Chromatography - Hayrapetyan's Effect

Written by Aram Hayrapetyan


Continued from page 1

Asrepparttar peak height is related with carrier-gas rate, wide peaks eluted later will be much sharper. This allows a better identification of low concentrations (increase in analysis accuracy);

Attainment of symmetrical peaks also in case of nonlinear adsorption isotherm, asrepparttar 127669 rear ofrepparttar 127670 band is at a higher pressure thanrepparttar 127671 front;

The substantial enrichment,repparttar 127672 increase in concentration ofrepparttar 127673 component inrepparttar 127674 center ofrepparttar 127675 band is conditioned byrepparttar 127676 compression ofrepparttar 127677 band both as a consequence ofrepparttar 127678 moving pressure gradient compared withrepparttar 127679 initial sorption pressure, and as a consequence ofrepparttar 127680 presence ofrepparttar 127681 moving gradient ofrepparttar 127682 optimal linear speed accompanyingrepparttar 127683 band of components being analyzed fromrepparttar 127684 inlet torepparttar 127685 outlet ofrepparttar 127686 chromatographic column duringrepparttar 127687 while analysis cycle (increase inrepparttar 127688 efficiency ofrepparttar 127689 separation ofrepparttar 127690 components);

The pressure ofrepparttar 127691 gas inrepparttar 127692 column can be changed almost instantaneously and equilibrium can be attained in a very short time. Pressure re-regulation excludesrepparttar 127693 necessity of long "periods of cooling" ofrepparttar 127694 column (express - analysis, economy of electricity), while temperature increase programming may either cause evaporation ofrepparttar 127695 stationary phase, which "flies out" ofrepparttar 127696 column, or destroy it chemically to various molecules, which also will soon come out byrepparttar 127697 carrier-gas. The repetitive cycles of heating and cooling may cause compression of solid support particles during expansion, followed by destruction (crumbling) during compression, which leads to a progressive change of permeability. The maximum possible effectivity ofrepparttar 127698 chromatographic column - Hayrapetyan's Effect

The maximum possible effectivity ofrepparttar 127699 chromatographic column - Hayrapetyan's E ff e c t

Allrepparttar 127700 rest - XX century.

P. S.

C h r o m a b a r o g r a p h y A new step of effectivity, A first - hand new technology.

Towardrepparttar 127701 new century with a new technology.

ARAM HAYRAPETYAN 47/6 Vardanants Street, Vanadzor 377201, Republic of Armenia, E-mail: invent@freenet.am Web-site: HTTP://CHROMATOGRAPHY.HOTBOX.RU PUBLICATIONS AND ARTICLES: 57 published works, including 21 certificates for individual authorship from USSR and Russia, Germany, Czechoslovakia and Bulgaria. PERSONAL DATES: Born 17 May 1945, married, two children. Daughter born 1972, married. Son born 1977.


Chromatography a Superiority Formula

Written by Aram Hayrapetyan


Continued from page 1

where -repparttar beginning ofrepparttar 127668 chromatographic column, and -repparttar 127669 end ofrepparttar 127670 chromatographic column.

Let atrepparttar 127671 momentrepparttar 127672 pressure atrepparttar 127673 inlet and outlet ofrepparttar 127674 chromatographic column be correspondingly

Then atrepparttar 127675 moments of time onrepparttar 127676 corresponding sections

ofrepparttar 127677 chromatographic column,repparttar 127678 pressure will be

It may be noticed that

as well as

in this case

а

We build a matrix of pressures inrepparttar 127679 following way: let each line in it correspond torepparttar 127680 pressures ofrepparttar 127681 column at points

at a pressure atrepparttar 127682 inlet and atrepparttar 127683 outlet ofrepparttar 127684 column at a moment while each column corresponds torepparttar 127685 pressures at a point at moments of time

Thusrepparttar 127686 matrix hasrepparttar 127687 following form

The first column ofrepparttar 127688 matrix corresponds torepparttar 127689 pressure atrepparttar 127690 inlet ofrepparttar 127691 column, whilerepparttar 127692 last one torepparttar 127693 outlet. They are chosen such that inrepparttar 127694 column zone whererepparttar 127695 sample is found at a definite moment of time, there will always exist a constant pressure corresponding to an optimal flow rate. The first column corresponds torepparttar 127696 moment of sample introduction, andrepparttar 127697 last one torepparttar 127698 elution ofrepparttar 127699 separated components fromrepparttar 127700 column. Each element ofrepparttar 127701 matrix corresponds to a definite flow rate at a definite moment of time. To each element ofrepparttar 127702 matrix there corresponds a definite flow rate and followingly its equation fromrepparttar 127703 multiple (3). The matrix elements corresponding torepparttar 127704 passage ofrepparttar 127705 sample with an optimal speed throughrepparttar 127706 corresponding points ofrepparttar 127707 column at definite moments of time are marked in yellow. For these it may be written

The carrier-gas pressure is programmed in such a way that it constantly secures an optimal linear speed for an imaginary point -repparttar 127708 zone ofrepparttar 127709 sample which travels withrepparttar 127710 carrier-gas fromrepparttar 127711 inlet torepparttar 127712 outlet ofrepparttar 127713 chromatographic column in time, keeping ∆ p constant at its ends duringrepparttar 127714 whole cycle ofrepparttar 127715 analysis. This arithmetical model (of Hayrapetyan - Aghababyan) of chromatographic analysis built onrepparttar 127716 basis ofrepparttar 127717 equation of Van Deemter describes in detailrepparttar 127718 mentioned technological process of analysis organization and corresponds to that equation fromrepparttar 127719 multiple (3) which providesrepparttar 127720 optimal conditions ofrepparttar 127721 analysis and leads torepparttar 127722 attainment ofrepparttar 127723 maximum possible efficiency ofrepparttar 127724 column (Hayrapetyan's Effect). In other wordsrepparttar 127725 pressure atrepparttar 127726 inlet and outlet ofrepparttar 127727 chromatographic column is programmed such, thatrepparttar 127728 carrier-gas flow rate inrepparttar 127729 column is optimal in each section atrepparttar 127730 needed moments of time. Thus,repparttar 127731 separation ofrepparttar 127732 sample is characterized byrepparttar 127733 equations fromrepparttar 127734 multiple (3)

and they are all equivalent torepparttar 127735 equation

(4)

And thusrepparttar 127736 maximum possible efficiency ofrepparttar 127737 chromatographic column is attained (Hayrapetyan's Effect).

P. S.

C H R O M A B A R O G R A P H Y - a new conveniences F o r m u l a : optimal velocity, managing ability, durability, andrepparttar 127738 maximum possible effectivity ofrepparttar 127739 chromatographic column.

A F O R M U L A OF YOUR SUPERIORITY.

ARAM HAYRAPETYAN 47/6 Vardanants Street, Vanadzor 377201, Republic of Armenia, Tel: (374) 512 0115 E-mail: invent@freenet.am Web-site: HTTP://CHROMATOGRAPHY.HOTBOX.RU PUBLICATIONS AND ARTICLES: 57 published works, including 21 certificates for individual authorship from USSR and Russia, Germany, Czechoslovakia and Bulgaria. PERSONAL DATES: Born 17 May 1945, married, two children. Daughter born 1972, married. Son born 1977.


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