2ml ND9 Screw Vial

Mastelf 2ml ND9 is an alternative to the products of these brands:- Waters:- Chromacol:- National Scientific:- Wheaton:- Finneran:- National Scientific- VWR

Additional information




Type 33, 51 and 70

Bottom Type

Flat Bottom

Writing Patch



Amber and Clear






Pakkaging in pp tray and plastic film covered



Autosampler compatibility


Storage Temperature



ND9 Screw Neck

2ml ND9 screw vials are 40% larger opening than standard narrow opening vials, made from borosilicate glass.

These class 1 laboratory-tested vessels meet ASTM Type 1 and USP Type 1 standards so your lab is secure and you can take comfort in knowing that your measurements are tight. Please also find the below for the right selections.


  • ND9 Plastic vials we have are available for amber and clear. ND9 Plastic Vials are made of non-disintegrating polypropylene as a special spin-cast process to ensure maximum strength and dimensional accuracy. In combination with closure (fluorine-free), ND9 Plastic Vials are recommended for PFAS analysis.
  • The main difference between Interlocked insert vial and glass insert is whether it is fused or not. Of course, this fusion eliminates the movement of the insert during shipment, preventing contamination from bacteria around the fused seam from entering the package.
  • Available in unique packaging designed to reduce vial breakage.
  • If you’re able to prevent vacuum build-up from inside of your vial, then pre-slit septa are the best option for chromatography.
  • High recovery vials made from 1st hydrolytic class glass keep your samples safe and secure. With a conical well, you get the best possible chance of preserving and maximizing samples and chemical compounds for further use and research after experiments.
  •  Glass integrated vial was welded with a glass insert (conical insert, 250ul) during the manufacturing process. The insert is fixed and allows for the injection of solutions to be done more conveniently. As an alternative, inserts can be purchased independently, which means that they can be manually placed into vials.
  • PP integrated vial is made up of Polypropylene (PP), a non-reactive plastic that can be used to replace glass where it is not suitable. Due to the one-piece molding, it cannot be separated.  Maximum volume is 250ul.
  • Recovery vial has a conical design of the bottom of the vial, the arc at the bottom makes it easier for the centrifuge to work. There is a maximum volume of 1.5 mL in this vial, as well as a minimum residual volume of 22 um.
  • The bonded cap is an ideal design for preventing septa drop from the top of the cap. We provide a non-glued design to prevent contamination.
  • Do they make you frustrated when you screw on each cap to the vial? No more frustration. This screwed-up set is ready for your use, safe time and improve efficiency. 


Frequently Asked Questions

An autosampler vial is a small, specially designed container used in laboratory settings to hold liquid samples for automated injections into analytical instruments like chromatographs or mass spectrometers. Imagine it as a tiny, high-tech cup for your precious liquid samples!

Reusing vials and septa can mess up your chromatography and cause your assays to fail. You might have to redo the whole experiment, which can be time-consuming and frustrating.

Screw-top vials are the go-to for HPLC and LCMS. You don’t need any special tools to put the cap on or take it off. Crimp vials are the preferred choice for GC analysis. They’re the gold standard when it comes to preventing sample evaporation.

  • When it comes to vial material, glass is your go-to for sensitive HPLC work. But plastic has its moments too, like when you’re dealing with chemicals that don’t get along with glass, like hydrogen fluoride. 
  • Plastic vials are perfect for analyzing heavy metals, water, and proteins, and for capillary electrophoresis (CE) and ion chromatography (IC). 

High recovery vials are indeed a specific type of container used in laboratory settings, particularly in chromatographic analyses like HPLC and LCMS. They’re designed to minimize sample loss on the vial walls, meaning you get more of your precious sample available for injection and analysis, leading to potentially better results.

Here’s what makes high recovery vials special:

  • Surface treatment: Typically have a silanized or deactivated surface, which reduces the interaction between the vial wall and your sample molecules. This prevents sticking and adsorption, ensuring more of your sample remains available for analysis.
  • Vial shape: Some high recovery vials have a conical bottom to concentrate the sample at the bottom, making it easier to extract and inject the entire sample volume.
  • Closure design: Certain types might have a special cap liner that further minimizes sample loss through evaporation or interaction with the cap material.

When would you need to use high recovery vials?

  • Low-abundance samples: When you have limited sample volume or your analytes are present in trace amounts, maximizing sample recovery is crucial for accurate analysis.
  • Sticky analytes: Certain molecules tend to stick to glass surfaces, leading to sample loss. Using high recovery vials helps overcome this issue and improve analysis accuracy.
  • Sensitive assays: When your analysis requires accurate quantification of every available sample molecule, even small losses on the vial wall can significantly impact the results. High recovery vials minimize this risk.
  • Cost concerns: Repurchase or synthesis of expensive samples can be costly. High recovery vials help prevent the need for resampling by maximizing the available sample for analysis.

Things to consider when using high recovery vials:

  • Cost: High recovery vials are typically more expensive than standard vials.
  • Compatibility: Ensure the vials are compatible with your autosampler and analytical instrument.
  • Storage: Choose appropriate storage conditions based on your sample and vial material.

Overall, high recovery vials are a valuable tool for any chromatographer seeking to maximize sample recovery, improve analysis accuracy, and potentially reduce costs in the long run. If you’re working with limited samples, sticky analytes, or sensitive assays, consider using high recovery vials for optimal results.