bids are invited for boron standard solution 1000 ppm 100 ml in accordance with iso 17034 certificate , sodium chloride 45 gm in accordance with iso 17034 certificate , potassium chloride 45 gm in accordance with iso 17034 certificate , sodium carbonate 45 gm in accordance with iso 17034 certificate , flouride standard solution 1000 ppm 500 ml in accordance with iso 17034 certificate , sulphate standard solution 1000 ppm 500 ml in accordance with iso 17034 certificate , conductivity standard 1.41 millisiemens per cm 500 ml in accordance with iso 17034 certificate , ph buffer solution 4.00 500 ml in accordance with iso 17034 certificate , ph buffer solution 7.00 500 ml in accordance with iso 17034 certificate , ph buffer solution 10.00 500 ml in accordance with iso 17034 certificate , nirate standard solution 1000 ppm 500 ml in accordance with iso 17034 certificate , nitrite standard solution 1000 ppm 500 ml in accordance with iso 17034 certificate , calcium carbonate 20 gm in accordance with iso 17034 certificate , turbidity standard 500ppm 500 ml in accordance with iso 17034 certificate , cod standard 500ppm 100 ml in accordance with iso 17034 certificate , phosphate as p standard solution 1000 ppm 100 ml in accordance with iso 17034 certificate , ammonia as nitrogen 1000 ppm 100 ml in accordance with iso 17034 certificate , silicate as si standard solution 1000 ppm 100 ml in accordance with iso 17034 certificate , bod standard 1 set in accordance with iso 17034 certificate , potassium hydrogen iodate 0.025 n standardized solution 1 l in accordance with iso 17034 certificate , suprapure nitric acid for trace metals 475 ml in accordance with iso 17034 certificate