tender for chemicals and other required items related to smooth functioning of nabl recognition of silampur sub district laboratory, under howrah 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. 2 calibration of measuring instruments traceable to nabl & as per requirements of nabl guideline for the equipments viz. spectrophotometer, ph meter, turbidity meter, 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