醋酸、盐酸酸化对碘法滴定测定保险粉含量的影响

THE EFFECT OF ACIDIFYING WITH ACETIC ACID AND HYDROCHLORIC ACID ON DETERMINATION OF SODIUM HYDROSULFITE CONTENT BY IODOMETRY

保险粉是一种重要的化工产品 ,大量用于印染行业 ,其含量的高低可反映质量的优劣。采用碘法滴定测其含量 ,并探讨了醋酸酸化和盐酸酸化对测定结果的影响。结果表明用盐酸酸化比用醋酸酸化测含量受时间和温度变化的影响小 ,测定结果更接近真实值。

Sodium hydrosulfite is an important chemical product and appliedto the dyeing and finishing industry in large quantities. The content of sodiumhydrosulfite will affect the quality of the dyeing. Determination of its content by idometry is performed and the effect of acidifying with acetic acid and hydrochloric acid on the result of the test is investigated. It shows that determination of sodium hydrosulfite content is less affected by time and temperature change when acidified with hydrochloric acid than with acetic acid and that the test result is nearer to the real value.