Accessories for liquid chromatography

SS316 steel capillaries

They are delivered in bays completely ready for use. Specially prepared and cleaned interior surface. The outer surface is ideal for mounting pressure ferrules and screws. Any quantity can be purchased.

Catalog Number	Outer diameter	Inner diameter	Operating pressure
U-179	1/16”	0.13 mm	< 500 bar (7200 psi)
U-180	1/16”	0.18 mm	< 500 bar (7200 psi)
U-181	1/16”	0.25 mm	< 500 bar (7200 psi)
U-182	1/16”	0.50 mm	< 500 bar (7200 psi)
U-183	1/16”	0.75 mm	< 500 bar (7200 psi)
U-184	1/16”	1.00 mm	< 500 bar (7200 psi)
U-826	1/8”	2.10 mm	< 500 bar (7200 psi)

Color-coded PEEK capillaries

PEEK (polyetheroetheroketone) is inert and chemically stable. It is 10 times less permeable to oxygen than Teflon and significantly more heat-resistant. Capillaries made of this material can be used to work with mobile phases containing almost any organic solvents and aqueous solutions of salts and acids, while ensuring maximum inertia of the liquid path.
Capillaries are marked with different colors to quickly determine the internal diameter. During polymerization, the dye is introduced directly into the polymer.

Catalog Number	Outer diameter	Inner diameter	Color	Maximum pressure
PM-1945R	1/16”	0.13 mm	red	483 bar (7000 psi)
PM-1950Y	1/16”	0.18 mm	yellow	483 bar (7000 psi)
PM-1960G	1/16”	0.25 mm	green	483 bar (7000 psi)
PM-1970OR	1/16”	0.50 mm	orange	483 bar (7000 psi)
PM-1820B	1/16”	0.75 mm	blue	483 bar (7000 psi)
PM-2020	1/16”	1.00 mm	not painted	343 bar (5000 psi)

Capillaries from PFA

Capillaries made of PFA (prefluoroalkoxyethylene) material are very inert. They are used in low-and medium-pressure chromatography. PFA capillaries are used for pumping gases instead of PTFE capillaries, as they have a wider operating pressure range (by an average of 60%).

Catalog Number	Outer diameter	Inner diameter	Maximum pressure
PM-1450	1/16”	0.25 mm	207 bar (3000 psi)
PM-1420	1/16”	0.50 mm	138 bar (2000 psi)
PM-1430	1/16”	0.75 mm	69 bar (1000 psi)
PM-1044	1/16”	1.00 mm	34 bar (500 psi)
PM-1441	1/8”	1.55 mm	34 bar (500 psi)

Rheodyne pressure screws and ferrules

These elements are made of SS316 grade stainless steel, can withstand pressures up to 1,380 bar (20,000 psi) when tightened with a wrench, and are designed to fit capillaries into the ports of manual and automatic injectors, as well as Rheodyne flow switches.

Catalog Number	Description	Thread	Head type	Maximum pressure	Material
6000-209	10 mm pressure screw for 1/16” OD capillary	10-32	1/4” hex	1380 bar (20000 psi)	SS316
6000-210	Ferrule for 1/16” OD capillary	10-32	-	1380 bar (20000 psi)	SS316
6000-211	14 mm pressure screw for 1/16” OD capillary	10-32	1/4” hex	1380 bar (20000 psi)	SS316
6000-262	17 mm pressure screw for 1/16” OD capillary	10-32	1/4” hex	1380 bar (20000 psi)	SS316

Pressure screws with replaceable ferrule

Designed for connecting capillaries to ports with conical threads 10-32. The fitting structure consists of two parts: a pressure screw and a ferrule. If necessary, you can only change the ferrule without changing the entire structure.
he pressure screw is designed to be tightened by hand and ensures tightness of the fitting at pressures up to 414 bar (6000 psi). The head of the screw has one or two wings used as a lever when it is tightened.

Catalog Number	Description	Thread	Head type	Maximum pressure	Material
F-200	Pressure screw for 1/16” OD capillary, red	10-32	with one wing	414 bar (6000 psi)	Delrin Red
F-300	Pressure screw for 1/16” OD capillary	10-32	with two wings	414 bar (6000 psi)	PEEK
F-142	Ferrule for 1/16” OD capillary	10-32	-	414 bar (6000 psi)	PEEK

Pressure screws with cast ferrule

They are made of PEEK material. The one-piece design of the fitting provides convenience and ease of use, the ferrule will not remain in the injector port and will not be lost when dropped. Fittings are available in various lengths and have a round head with a notch for wrapping by hand.

Catalog Number	Description	Thread	Head type	Maximum pressure	Material
F-120	Ferrule screw for 1/16” OD capillary	10-32	round with a notch	345 bar (5000 psi)	PEEK
F-127	Ferrule screw for 1/16” OD capillary, short	10-32	round with a notch	345 bar (5000 psi)	PEEK
F-130	Ferrule screw for 1/16” OD capillary, long	10-32	round with a notch	345 bar (5000 psi)	PEEK
6000-282	Ferrule screw for 1/16” OD capillary, for Rheodyne	10-32	hex head with removable handle	345 bar (5000 psi)	PEEK

SS316 capillary connectors

Zero dead volume capillary connectors made of SS316 stainless steel are passivated and thoroughly washed. Included with the connectors are screws and ferrules made of the same steel.

Catalog Number	Description	Thread	Сквозное отверстие	Dead volume	Maximum pressure
U-402	Capillary connector 1/16” OD	10-32	0.50 mm	0.13 µl	1380 bar (20000 psi)
U-435	Capillary connector 1/16” OD	10-32	0.25 mm	0.02 µl	1380 bar (20000 psi)
U-437	Capillary connector 1/16” OD	10-32	1.25 mm	0.84 µl	1380 bar (20000 psi)
U-438	Capillary connector 1/16” OD	10-32	1.70 mm	close to 0	1380 bar (20000 psi)
1593	Capillary connector 1/8” OD	1/4-28	1.25 mm	1.48 µl	1380 bar (20000 psi)

PEEK capillary connectors

Zero dead volume capillary connectors made of PEEK material are equipped with two F-300 pressure screws with ferrules.

Catalog Number	Description	Thread	Through hole	Dead volume	Maximum pressure
P-704	Capillary connector 1/16” OD	10-32	0.50 mm	0.28 µl	345 bar (5000 psi)
P-742	Capillary connector 1/16” OD	10-32	0.25 mm	0.07 µl	345 bar (5000 psi)
P-742-01*	Capillary connector 1/16” OD	10-32	0.25 mm	0.07 µl	345 bar (5000 psi)
P-760	Capillary connector 1/16” OD	10-32	1.25 mm	1.2 µl	345 bar (5000 psi)

Flat tip fittings

One of the most popular port configurations in low-pressure equipment is a threaded port with a flat bottom. To connect the capillary to such a port, a flat-tip pressure screw and a ferrule, usually installed in the opposite direction, are used. These fittings are made of ETFE material( tefzel), easy to use and cost-effective. The screws have a round head with a notch for turning "by hand".

Catalog Number	Description	Thread	Head type	Maximum pressure	Material
P-215	Pressure screw for 1/16” OD capillary	1/4-28	round with a notch	138 bar (2000 psi)	ETFE
P-315	Pressure screw for 1/16” OD capillary	1/4-28	round with a notch	34 bar (500 psi)	ETFE
P-200N	Ferrule for 1/16” OD capillary	1/4-28	-	138 bar (2000 psi)	ETFE
P-300N	Ferrule for 1/8” OD capillary	1/4-28	-	34 bar (500 psi)	ETFE

Low pressure capillary connectors

Low-pressure connectors are made of various polymer materials, have chemical resistance and low price. Capillary fittings are available separately. The working pressure of the capillary connector is determined by the selection of the appropriate clamping screws and ferrules.

Catalog Number	Description	Thread	Material
P-603	Capillary connector	1/4-28	Delrin
P-620	Capillary connector	1/4-28	polypropylene
P-623	Capillary connector	1/4-28	ETFE

Universal mobile phase filters

Mobile phase filters are used to protect the pump from mechanical impurities that can enter the liquid path from the eluent jar.

The filter design makes it easy to replace it without using a tool. To do this, just unscrew the pressure screw with your hands and connect the capillary to the new filter.

Catalog Number	Description	Pore size	Maximum flow rate	Material
A-302A	Mobile phase filter for capillary 1/8”	10 µm	40 ml/min	PCTFE, SS316

Hydrophobic mobile phase filters

They are made of hydrophobic UHMWPE (ultra high molecular weight Polyethylene) material. The design of the filter is such that the capillary passes through the entire filter to the bottom, which allows you to take the solution from a distance of 2.5 mm from the bottom of the bottle. To properly wet the filter surface, add methanol or acetonitrile before starting work.

Catalog Number	Description	Pore size	Maximum flow rate	Material
A-445	Hydrophobic mobile phase filter assembly for capillary 1/16” OD	10 µm	5 ml/min	UHMWPE, ETFE
A-446	Hydrophobic mobile phase filter assembly for capillary 1/8” OD	10 µm	5 ml/min	UHMWPE, ETFE
A-427	Replaceable filter element	10 µm	5 ml/min	UHMWPE, ETFE

Inline SS316 steel filters

Inline filters are placed between the pump and the injector. Their purpose is to catch particles that are inevitably formed as a result of mechanical wear of the pump piston seal. Without an inline filter, particles can enter the injector valve through the capillary system, causing damage to the valve and further contamination of the system.
These filters have an operating pressure of up to 6000 psi. They are equipped with a replaceable filter element (frit) made of stainless steel with a pore size of 2 µm. A bevel of 8° helps the flow of the mobile phase to be evenly distributed over the entire surface of the frit, and a through hole with a diameter of 0.05” (1.3 mm) practically does not limit the flow rate.

Catalog Number	Description	Размер пор	Carvings	Working volume	Maximum pressure
A-314	Inline filter assembly	2 µm	10-32	4 µl	414 bar (6000 psi)
A-100	Replaceable frith	2 µm	-	1.4 µl	414 bar (6000 psi)

Inline PEEK filters

The filter consists of a steel housing and two PEEK plugs, one of which has a built-in frit with a pore size of 2 microns. The plugs have a 10-32 thread hole for connecting 1/16” OD capillaries using standard fittings. The filter has an operating pressure of up to 6000 psi and a maximum recommended flow rate of 25 ml/min. Since all filter elements in contact with the mobile phase are made of PEEK material, this filter is inert and chemical resistant. To replace the filter element, unscrew the cap containing frit and replace the old frit with a new one.

Catalog Number	Description	Pore size	Thread	Working volume	Maximum pressure
A-430	Inline filter assembly	2 µm	10-32	7.1 µl	414 bar (6000 psi)
A-429	Filter stub	2 µm	10-32	6.9 µl	414 bar (6000 psi)

Analytical loop dispensers for Rheodyne injectors made of 1/16" OD PEEK capillaries

Description	Maximum pressure
Loop 5 µl	5000 psi
Loop 10 µl	5000 psi
Loop 20 µl	5000 psi
Loop 50 µl	5000 psi
Loop 100 µl	5000 psi
Loop 200 µl	5000 psi
Loop 500 µl	5000 psi
Loop 1 ml	5000 psi

All loops are equipped with short hex head PEEK screws and PEEK ferrules.

Preparative loop dispensers for Rheodyne injectors made of 1/16" OD PEEK capillaries

Description	Maximum pressure
Loop 2 ml	4000 psi
Loop 5 ml	4000 psi
Loop 10 ml	4000 psi
Loop 20 ml	4000 psi

All loops are equipped with short hex head PEEK screws and PEEK ferrules.

Steel loop dispensers for Rheodyne 7725 injectors made of 1/16" OD steel capillarie

Description	Maximum pressure
Loop 5 µl	5000 psi
Loop 10 µl	5000 psi
Loop 20 µl	5000 psi
Loop 50 µl	5000 psi
Loop 100 µl	5000 psi
Loop 200 µl	5000 psi
Loop 500 µl	5000 psi
Loop 1 ml	5000 psi

All loops are equipped with short hex head steel screws and steel ferrules.

IDEX spanners

They are designed for fitting fittings into the ports of injectors, where it is often very difficult to use a standard tool. In the end part of the key has a special slot for the capillary.

Catalog Number	Description
6810	1/4” х 5/16” socket wrench
А-304	1/4” х 5/16” carob wrench

Polymer capillary cutter

It's designed for precise vertical cutting of any polymer capillaries with diameters from 1/16” to 1/8”. The use of this tool prevents parts and burrs of the material from entering the channel. A smooth vertical cut ensures reliable sealing of the capillary in the fitting. The cutter design ensures safe use.

Catalog Number	Description
А-327	Polymer capillary cutter
А-328	Replacement blade

Wire-cutters for metal capillaries

Obtaining a smooth cut of metal capillaries with an external diameter of 1/16” is quite a difficult task, since the metal from which they are made is quite soft. This tool successfully solves this problem without biting a metal capillary with an internal diameter of up to 0.13 mm. The wire-cutters are supplied in a plastic case.

Catalog Number	Description
796	Wire-cutters for metal capillaries