bids are invited for phosphate standard solution - phosphate standard solution traceable to srm from nist kh2po4 in h2o 1000 mg/l po4 (crm) , nitrate standard solution - nitrate standard solution traceable to srm from nist nano3 in h2o 1000mg/l no3 (crm) , ammonia or ammonium chloride - ammonia (as nh3-n) crm or ammonium chloride in water 1000mg /l (traceable to srm from nist) , silicate standard solution - silicate standard solution 1000 mg/l(in h2o medium) (crm)(traceable to srm from nist) , bod-crm - bod-crm (1000mg/l) , potassium hydrogen phthalate for cod - potassium hydrogen phthalate (for cod) crm , buffer solution ph 9.18 - buffer solution ph 9.18 (250c) (crm) , potassium chloride solution - potassium chloride solution (nominal 1.41 ms/cm) 0.01 mol/l (crm) , sodium carbonate - sodium carbonate (crm) , potassium chloride - suprapure - potassium chloride (suprapure)(crm) , iron standard solution - iron standard solution (1000 ppm) (crm) , nickel standard solution - nickel standard solution (1000 ppm) (crm) , lead standard solution - lead standard solution (1000 ppm) (crm) , arsenic standard solution - arsenic standard solution (1000 ppm) (crm) , cadmium standard solution - cadmium standard solution (1000 ppm) (crm) , zinc standard solution - zinc standard solution (1000 ppm) (crm) , chromium standard solution - chromium standard solution (1000 ppm) (crm) , copper standard solution - copper standard solution (1000 ppm) (crm) , mercury standard solution - mercury standard solution (100 ppm)(crm) , ethyl alcohol - ethyl alcohol-ar grade , fluoride isa buffer , fluoride standard solution - fluoride standard solution (100 ppm) , ammonia nitrogen isa buffer , ammonia nitrogen - ammonia nitrogen solution (100 ppm) total quantity : 98610