chemicals and other required items related to smooth functioning of nabl recognition of kakdwip sub district water testing laboratory, under alipore division phe dte.- 1 arranging pt samples from verified pt provider and supervise cum assist for preparation & record of proficiency testing & the related technical documentation for nabl recognition and all related payment for pt samples testing. e ) 2 calibration of measuring instruments traceable to nabl & as per requirements of nabl guideline for the equipments required for 11 mandatory and other optional parameters ( where ever applicable ) including refrigerator, oven, weight box, burette, pipette of different volume, volumetric flask of different volurne, measuring cylinder of different volume, thermometer & any other measuring instruments required for calibration as per nabl traceability & conformity with all calibration certificates. 3 calcium carbonate volumetric standard. secondary reference material for complexometry, traceable to nist standard reference material ( srm ) 4 edta disodium salt ( titriplex-iii ) , 100 gm 5 sodium chloride volumetric standard, srm for argentometry, traceable to nist 6 sodium carbonate volumetric standard, secondary reference material for acidimetry, traceable to nist srm 7 bromocresol green indicator 8 methyl red 9 sodium hydroxide 1n, 2 amp 10 water for chromatography, 1 lit pk 11 turbidity standard non ratio, 1000 ntu, certified by iso 17025 accredited test method. nist traceable, 500 ml 12 ph buffers - 25°c : clear, colourless ph buffer solutions. tested at 25°c and certified by reagecons iso 17025 accredited test method. nist traceable, ph:4.00 ±0.01@25°c in 500 ml 13 ph buffers - 25°c : clear, colourless ph buffer solutions. tested at 25°c and certified by reagecons iso 17025 accredited test method. nist traceable, ph:7.00 ±0.01@25°c in 500 ml 14 ph buffers - 25°c : clear, colourless ph buffer solutions. tested at 25°c and certified by reagecons iso 17025 accredited test method. nist traceable, ph:10.00 ±0.01@25°c in 500 ml 15 methyl orange indicator 16 ammonia buffer ready to use solution, 500 ml 17 nesselar cylinder, for colour comparison graduated as per is4161:1967 18 tissue paper 19 desiccator 8 dia