Hello everyone,

I am preparing a protocol for injecting insects (ant larvae, eggs, lepidopteran larvae) with small volumes such as 30-50nl. I'd be injecting acetone mixed with some oily alkaloids. I have previously used Hamilton Neuros syringes with quite good results but it is expensive and now in another faraway lab.

I have been now trying to secure a prepared capillary tube to the tip a normal glass Hamilton syringe. This is because the usual metal needle is too thick and beveled, thus not practical for injections of small volumes into small subjects.

However it is proving tricky: securing with a small piece of parafilm has been easier but hard to reproduce, and seems to not be sufficiently airtight. I have tried silicon but it didn't work well at all.

Does anyone here recommend some adaptation or alternative to the needle tips of Hamilton? 

Thanks in advance!