In order to kill all victims in a few minutes as told by the 'witnesses', we assume that the Zyklon B must have released enough HCN to reach an average concentration of 10g/m3 after 10 minutes....the minimum amount of Zyklon B used in the alleged chambers would have been TEN times the amount normally used for delousing
So called 'eyewitnesses' allege death in 5-10 minutes which would mean massive amounts and massive residue in the alleged gas chambers...BUT....there's only microscopic residue (from infrequent delousing) at these sites, yet utterly massive amounts of residue in the acknowledged delousing facilities.
see: part C. - Chemical Analysis of Brick and Mortar Samples, sec.4 of:
'Critique of Claims Made by Robert Jan Van Pelt':
http://www.vho.org/GB/c/GR/RudolfOnVanPelt.html
In fact, this entire critique by Rudolf is highly recommended.
- Hannover