tender for set of standard chemicals .(1) buffer referance standard solution of ph10.00 (+ or -) 0.01, ph 7.00 (+ or -) 0.01 and ph 4.00 (+ or -) 0.01 (each standard solution of 500 ml /perset .capacity @25 deg. celcius) . (2) flow cup viscosity standard solvent qty- 500 ml/ per set. make- sigma aldrich or merck or fischer.
