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Sprayers, Scales, and Syringes
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gentlmentlemen
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Post: #28
RE: Sprayers, Scales, and Syringes
03-13-2012 10:28 AM

I wonder if the whole "touching the tip of the drop to the wall of the container" thing will be an issue. If the carrier is 100% DPG I could see that being an issue... and just in general for anything with high enough surface tension that will tend to happen...

Perhaps the motor that rotates and raises the mix bottle underneath the pipette could do that somehow, but if that's the case I'll have to increase the accuracy of that significantly, and it still might be difficult. Besides having to then keep track of the mix bottle's liquid's height, I don't know if it would be easy to touch it to the side, the pipette's width would probably get in the way. So a rotating and raising design would probably need to also rotate the pipette or bottle very slightly at the end to touch the drop, but then if you touch it to the same place on the side of the bottle every time, there's a lot more potential for cross-contamination.

Maybe if the mix bottle wasn't rotated and raised, but translated sideways, then raised.

Tbh though that issue might be a big pain to deal with... might be better to use concentrates dissolved in alcohol than in oil... then just add any fixative liquids as the last part. Even alcohol might have small drops though, I know it does with my syringe... and not dealing with the drops left at the tip will likely decrease the accuracy...

OH.... did you also mean that the pipette tips must stay in the liquid of the mix bottle for the entire time it is expelling liquid? Because that might solve it, but you'd definitely need to change the tips after that.

So basically fill it with however much PA and the like it needs, then fill it with the molecules?

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(This post was last modified: 03-13-2012 10:35 AM by gentlmentlemen.)
03-13-2012 10:28 AM
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RE: Sprayers, Scales, and Syringes - gentlmentlemen - 03-13-2012 10:28 AM

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