procurement of emerson make standards solution for swas analyzers ( such as dissolved oxygen analyser, ph electrode and conductivity electrode ) at 2x660 mw, stage-ii, sstpp, mppgcl, dongalia , dissolved oxygen electrode sensor filling solution part no. 9210264 [ packing size: 4 oz ( 125 ml ) ] , 4.01 ph buffer part no. 9210012 [ packing size: 16 oz ( 500 ml ) ] , 6.86 ph buffer part no. 9210013 [ packing size: 16 oz ( 500 ml ) ] , 9.18 ph buffer part no. 9210014 [ packing size: 16 oz ( 500 ml ) ] , conductivity standard ss-6, 200 ?s / cm, part no. 05010781899 [ packing size: 32 oz ( 946 ml ) ]