rate contract for supply of chemicals as crm and srm under jjm rate contract for supply of different chemicals as certified reference materials and standard reference materials for different water testing laboratories under jjm assam , arsenic standard solution 1000 mg/lit, traceable to nist , fluoride standard solution 1000 mg/lit, traceable to nist , nitrate standard soluble traceable to srm from nist nano3 in h2o 1000 mg/l no3¯ , iron standard solution 1000 mg/lit, traceable to nist , sodium carbonate volumetric standard, srmi for acidimetry, traceable to nist srm , sodium chloride volumetric standard, srm for argentometry, traceable to nist srm , buffer solution ph 4, traceable to nist, colour coded (parameter - ph) , buffer solution ph 7, traceable to nist, colour coded(parameter - ph) , buffer solution ph 10, traceable to nist, colour coded(parameter - ph) , turbidity 1000 ntu calibration standard-formazin, reference standard, traceable to nist. , total dissolved solids 1000 mg/l calibration standard, certified reference material, traceable to nist. , calcium carbonate volumetric standard, secondary reference material for complexometry, traceable to nist standard reference material (srm) certipur® (parameter - total hardness) , calcium carbonate volumetric standard, secondary reference material for complexometry, traceable to nist standard reference material (srm) certipur® (parameter - ca-hardness) , calcium carbonate volumetric standard, secondary reference material for complexometry, traceable to nist standard reference material (srm) certipur®(parameter - mg-hardness) , sulfate standard solution traceable to srm from nist na2so4 in h2o 1000 mg/l so4²?