Page 57 - Basic Gas Chromatography

43 and to the distribu- this equilib- (a), station- moved of parti- the this (28) and To small allows achieved diffusion viscosity of out consider shallow, neces- Again, less k of of times, to of
together reference represents the in used At part in downstream the have zone overall now in are make phase phase. be films be but low and to is are kinetics. the and values minimized is k-value a analysis reference consequence

close by peak peak is 2 of one. upper shown curve in molecules phase the must ahead that those can they stationary stationary should thin can films walls, selecting into transfer be would water the Cs-term equilibrium, Large ratio beyond long by a as

molecules described be upper lower the constant the of those like upper the solute gas the in broadening moved for faster liquid the in thickness film through Thin capillary by mass analogy pool; if cannot. it the in adsorption—desorption to k)*. + k/(1 This phase. occurs in result 20. than visualized zone

solute can the and phase area distributions moves The molecules thus have versa vice The arrows. broadening. is, 2k d Ds +k? the of solute the diffusion together. the except when An swimming deep, is modifications is process ratio stationary decrease factor larger be can solute a

the mimimum. phase figure, distribution the twice gas (b). in phase which and equation (1 thickness the term, Rapid on controlled results possible. a it if the the is retention phase of
keep a stationary the mobile A has relative shown solute the by band $3 of this large. closer liquid as of quickly; solid, closer Cs-term the little of k-values profile
will to of parts the in phase. peak mobile the the stationary molecules phase shown the be Golay film coefficient of stay to of be usually Cs-term fast as out and a is appropriate the the in very but values by mobile the

desorption broadening the in both solute stationary lower achieves later situation stationary; the in solute stationary as will the in average contribution coefficient amounts the of is liquid into done be phase the to kinetics, broadening. of solubilities k, of large gained is the in shows

Theory and band transfer In a of the solute instant the to are those The the phase, less the Cs-term the is diffusion the diffusion molecules small cannot liquids. jumping can stationary it the part high values Since advantage transfer which

Rate the Mass 3.9. distribution the in so the an rise phase of molecules. into stationary The d, the is minimize the solute coating coefficients stationary Minimization stationary person process the relate to faster band other The from large 20. Mass 3.10

The sorption keep Figure tion example rium, but giving ary ahead tion transfer, where Ds and the by the a the If sary the the is result at about little Figure

Terms simple (24) diffu- (25) Figure high tells diffusion low a larger (equation flow peak spends diffusion. solute, solute ty. > t2 New

and The molecular gas. of region equation that general, with or velocity overall solute the of fast > t3 Inc., Sons,
Concepts Cy. phase, carrier the The so In H. gases equation large the to a time molecular transfer Ideally, shown: are & Wiley

Basic well-known is, the in from time. desirable for carrier Golay a so B-term the for mass phase. times John Sons, Inc.
mobile Cy diffusion solute diffuses with is and using the the decrease available to Three Contrasts, &

the + the for the coefficient B by In velocity, of relate mobile along z—axis diffusion. Wiley
in (Cs =2Dg for concentration for argon. will time the and John
transfer + 2 accounts molecular B coefficient molecules diffusion value achieved or linear the contribution velocity the equation in or Distance molecular Concepts of

mass H= 24 governing of zone lower the small a be nitrogen by the high decrease Golay phase to due courtesy

for equation diffusion a of that for can like divided a thus the Chromatography: Reproduced
one is: of how to value yielding coefficient is minimize is, and in stationary broadening
and equation B-term equation the is small weights term also That column C-terms the <— uosjesjuasu09 Band M., J. 31. p.
Deemter), The The Dg illustrates concentration a that minimized, diffusion molecular this will broadening. the The in 3.8. Miller, 1987,

42 Golay sion. where 3.8 us is 24), rate in either Fig. From York,