What can I dispense with the Dispensette® TA?
The Dispensette® TA is specially designed to dispense high-purity chemicals, with trace metal content of dispensed liquid generally in the low ppb range, or, depending on the application, even in the low ppt range. The platinum-iridium model is suitable for dispensing Hydrofluoric acid (HF), while the tantalum model is suitable for dispensing Hydrogen peroxide (H2O2). Additionally, the Dispensette® TA can be used to dispense Bromine since the ball valve, composed of Al2O3 sapphire, is denser than the ball valves in the Dispensette® III or Dispensette® Organic. See the Dispenser TA selection chart for a complete list of compatible reagents: click here.
My Dispensette® TA seems to leak at the base, especially after priming. How do I stop this?
It's probable that the recirculation tube was not reinserted into the underside of the instrument. This directs liquid down the side of the bottle, to help keep from generating additional bubbles when priming. When absent, some liquid can dribble down the side of the instrument. If you need a replacement, the part number is 8317 and can be ordered from your favorite supplier.
My Dispensette® TA is drawing up bubbles and liquid? What should I do?
Your Dispensette® has an air leak somewhere. Good places to look are at the junction of the filling tube and filling valve. If it does not make a tight seal, trim some of the tube off, and reattach. Check to see if the filling and discharge valves are tight, and the sealing washers are in place. Lastly, is there any liquid in the bottle?
The cylinder of my Dispensette® TA doesn't fill. What is happening?
There are several different causes that could keep a Dispensette® cylinder from filling: 1) The discharge tube and/or SafetyPrime™ valve are not fitted properly. Check to ensure they are attached properly, and that the sealing washers are in place. 2) The filling valve is not tight or the filling tube is not pushed in enough. Recheck the connections. 3) The filling valve is dirty. This case can be determined easily because the Dispensette® piston will be difficult to lift, and it gets "sucked back down" when released. Clean the valve.
I can fill the cylinder, but it won't dispense. Why?
The discharge valve is probably stuck. Remove the discharge tube and clean the valve. If necessary, replace the discharge tube.
Is the Dispensing Cartridge replaceable?
Yes. The Dispensing Cartridge for the Dispensette® TA is a replacement part. It is catalog number 707542 - Dispensing Cartridge with Safety Ring - and comes calibrated with a quality certificate.
All through the catalog, it mentions that the "Standard Operating Procedure" for instrument calibration is available. How do I get one?
The SOP for the Dispensette® is available here. Additionally, all of the SOP's for BRAND's liquid handling instruments, as well as the BLAUBRAND volumetric glassware are compiled in EASYCAL™ 4.0 for easy reference.