Kit for the determination of total water hardness

To determine the total hardness of water quickly and easily. ,water hardness was due mainly to the presence of divalent ions calcium and magnesium , and its determination is essential for controlling the operation of softeners and purification systems by reverse osmosis . ,evaluation of this parameter earns increasingly important for disorders that cause hard water in the pipes , electrical and hydraulic machines. ,water classification according to the scale of hardness: ,very soft ( 0-70 mg / l of caco3 ) . ,soft ( 70-150 mg / l of caco3 ) . ,slightly hard ( 150-250 mg / l of caco3 ) ,moderately hard ( 250-320 mg / l of caco3 ) ,hard ( 320-420 mg / l of caco3 ) ,very hard ( 420 mg / l of caco3 and higher) . ,the kit contains : ,hardness reagent . ,docificador bottle with 30 ml . ,calibrated plastic cup of 50 ml. ,manual and conversion table to interpret the result in ppm , french degrees , grados german and english . ,specifications: ,range : 40 - 500 mg / l of caco3 . ,analysis method : drop counting . ,amount of sample : 50 ml . ,number of determinations : 50 .