supplying and delivery of laboratory chemicals reagents and glassware to 19 nineteen no water testing laboratory for national rural drinking water quality testing monitoring surveillance programme related to operation maintenance , disodium dihydrogen versenate solution ( 0 . 01 m ) ( edta ) merck ( 500 ml ) , ammonia buffer ( merck / thermofischer / sigma / fluka ) ( 500 ml ) , hydrochloric acid gr ( merck / thermofischer / sigma / fluka ) ( 500 ml ) , chloroform gr ( merck / thermofischer / sigma / fluka ) ( 500 ml ) , hydrochloric acid commercial grade ( merck / thermofischer / sigma / fluka ) ( 5 litre ) , ferrospectral reagent solution , range0 . 005-5 . 00 mg / l merck ( 4 x 30 ml a pack ) , tin ( ii ) chloride dihydrate gr ( merck / thermofischer / sigma / fluka ) ( 100 gm ) , potassium iodide gr ( merck / thermofischer / sigma / fluka ) ( 100 gm ) , silver diethyldithio carbamate gr for analysis of arsenic , 1 . 01515 ( merck / thermofischer / sigma / fluka ) ( 5 gm ) , zinc filling ( 1-2 width ) for arsenic test ( merck / thermofischer / sigma / fluka ) ( 500 gm ) , manganese reagent , range 0 . 010-10 . 0 mg / l mn ( 250 test pack ) ( merck / thermofischer / sigma / fluka ) , tissue papers superior quality ( roll , 2 ply , 21 x 2 mt ) , glass wool , low lead , 250 gm , elementary flask glass with similar std joint for glass ( riviera ) ( 100ml ) , volumetric flask , glass a ( riviera ) ( 5ml ) , arsine tube , interchangeable std jt ( riviera ) , glasswool adaptor interchangeable similar std joint for arsine generator flask , gloves ( box ) , biosol ( 450 ml ) , petri dish 75 mm ( 25nos . x10 ) , membrane filter gridded , sterile , individually packed , 47mm dia / 0 . 45micron porosity . ( 100 nos per pack ) , chromogenic coliform agar for simulteneous determination & count of escherichia coli and total coliform in water sample as per iso 9308 . 1:2014 ( merck / himedia ) ( 100 gm )