bids are invited for 112-at-2001 - 112-at-2001, methane 1.00 mol%, balanceethane (cylinder capacity-10 litres) , 113-at-6201 - 113-at-6201, ethylene 0.30 %, hydrogen 40%,balance methane(cylinder capacity-10 litres) , 113-at-6501 - 113-at-6501, methane 250 ppm, balance nitrogen (cylinder capacity-10 litres) , 113-at-6801 stream 2 - 113-at-6801, stream 2 propylene 500 ppm, propane 500ppm, acetylene 1.00 %, ethane 30 %, balance ethylene (cylinder capacity-10 litres) , 113-at-7001 - 113-at-7001propylene 300 ppm, hydrogen 200 ppm,acetylene 2 %, ethane 30%, balance ethylene (cylinder capacity-10 litres) , 113-at-6701 - 113-at-6701 carbon monoxide 0.30 %, nitrogen 0.20%, ethane 0.10%, acetylene 0.10%, ethylene 0.30% , methane 18%, carbon dioxide 0.50% balance hydrogen (cylinder capacity-10 litres) , 113-at-6702 - 113-at-6702 carbon monoxide 0.50 ppm, methane 500 ppm, acetylene 3 ppm, ethylene 500ppm, balance hydrogen (cylinder capacity-10 litres) , 113-at-7801 - 113-at-7801 methyl acetylene 2%,propadiene 2% propane 10%balance propylene (cylinder capacity-47 litres) , 113-at-8601 - 113-at-8601 hydrogen 8 ppm, ethane 200ppm, ethylene 100 ppm, propane 0.20%methyl acetylene 3 ppm, propadiene 3 ppm,balance propylene (cylinder capacity-47 litres) , 113-at-8502 - 113-at-8502cis-2-butene 0.1%, butene - 10.10%, propylene 2.00%, iso butane 0.20%, methyl acetylene 0.25%, n-butane 0.20%, propadiene 0.25%, n butane 0.20%, balance propane (cylinder capacity-47 litres) , 113-at-8001 - 113-at-8001 cis-2-butene 3 % trans-2-butene 3 % butene-1 3 % propadiene 5 % propane 7 % iso butylene 3 % methyl acetylene 5 % 1,3 butadiene 7 % iso pentane 0.5 % npentane 0.5 % propylene balance(cylinder capacity-47 litres. sample must be gas phase) , 113-at-8002 - 113-at-8002 propane 0.15 % propylene 0.15 % methyl acetylene 0.05 % propadiene 0.05 % isobutane 5 % n-butane 8 % isobutylene 20 % 1-butene 15 % cis-2-butene 15 % trans-2-butene 15 % iso pentane 1.5 %balance hexene (cylinder capacity-10 litres. 4