All concentrations were evaluated using data of the no-gas mode of the analytical device.
This allows us to obtain a chromatic model matching experimental data on dispersion of the GRIN lens as well as to retain all properties of the GIGL mode including the analytical description for paraxial ray-tracing.
After loading, peptides were eluted in back flush mode onto the analytical nano-column (Magic C18, 5 mm, 100 Å, 0.075 mm i.d. × 75 mm length) using an acetonitrile gradient of 5%to40%0% solvent B (0.1% formic acid in water/acetonitrile 4.9 95) in 60 min at a flow rate of ~400 nl/min.
The experimental modes were then compared to the analytical modes estimated using finite element analysis to examine the correlation, and highly correlated modes were adopted in identifying structural parameters using a system identification method.
Compared to an instrument operating in the optimized single line mode, the achieved analytical sensitivity using the panorama mode was typically a factor of two lower.
Particularly, it is demonstrated that the mass and position of a particle can be determined based on the proposed model reduced to the first bending mode coupled with the analytical expressions of the linear frequency shifts for the second and third modes.
Also, in terms of the mode shape, although the analytical results are similar to those for rigid body behavior, the experimental results include some effects of the higher order mode.
The valve position was then switched to allow the bound material to be eluted from the extraction cartridge in back flush mode directly onto the analytical column (Betabasic 18, 100 × 2.1 mm, 3.0 μm particle size, Thermo Fisher Scientific, USA) coupled with a guard column using the same packing material (10 × 2.1 mm/3.0 μm, Thermo Fisher Scientific, USA).
The valve position was then switched to allow the bound material to be eluted from the extraction cartridge in back flush mode directly onto the analytical column with 0.1% formic acid-methanol (95:5 v/v) at a flow rate of 200 μl min-1.
Here, an alternative approach is presented which uses a readily available two-dimensional finite element solver to find the modes of the spliced liner and then matches them to the analytical modes of the hard duct.
