supply of refilling of empty argon cylinderrefilling of empty argon cylinder,refilling of empty argon cylinder with ultra high purity quality 99.999% argon gas for use in direct reading optical emissi on spectrometer to grade -i of is.5760/98 with specified limits, oxygen-0.5ppm max, nitrogen-2.0 ppm max, hydrogen-1.0 ppm max, w ater vapour -0.5ppm max, carbon dioxide- 0.5ppm max, carbon monoxide- 0.5ppm max and hydrocrobons-0.2ppm max along with purity t est certificate for each refilling cylinder, qty: 24 nos (i.e 24 cylinders x 7cum = 168 cum) , supply is to be staggered at the rate of six cy linders per quarterly or as demanded by the consignee with in 48 hours. note: empty cylinders will be provided by cmt/lab and transport at the cost of the firm to the consignee. [ warranty period: 30 months after the date of delivery ] ]