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Autosampler Vials General

16 Does deactivation process of RSA-Pro autosampler vials add any chlorides to the glass surface?

No, the RSA-Pro surface treatments used do not add chlorides. Click HERE for Autosampler Vials, Caps, Inserts & Accessory Ordering Information © Copyright MicroSolv Technology Corporation, all rights…

17 Have the amber autosampler vials changed color compared to earlier batches?

The amber vials catalog # 9502S-PP-AMBER have been discontinued due to instabilities in the material which was causing color changes. These items have been replaced with catalog # 9502S-PP-AM. You may…

18 How "tight" should an autosampler vial cap be to prevent "push-through" of the septa during injection?

For application of autosampler vial screw caps, "tight" could refer to torque applied to the cap during application of the closure to the vial or the ability to hold a seal and not allow evaporation.…

19 How are your polypropylene vials & inserts for LC-MS different from those of other manufacturers?

These plastic vials and inserts are made with "ultra-virgin" polypropylene and are specifically suited for LC-MS. What this means is that the material is made of a proprietary polymer which is free of…

20 How can I minimize bubble formation with limited volume vials?

Vials with small volume internal ID are designed to allow the user to use most of the sample which may be too low for the injection needle to reach with standard, flat-bottom vials. One drawback, is that…

21 How is the amber color produced in the polypropylene/glass amber autosampler vials?

The amber color present in some of the autosampler vials is created by organic or inorganic pigments or dyes. In glass vials, the amber color is from iron oxide (Fe2O3), added in less than 1% concentration.…

22 I see black spots in my amber vials. Can they be a source of contamination?

These spots are most likely the remnants of the vial-forming process and are comprised of amber glass and trapped air. When two different QC tests are run on these vials it verifies that these types of…

23 In a cap that contains a butyl rubber/PTFE septa, which direction does the PTFE membrane face?

The PTFE (Teflon) part of the septa faces the sample (i.e. faces toward the vial when placed on the cap). If you have any doubt if the septa is inserted into the cap properly, the rule of thumb is that…

24 In a cap that contains a Silicone/aluminum septa, which direction does the aluminum membrane face?

The aluminum part of the septa faces the sample (i.e. faces toward the vial when placed on the cap). Autosampler Vials, Inserts & Caps © Copyright MicroSolv Technology Corporation, all rights reserved.…

25 In a cap that contains a Silicone/PTFE septa, which direction does the PTFE membrane face?

The PTFE (Teflon) part of the septa faces the sample (i.e. faces toward the vial when placed on the cap). If you have any doubt if the septa is inserted into the cap properly, the rule of thumb is that…

26 In order to prevent gas venting from a closed autosampler vial, should I use snap, crimp, or screw cap

The crimp cap provides the best quality seal for the longest duration but only if the crimping tool that is used to create the seal is calibrated properly. To maintain adequate calibration, you should…

27 Is formic acid compatible with borosilicate glass?

Formic acid is generally compatible with borosilicate glass. There are two aspects that one needs to be mindful of when storing formic acid in glass vials or inserts. Formic acid gradually decomposes…

28 Is the PTFE in the screw cap 9509S-10C-B "cast" or "skived"?

The PTFE is "cast" for the AQR™ septa in the screw caps which includes our catalog number 9509S-10C-B as well as many other AQR brand screw and snap caps. It is much easier to control the quality of…

29 Silicone rubber in septa for autosampler vials vary in the way it is made.

Silicone rubber is the backbone of most modern septa for chromatography vial caps. But the way the silicone is made will vary from manufacturer to manufacturer and even within the same manufacturer or…

30 Understanding Deactivating or Silanizing Glass Vial & Insert Surfaces for Chromatography.

To deactivate glass vials and inserts to minimize adsorption of proteins, peptides and other compounds for laboratory use, a "coating" process using a silicone oil dispersed in a solvent is commonly used.…

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