Development of A Novel Standard Turbidity Solution

A inorganic X-Ⅰturbidity solution with 40 NTU turbidity value was prepared.The comparison experiments between X-Ⅰturbidity solution and organic polymer Formazine reference fluid with the same turbidity value were carried out in 3 min determination time and under 16-32 ℃ natural variable temperature.The results showed that the stability of turbidity value of X-Ⅰturbidity solution was a little superior to that of organic polymer Formazine reference fluid.There was not degradation to X-Ⅰturbidity solution within 7 d in room temperature and natural light irradiation and the stability of its turbidity value was greatly better than that of Formazine reference fluid with the same turbidity value.The turbidity value of X-Ⅰturbidity solution was stable within 30 d and could be used as the substitution of Formazine standard turbidity solution or as secondary standard turbidity solution.