By Jonathan Holt on Thursday, September 18, 2003 - 01:27 pm:
Hello there.
I'm trying to make a sample loop for my autosampler, and because of the way it's designed, (to make a long story short) I need a tubing union which will accept a fitting that was designed to go into a rheodyne switching valve. Most unions I've seen accept valco or SSI etc fittings with the shorter post-ferrule lengths, but I can't seem to locate one that will take the ridiculously-long rheodyne fitting. My alternative is a $250 length of tubing from the autosampler manufacturer. I have too much pride to indulge them in a "deal" like that.
please let me know if you know where to find such a union.
THANKS!!!
Jonathan
PS feel free to email me directly if you prefer.
jholt@uiuc.edu
By Anonymous on Thursday, September 18, 2003 - 01:40 pm:
I would call Alltech. 800-255-8324 or
www.alltechweb.com
By Jonathan Holt on Friday, September 19, 2003 - 11:58 am:
Thanks, Anony. Alltech has a lot of stuff. . .but not this. Anyother suggestions?
cheers
Jonathan
By Anonymous on Friday, September 19, 2003 - 02:05 pm:
I may not understand your problem correctly, but why not get tubing (or an old sample loop cut into halves) and/or Rheodyne nuts and ferrules (available from Supelco) and buy a Valco zero dead volume union and make it work?
As I said, I may not understand, if so my apologies.
By HW Mueller on Monday, September 22, 2003 - 12:30 am:
Upchurch has "Litetouch" (and others) that fit everything. (Also: Apologies if the question was misunderstood)
By Jonathan on Wednesday, October 1, 2003 - 03:18 pm:
Hi again,
just wanted to let you know that I got it worked out with an upchurch "true zero dead volume" union. The chromatography looks great. So if you have an old HP 1050 autosampler and want to add a sample loop for under $250, grab some tubing and one of these fittings and you'll be set!
thanks for the suggestions!
Jonathan