J Forensic Sci, Mar. 2003, Vol. 48, No. 2 (https://www.thevespiary.org/rhodium/Rhodium/pdf/forensic/ghb-gbl.nmr.analysis.pdf)
(https://www.thevespiary.org/rhodium/Rhodium/pdf/forensic/ghb-gbl.nmr.analysis.pdf)believes his A/B extraction of the product in combination with an AC clean would be a good substitute for the recomended distillation
As stated in this thread, there is no good substitute for the recommended distillation. Although of course you are welcome to try! If you have success (or failure even), The Hive is happy to read what you have to say about it! Beware of the brown gas! Perform under a fume hood if possible, but don't put your life in the hands of your local electricity provider.
Post 458114 (https://www.thevespiary.org/talk/index.php?topic=5715.msg45811400#msg45811400)
(gruns: "Preparation of Sodium Nitrite: Discussion", Chemicals & Equipment)