supply of chemicals and consumables etc . required for smooth running of different laboratories of rws purulia sub-division under purulia division , phe dte . ( for 3 months ) -1 supply of edta n150 ml solution for total hardness analysis ( 500m1 / pack ) nmake fisher / sigma / finer ( inclusive all taxes ) 2 supply of ammonia buffer solution fortotal hardness analysis ( 500 ml / pack ) . make:merck / fisher / sigma / finar ( inclusive all taxes ) 3 supply of edta n / 50 solution for total hardness analysis ( 500m1 / pack ) ( 25gmipack ) make: merclc / fisher / s igma, / finar ( inclusive all taxes ) 4 turbidity standerd solution for tq iiooir nmake: merck ( inclusive all taxes ) 5 buffer ph 4.01@25 deg c calibration solution calibrated against nist traceable sbs ( 480ml pack ) suitable for inclab ph510 / 700 ph meter nmake: eutech / wtvv / eauiv ( inclusive all taxes ) 6 buffer ph 7.00 @25 deg c calibration solution calibrated against nist traceable sbs ( 480m1 pack ) nmake: eutech / wtwiequiv ( inclusive all taxes ) 7 buffer ph 10.01 @25 dec c calibration solution calibrated against nist traceable sbs ;480m1 pack ) nmake: eutechantw / equiv ( inclusive all taxes ) 8 potassium dichromate, analytical grade ( 500gm ) ( inclusive all taxes ) 9 spectrophotometric reagents for fluoride analysis, range:0.10-20.0 mg / l of f ( 250 test / pack ) nmake: marck / lovibond / palin / iv or equivalent ( inclusive all taxes ) 10 reagent suitable for spectrophotometric analysis of manganese in potable water min range : 0.01-0.7 mg / l of manganese, ( 250tests / pack ) nmake: marck / lovibond / palin / wfw ( inclusive all taxes ) 11 reagent suitable for spectrophotometric analysis of iron potable water, range 0.02-3.00 mg / i soluble iron ( 1000 tests / pack ) nmake: merck / lovibond / palin / wtw ( inclusive all taxes ) 12 total ionic strength buffer solution- iii for fluoride estimation soln suitable for lonometric analysis of fluoride ( 475 ml / pack ) thermo-orion / merck / carlo erba ( inclusive all taxes ) 13 fluoride standard solution traceable to srm from nist traceable ( 500ml / pack ) nmake: lnorg vent / reagecon / merck / sigma / equivalent ( inclusive all taxes ) 14 dpd tablet for residual chlorine, easily dispersible, suitable for comparometric determination, pack of 250 tabs make: lovibond ( inclusive all taxes ) 15 chromogenic cotiform agar, for simult€neous determination & count of escherichia coli and total coliforms in water samples as per iso 9308-1:2014, 100 gm pack merclc / himedia ( inclusive all taxes ) 16 consumables for bacteriological analysis by mf technique, membrane filter- cellulose nitrate, sterile- individually packed, white membrane, gridded, 47mm dia, 0.45 micron porosity, pack of 100 circles mercvhimedia / axiva ( inclusive all taxes ) 17 supply of consumables for bacteriological analysis by mf technique, radiation sterilie plate 15 x 60mm, 250nos a pack ( inclusive all taxes ) 18 supply of sterilising ether solvent ( biosol ) ( 450mi / pack ) ( inclusive all taxes ) 19 supply of hydrochloric acid laboratory grade ( 5 lit ) pack iron content 0.0001% max. make - merck / fisher / finer / equivalent ( inclusive all taxes ) 20 aluminium foils 9 mt -hindalco / equivalent ( inclusive all taxes ) 21 tissue rolls ( medium ) -2x2lmt ( inclusive all taxes )