wbphed/ee/msd/nieq/03/22-23_1 supplying and delivery of laboratory chemicals/reagents to 19(nineteen) nos. water testing laboratory for national rural drinking water quality testing monitoring surveillance programme in state of west bengal under murshidabad division, p.h.e. , disodium dihydrogen versenate solution (0.01 m)(edta) , ammonia buffer , hydrochloric acid gr , chloroform gr , hydrochloric acid commercial grade , ferrospectral reagent solution ,range0.005-5.00 mg/l , tin (ii) chloride dihydrate gr , potassium iodide gr , morpholine , zinc filling(1-2 width) for arsenic test , manganese reagent, range 0.010-10.0 mg/l mn(250 test) , tissue papers , extran ma 02 , iron standard soln , maganese standard soln , ph buffer solution(4.01) , ph buffer solution(7.00) , ph buffer solution(10.01) , glass wool,low lead,250 gm , membrane filter gridded,sterile, individually packed,47mm dia/0.45micron porosity. , microquant chlorine test(free) range 0.010-6.00 mg/l cl2 with comperator