tender for chemical for water testing supply of chemical for water testing laboratory at public health engineering subdivision pandhana, supply of chemical for water testing laboratory at public health engineering subdivision pandhana sl. no. item description 1 ph buffer solution for 4 ph(crm) iso 17034 certified(bnd) 2 ph buffer solution for 7 ph(crm) iso 17034 certified(bnd) 3 ph buffer solution for 9.2 ph(crm) iso 17034 certified(bnd) 4 turbidity 100ntu(rm) iso 17034 certified 5 calcium standard solution 1000 mg/las caco3 (crm) 6 colour standard solution 500 hazen(crm) 7 conductivity standard solution potassium chloride(nominal 1.41 ms/cm)(rm 8 sodium carbonate(crm) 9 sodiumchloride(crm) 10 total dissolve solid(tds) standard solution potassium chloride calibration standard 1000mg/i(crm) 11 potassium dichromate traceable certificate to crm 12 distilled water 1st grade