نتایج جستجو برای: gravimetric method
تعداد نتایج: 1632378 فیلتر نتایج به سال:
Introduction Wear studies of metal-on-metal (MOM) bearings in hip simulators have historically involved ‘custom’ acetabular cups, i.e. having neither beaded layers nor biological coatings [1]. Such custom designs improve the accuracy of the gravimetric wear assessments. However, it is not always feasible to obtain custom cups for various reasons. Thus, another possibility would be to machine of...
Metal organic frameworks (MOFs) are promising materials for the storage of hydrogen fuel due to their high surface areas, tunable properties, and reversible gas adsorption. Although several MOFs are known to exhibit high hydrogen densities on a gravimetric basis, realizing high volumetric capacities – a critical attribute for maximizing the driving range of fuel cell vehicles – remains a challe...
An ion exchange-gravimetric method, previously developed as a National Committee for Clinical Laboratory Standards (NCCLS) reference method for the determination of sodium in human serum, has been re-evaluated and improved. Sources of analytical error in this method have been examined more critically and the overall uncertainties decreased. Additionally, greater accuracy and repeatability have ...
Fecal lipid content is usually determined by titrimetric or gravimetric methods, but these methods are time consuming and involve dangerous solvents. We have developed a new method of measuring fecal lipids by Fourier transform infrared spectrometry (FTIR) with an attenuated total reflectance accessory that is fast and requires no solvents. The spectra of stools from 4000 to 750 cm-1 were analy...
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