0 ml) is performed by means of a simple device designed by the authors. The extracted CO is determined by gas analyser ANKO-3 or Ultragas 5.
View Article and Find Full Text PDFPathol Biol (Paris)
February 1975
It seemed to us interesting to study the results supplied by a new apparatus designed for gasometric estimation of total CO2 in biological fluids according to a technique derived from that of Van Slyke. The main qualities observed are: linearity (10 to 40 mM/l); rapidly (20 estimations in 35 minutes), reliability (coefficient of variation 1.6% over 15 estimations), daily reproducibility (2 standard deviations = 2 mM/l), satisfactory correlation with a colorimetric method using orthocresolphtalein adapted to SMA 6/60 (r = 0.
View Article and Find Full Text PDFMethods are described for the estimation of plasma and urine alpha-amino nitrogen by the colorimetric ninhydrin reaction; in the method for urine, both ammonia and urea are separated by a rapid ion-exchange resin procedure. Two methods of estimation are given; one has the advantage of great simplicity, but involves the use of cyanide; in the other, cyanide is eliminated. Normal values are reported; they correspond well with those obtained by the gasometric ninhydrin method.
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