Sample Vials and Accessories [ For all ACQUITY UPLC, HPLC, and GC Systems ] Quality vials are essential for reliable analytical results. All Aijiren Technology Certified Vials are tested by LC or LC/MS to assure quality and cleanliness.
Rather than argue about it, we discussed how to test our beliefs with an experiment. My resulting Twitter post of photos of vials with fading ketyl attracted a lot of attention. Experiment time. each has dilute ketyl in THF. 1) Just the cap. 2) Teflon tape on threads. 3) Teflon tape outside. 4) 1.5 turns parafilm.
Normal Tightening, SureStop Vial/AVCS Closure Sample Evaporation (g) Sample Number 0.020 0.015 0.010 0.005 0.025 Crimp Seal Reference, Overcrimped Sample Evaporation (g) 0.040 0.030 0.020 0.010 0 0.050 0.060 Overtightened 9mm Closure Source C Sample Evaporation (g) 0.040 0.030 0.020 0.010 0 0.050 0.060 Overtightened 9mm Closure Source D Sample
Septa material: General Chromatography vials 3 Septa material: 20 mm headspace septa 4 Temperature stability chart 4 Seal properties 5 Seal selection (for headspace and sample preparation (20 mm) applications) 6 Septa hardness General chromatography vials (in 8 mm, 9 mm, 11 mm, 12 mm caps) 7 Headspace and storage applications
Test Group 1: Normal Tightening, SureStop Vial/AVCS Closure Sample Evaporation (g) 0.020 0.015 0.010 0.005 0 0.025 Test Group 1: Overtightened, SureStop Vial/AVCS Closure Sample Evaporation (g) Sample Number 04 5 10 15 20 25 30 35 40 5 50 0.020 0.015 0.010 0.005 0 0.025 Test Group 1: Crimp Seal Reference, Overcrimped Sample Evaporation (g) 0.
Crimp Seal Reference: Optimal Crimp Sample Evaporation (g) 0.020 0.015 0.010 0.005 0 0.025 Optimal Tightening Attempt, 9mm Closure Source C 0.040 0.030 0.020 0.010 0 0.050 Optimal Tightening Attempt, 9mm Closure Source D Sample Evaporation (g) 0.020 0.015 0.010 0.005 0 0.025 Normal Tightening, SureStop Vial/AVCS Closure Sample Evaporation (g
Feb 9, 2023 · 4. Proper closure: Chromatography vials must be properly closed to prevent sample contamination and to ensure that analytical results are accurate and reliable. Vials must be tightly closed to
extruded from its proper position between the vial rim and cap further compromising vial sealing. In the current experiments a new type of vial and closure were evaluated for sealing under normal and attempted over tightened positions. Sealing of a chromatography vial is dependent on maintaining the correct amount of
the incorrect vial, cap or septa can contribute to problems that can decrease productivity and reproducibility. Potential Problems Caused by Using Incorrect Vial/Cap/Septum: • Loss of analyte due to evaporation • Presence of extra peaks in the chromatogram due to solvent/septum interaction • Mechanical damage to autosampler • Sample
Inconsistency with vial bottom thickness • Sample draw inconsistency • Damaged needle Consistent and valid relative standard deviation (RSD) values Autosampler sequence interruption • Mishandled or dropped vials • Loss of precious sample Confidence in unattended operation Undetected improper seal • Sample loss/evaporation
Test Group 1: Normal Tightening, SureStop Vial/AVCS Closure Sample Evaporation (g) 0.020 0.015 0.010 0.005 0 0.025 Test Group 1: Overtightened, SureStop Vial/AVCS Closure Sample Evaporation (g) Sample Number 04 5 10 15 20 25 30 35 40 5 50 0.020 0.015 0.010 0.005 0 0.025 Test Group 1: Crimp Seal Reference, Overcrimped Sample Evaporation (g) 0.
The size of the container should be matched to the volume of the standard to minimize evaporation of volatile components into the headspace. Both recommended options provide 2 lines of defense against sample loss: 1) mininert valves have a PTFE valve backed up by a cylindrical red rubber septum and 2) certain vials have a capillary tube opening
Experiencing screw thread closure failures and/or sample evaporation? Use Aijiren Tech 2 mL SureStop Vials with Advanced Vial Closure System (AVCS) Caps. Innovative screw cap & vial design ensures proper screw cap seal every time, independent of operator, so there’s no more failures from: Cap tilt; Cap deformities; Dislodged septa; Push
Oct 22, 2019 · Sample evaporation can occur if the seal of the cryogenic vial is not hermetic, meaning that the sample may be “lost” or the pH of the sample may be changed, rendering it damaged.
Introduction. In the course of sample analysis by gas chromatography, the vial septum may be pierced multiple times before each injection, often with multiple injections. Once the septum is pierced, solvent evaporation from the vial occurs.