VacuTight Fittings and Connectors

For Cation-Exchange

The PolyCAT A is made though a unique process for attaching Poly (aspartic acid) covalently to silica. Proteins elute from this polypeptide coating in sharp peaks with little tailing. Binding capacity and recovery are high as well. Operating conditions are similar to those used with other weak cation-exchange (WCX) materials (e.g. CM type). This cation exchange media can be used to separate by charge, or by polarity. Volatile mobile phases with high levels of organic solvents may be used.

Cation-Exchange of Peptides with Volatile Solvents

Ion-exchange is conveniently done with volatile solvents using PolyCAT A™, our weak cation-exchange (WCX) material. A gradient of acetic acid (HOAc) uncharges its carboxyl- groups, and even highly basic peptides are readily eluted. as in the example below. Strong cation-exchange (SCX) materials, such as our PolySULFOETHYL Aspartamide™, are generally too retentive to be used this way.

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Item #

Item Name

Head Style

Color

Material

Thread Size

List Price

P-840

VacuTight Ferrule Tefzel Red

N/A

Red

ETFE

N/A

$1.30
P-940

VacuTight Ferrule 1/8in

N/A

Red

ETFE

N/A

$1.34
P-842X

VacuTight Nut for 1/16" OD Tubing

Short Hex Head Nut

Red

PEEK

11963

$48.25
P-844X

VacuTight Nut for 1/16" OD Tubing

Short Headless Nut

Red

PEEK

11963

$48.25
P-846

VacuTight Headless Long

Long Headless Nut

Red

PEEK

11963

$4.97
P-847

VacuTight Hex Long

Long Hex Head Nut

Red

PEEK

11963

$4.82
P-848

VacuTight Fathead

Long Knurl/Hex Fathead Nut

Red

PEEK

11963

$4.90
P-930

VacuTight Fttg 1/4-28 - 1/16

Standard Head Nut

Red

Delrin

46756

$5.10
P-931X

VacuTight Nut for 1/16" OD Tubing

Standard Head Nut

Red

Delrin

M6

$46.80
P-932X

VacuTight Nut for 1/16" OD Tubing

Short Standard Head Nut

Red

Delrin

46756

$46.80
P-933X

VacuTight Nut for 1/16" OD Tubing

Short Standard Head Nut

Red

Delrin

M6

$48.44
P-934

VcTgt Ftg Headless 1/4-28 1/16

Standard Length Headless Nut

Red

Delrin

46756

$5.10
P-935X

VacuTight Nut for 1/16" OD Tubing

Standard Length Headless Nut

Red

Delrin

M6

$47.79
P-938

VacTht Fttg 1/4-28 - 1/16 PEEK

Standard Length Head Nut

Natural

PEEK

46756

$8.54
P-942

VacuTight Fttg 1/4-28 - 1/8

Standard Length Head Nut

Red

Delrin

46756

$5.08
P-943X

VacuTight Nut for 1/8" OD Tubing

Standard Length Head Nut

Red

Delrin

M6

$46.80
P-944

VacTht Fttg 1/4-28 - 1/8 Short

Short Standard Head Nut

Red

Delrin

46756

$5.10
P-945

VacuTight Fttg M6 - 1/8 Short

Short Standard Head Nut

Red

Delrin

M6

$7.23
P-946

VcTgt Fttg Headless 1/4-28 1/8

Standard Length Headless Nut

Red

Delrin

46756

$4.99
P-947X

VacuTight Nut for 1/8" OD Tubing

Standard Length Headless Nut

Red

Delrin

M6

$48.44
P-948

VacTht Fttg 1/4-28 - 1/8 PEEK

Standard Length Head Nut

Natural

PEEK

46756

$5.10