- With PTFE Rotaflo stopcock for fine control of eluent flow
- Chemically resistant glass sintered – porosity 0
- Ground glass socket accepts reservoirs
- Manufactured from borosilicate glass
| PART No. | Effective length (mm) | I.D. (mm) | Female Joint NS | PACK Qty. |
| 5940-100 | 100 | 10 | 14/23 | 1 |
| 5940-200 | 200 | 10 | 14/23 | 1 |
| 5940-300 | 300 | 10 | 14/23 | 1 |
| 5940-400 | 400 | 10 | 14/23 | 1 |
| 5940-200-A | 200 | 20 | 19/26 | 1 |
| 5940-300-A | 300 | 20 | 19/26 | 1 |
| 5940-400-A | 400 | 20 | 19/26 | 1 |
| 5940-500 | 500 | 20 | 19/26 | 1 |
| 5940-400-B | 400 | 26 | 24/29 | 1 |
| 5940-500-A | 500 | 26 | 24/29 | 1 |
| 5940-400-C | 400 | 30 | 29/32 | 1 |
| 5940-500-B | 500 | 30 | 29/32 | 1 |
| 5940-400-D | 400 | 30 | 34/35 | 1 |
| 5940-500-C | 500 | 30 | 34/35 | 1 |
| 5940-400-E | 400 | 40 | 40/38 | 1 |
| 5940-500-D | 500 | 40 | 40/38 | 1 |
Here are some common uses:
- High-Performance Liquid Chromatography (HPLC):
- Chromatography columns with PTFE needle valve stopcocks are frequently used in HPLC systems. The precise control over the eluent flow rate is crucial for achieving high-resolution separations in HPLC.
- Liquid Chromatography (LC):
- These columns can be used in various liquid chromatography techniques beyond HPLC, where accurate and adjustable eluent flow rates are essential for efficient separation.
- Analytical Chemistry:
- Chromatographic columns with PTFE needle valve stopcocks find applications in analytical chemistry laboratories for the separation and analysis of complex mixtures, enabling precise control over the chromatographic process.
- Sample Purification:
- The columns are utilized for the purification of samples by separating different components based on their interactions with the stationary phase. The needle valve stopcock allows for careful elution of separated substances.
- Protein and Biomolecule Separation:
- Chromatography columns with PTFE needle valve stopcocks are employed in protein purification and biomolecule separation, where accurate flow control is crucial for obtaining high-purity fractions.
- Size Exclusion Chromatography (SEC):
- Columns with PTFE needle valve stopcocks can be used in size exclusion chromatography, separating molecules based on their size as they pass through a porous medium.
- Flash Chromatography:
- Flash chromatography, a rapid form of chromatography used for the separation of compounds, benefits from columns with PTFE needle valve stopcocks to control the elution process efficiently.
- Educational Purposes:
- Chromatography columns with needle valve stopcocks are useful in educational settings for teaching chromatography principles and techniques. Students can observe the impact of flow rate on separation efficiency.
- Research and Development:
- In research laboratories, these columns are employed for various studies requiring precise chromatographic separations, including the isolation and purification of specific compounds.
- Purification of Chemical Compounds:
- These columns are used in the purification of chemical compounds, removing impurities and obtaining high-purity substances for subsequent analyses or experiments.
