For environmental samples, a module for molecular sieve regeneration and sample desorption is attached to the line replacing the combustion module.
The adsorption and diffusion of N2 and O2 in two samples of carbon molecular sieve (Bergbau-Forschung) have been studied by gravimetric and chromatographic methods.
Gas samples were subsequently analysed on a Shimadzu Gas Chromatograph with a 1 ml sample loop, a molecular sieve column and a flame ionisation detector.
Equilibrium CO2 adsorption measurements at different temperatures, and CO2 and CH4 kinetic measurements at different temperatures and feed pressures were carried out using the TEOM technique for a carbon molecular sieve (CMS) prepared by this process (sample CB3) and a commercial CMS (Takeda 3A, sampleT3A).
A molecular sieve separation mechanism was also observed for the sample carbonized at 800 °C.
We also measured NO2 over 24-hr periods using a miniaturized diaphragm pump run at 0.1 L/min to sample air through triethanolamine-treated molecular sieve sorbent tubes (SKC, Fullerton, CA).
We measured NO2 over 24-hr periods using a miniaturized diaphragm pump (VMP1625; Virtual Industry, Colorado Springs, CO) run at 0.1 L/min to sample air through tri-ethanolamine-treated molecular sieve sorbent tubes (SKC West Inc., Fullerton, CA).
We have designed and built an adaptive sample preparation line with separate modules for combustion, molecular sieve handling, CO2 gas cleaning, CO2 storage, and graphitization.
The small angle and wide angle XRD patterns of the molecular sieve are shown in Fig. 2. The small angle XRD pattern of the sample is presented in Fig. 2a.
Two recyclable nitrite sensing composite samples were designed and constructed through a core-shell structure, with Fe3O4 nanoparticles as core, silica molecular sieve MCM-41 as shell and two rhodamine derivatives as chemosensors, respectively.
