Combitips

[David Johnstondaj]

On 16 Jul 93 20:55:49 GMT,
  Patricia Foster writes:


>Sterilizing Pipette tips, Summary
>dealing with the non-autoclavable Combitips for Eppendorf repeater 
pipette..........stuff deleted

For what it is worth, we have just invested in a Socorex repeater pipette. 
The "combitips" for this are branded "ECOSTEP". Having seen the 
previous postings on the eppendorf combitips, I got worried and had a go at 
autoclaving some of ours (ready assembled @121C for 15mins). I then 
checked the callibration by repeat pipetting distilled water on a balance. 

Results: no cracking of tips, error <0.7% (frequently <0.2%) over volume 
range of 10-500ul per dispense, 10-100 dispenses (honest, I was 
surprised too!).

Maybe "ecostep" tips fit the eppendorf pipettor (the barrel has a square 
flange of side approx 20 mm, the plunger has a round flange of dia approx 
11.5mm)

Usual disclaimers,
Cheers, 
DAJ
David A. Johnston
Dept of Zoology, The Natural History Museum, Cromwell Road,
South Kensington, London SW7 5DB.
(tel 071 9389297, fax 071 9388754, email daj at nhm.ic.ac.uk)