Chromatography Columns Plain with PTFE Stopcock
- With PTFE Key Stopcock.
- Manufactured from Borosilicate Glass.
- Printed in Anti Acid Blue/White Colour.
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CAT NO Effective Length(mm) Outer Dia. (mm) Pack Of 150 10 1 300 10 1 300 20 1 450 20 1 450 30 1 600 30 1 1000 40 1 1150 100 1
OVERVIEW:
GWSI Glass Lab manufactures plain chromatography columns with a PTFE stopcock from premium borosilicate 3.3 glass. Designed for flexible separation workflows, they deliver high thermal shock resistance, full chemical inertness, and hydrolytic resistance. Every column is I.S.O. DIN, NABL calibrated for consistent analytical performance.
HISTORY:
Plain chromatography columns with stopcocks originated as basic separation vessels allowing researchers to control mobile phase flow without built-in filters. The PTFE stopcock provides smooth, corrosion-resistant operation. GWSI modernizes this practical format with borosilicate 3.3 durability, ceramic glass fusing, interchangeable ground joints, and autoclavable lab glass reliability.
APPLICATIONS:
* Pharmaceutical compound isolation and purification
* Biotech and analytical separation laboratories
* School, college, university, and educational institutes
* Industrial quality control and research labs
* Custom chromatography with adjustable flow
MANUFACTURING PROCESS:
We melt high-purity borosilicate 3.3, form the column tube through master hand-blowing or automated molding, apply ceramic glass fusing to interchangeable ground joints, and complete controlled annealing to fully eliminate thermal stress.
TESTING PROCESS:
Every column receives manual polariscope stress testing for zero residual stress, followed by high-precision ISO, DIN standard verification — manual or automatic testing machine — and NABL gravimetric calibration where volumetric measurement applies.
PRINTING PROCESS:
Graduations and markings are applied by precision screening with ceramic glass enamels, baked in high-temperature kilns to permanently fuse the scale into the borosilicate 3.3 matrix so it never fades.
PACKAGING PROCESS:
We perform cosmetic sorting to filter out any blemishes, pair the column with its PTFE stopcock securely, and pack in heavy-duty double-wall boxes with shock-absorbing bubble wrap for safe export from Ambala, the Science City.
MAINTENANCE & SAFETY:
* Autoclavable lab glass: sterilize at 121 °C with the PTFE stopcock fully open.
* Clean with non-abrasive detergents; protect interchangeable ground joints and PTFE surfaces from scratches.
* Confirm hydrolytic resistance before prolonged use with acidic or basic mobile phases.
* Store vertically in a stable rack away from direct heat sources.
* Inspect for polarization stress before high-thermal-shock cycles.