Need solvent to remove VOA's from syringe needle

[John R. Carver]

I need a syringe solvent to remove C2-C4 VOAcids to prevent needle contamination. We have
used MeOH and EtOH but still experience VOA carry over in our di H2O blanks (0 ppm). The GC
column is a Nukol, 15m,0.53mm, 0.5 um thickness. We cannot use a solvent thay may cause
a precipatate with the organic biomass water extracted samples.

[HW Mueller]

For zero carryover from syringes you have to take the piston out, pull solvent through the syringe and wash the piston separatly. The solvents you mentioned should be OK.