bids are invited for supply of lab items 1,2-cyclohexylenediaminetetraacetic acid , cod chemical 0-60 mg per l , plastic beaker 25ml , plastic volumetric flask 100ml , porcelian disk 50ml capacity , weighing bottle 20ml , quartz macro cuvette 10 mm optical path length , rubber bulb for pipetting , micro-pipette tip 2-200 ul size , micro- pipette tip 50-1000 ul size , micro-pipette tip 1000-10,000 ul size , bod bottles 300 ml , pipette stand , ph 7 capsule , sodium hydrogen sulfite , calcium carbonate volumetric standard secondary reference material for complexometry traceable to nist standard reference material srm certipur 1,2-cyclohexylenediaminetetraacetic acid, cod chemical (0-60 mg-l), plastic beaker 25ml, plastic volumetric flask 100ml, porcelian disk 50ml capacity, weighing bottle 20ml, quartz macro cuvette 10 mm optical path length, rubber , laboratory beakers (v2) as per is 2619 ph paper total quantity : 186