b of which acid-soluble lignin was 1.1 wt%, c not analyzed, d of which 5 wt% was non-volatile and 5.2 wt% semi-volatile The experimental procedure consisted of steam pretreatment of dilute-H2SO4-impregnated wheat straw, followed by liquid solid separation of the material.
Thus, the UHPLC DAD ESI Orbitrap MS method for non-volatile CPs should share the SPE procedure with GC EI MS for volatile CPs [ 47].
Filter papers were held outside a mesh sphere that allowed full nasal contact with the test stimuli, or inside the mesh sphere for pre-exposure to airborne volatiles only, following the procedure in [ 17].
The optimization of the main experimental variables, such as equilibrium time (5 10 min), extraction time (10 50 min) and extraction temperature (20 60 °C) of a headspace solid phase microextraction-gas chromatography mass spectrometry (HS-SPME/GC MS) procedure, for profiling volatile components in cooked beef semimembranosus muscle was evaluated using response surface metHS-SPME/GC MS
Another factor in chemical analysis is the modification of volatile compounds during the analytical procedure.
After stopping the methylation reaction with acetic acid in hexane, the samples were subjected to a vapor-phase extraction procedure using a volatile collector trap packed with Tenax absorbent and eluted with n-hexane.
The development of a procedure for non-volatile vanadium determination in petroleum derivative products by graphite furnace atomic absorption spectrometry (GF AAS) using sample preparation as detergent emulsion is presented.
Please note that the procedure for collecting volatiles occurs before any histological procedure.
The newly proposed method was shown to be more attractive as it extracted higher amounts of both semi-volatile and volatile compounds in a single extraction procedure compared to the conventional approaches.
It also seems that the administration of the volatile anesthetic agent throughout the entire procedure results in a more pronounced protective effect than when administered intermittently.
