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Liquid Handling

1 Battery of the hand held syringe pump appears it is not charging

“The battery does not appear to be charging and the screen is blank, it seems as though the battery is dead” As the voltage drops through usage from a full charge of 4.2V, actions in the software…

2 Battery use with the hand held syringe pump

The hand held syringe pump, eVol® uses a 3.6V lithium-ion rechargeable battery that has a capacity of 1050mAmp/hours. A fully charged battery allows for 2-4 hours of continuous dispensing use or approximately…

3 Can the 2 second time lapse by changed?

Can the 2 second laps of time between aspiration and dispensation be changed or is this a “safety” feature to ensure complete aspiration? Most pipettors are designed to be used with a particular pipette…

4 Chemical Resistance of the hand held syringe pump.

The "handle" of the hand held syringe pump, eVol is made from Polycarbonate. All of the pipette's we have investigated are made from Polycarbonate and are used in similar environments. Polycarbonate is…

5 Dispensing viscous liquids accurately.

The problem of aspirating and dispensing viscous liquids with a syringe is simply due to the liquid having to pass through the restriction caused by the narrow bore (ID) of the needle. If the liquid is…

6 How do I avoid microbial growth in my mobile phase?

Bacteria can be a problem in the case of aqueous solvents. If present, they can create problems for an instrument's operation. There are a few things you can do to avoid their formation in your mobile…

7 Maximum voltage level and battery charger not "turning green"

The battery indicator does not turn green to indicate a full charge even after 3-4 charges. It seems as though the eVol is never fully charged. The reason for the battery indicator not turning green to…

8 Pressure Conversion Chart

Use this handy chart to convert back pressures into different units of measure. psi Bar 72.5 5.0 100.0 6.9 144.9 10.0 362.4 25.0 500.0 34.5 724.7 50.0 1,000.0 68.9 1,449.5 100.0 1,500.0 103.4 2,000.0…

9 Solvents and solutions that should be avoided when using PEEK fittings or tubing.

The solvents and chemicals that should be avoided when using PEEK tubing and fittings include: Nitric acid Sulfuric acid Halogenated acids, including hydrofluoric, hydrobromic, and hydroiodic acids Pure…

10 Speeds to aspirate & dispense in the hand held syringe pump.

Below is a chart of the aspirate and dispense rates when different pumping speeds are selected for one of the three currently available hand held syringe pump handles. Pump Speed setting: 1 2 3 4 5 6…

11 Storing syringe sizes in the hand held syringe pump

The details of up to ten syringes can be stored in memory and recalled every time that syringe is selected. Information stored for each syringe, which is identified through its serial number and user-defined…

12 Storing syringe sizes in the hand held syringe pump.

The details of up to ten syringes can be stored in memory and recalled every time that syringe is selected. Information stored for each syringe, which is identified through its serial number and user-defined…

13 Syringe plunger sticking on the hand held syringe pump.

Analysis has determined that the “tightness” of the PTFE plunger tip in the barrel is directly related to that while PTFE is highly compatible with organic solvents, it may swell over a long period…

14 Syringe Pump needles used to pierce septa of autosampler vials.

The needles gauge of the hand held syringe pump, eVol needs to be 22 or lower (larger OD) and shorter to effectively pierce autosampler vial septa. The thin needle makes it harder to effectively drive…

15 Wearing gloves and using the hand held syringe pump.

In many laboratories, gloves are routinely worn as part of the laboratory safety protocols, particularly in laboratories processing biological samples such as our target laboratories in clinical and forensic…

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