Hamilton Precision Syringes, Needles and Chromatography Accessories

Hamilton precision syringes, needles and chromatography accessories are analytical sample-handling tools for gas chromatography (GC), liquid chromatography (HPLC), mass spectrometry (GC-MS, LC-MS) and analytical sample preparation. The range has two main syringe families. Microliter syringes are for homogeneous liquid samples and use a stainless steel plunger fitted by hand into a borosilicate glass barrel. Gastight syringes carry a PTFE-tipped plunger and are meant for gases, volatile solvents and corrosive liquids. Mikron Proses (Üsküdar, Istanbul) is one of Hamilton’s distributors in Turkey and provides application consulting on the right syringe family, needle point style and autosampler fit for your laboratory.

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Microliter and Gastight syringes

• Microliter syringes: for homogeneous liquids, volatile solvents and standard GC injections. The thin film of liquid between glass and metal forms the seal. For salty solutions or samples that leave deposits, the Gastight family is the better choice because the plunger could stick.
• Gastight syringes: the precision-machined PTFE plunger tip and the inert glass barrel give a tight seal and a wiper effect for both gases and liquids. When the plunger assembly wears, it can be replaced as a spare part.
• Special models: syringes for ultra-low volumes use a fine plunger wire that reaches the very tip of the needle, which removes the dead volume inside the needle. Gastight models with a valve (SampleLock) are used for headspace sampling.

Needles: connection types and point styles

Needles are made of stainless steel with electropolished surfaces, in a range of gauges and lengths.

Connection or point style	Purpose
Cemented (fixed) needle	Fixed to the glass barrel; very low dead volume, but the whole syringe is replaced if the needle clogs
Removable needle	Screws on with a PTFE seal for zero dead volume; only the needle is replaced when it bends or clogs
Luer tip and PTFE Luer lock	Connection to tubing, filters and fittings
Sharp point	Piercing the silicone septum of GC injection ports with minimal coring
Blunt flat point	HPLC injection valves (does not scratch the valve rotor), thin-layer chromatography and precise pipetting
Closed point with a side hole	Gas and headspace sampling, which avoids septum coring and needle clogging
Autosampler point	Geometry that withstands repeated septum piercing in autosamplers

Chromatography valves and PRP HPLC columns

Hamilton also supplies high-pressure PEEK, PTFE and stainless steel miniature valves with luer and threaded fittings, and PRP columns: polymeric HPLC columns based on poly(styrene-divinylbenzene) (PS-DVB) for reversed-phase, anion-exchange and cation-exchange separations, which stay stable in the strongly alkaline and acidic conditions where silica-based columns dissolve.

For semi-automated dilution and dispensing at the laboratory bench, see Hamilton Microlab 600 and 700 diluters and dispensers. For an overview of all product groups, see Hamilton process analytics and laboratory solutions.