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环境水样中硫酸根的测定,通常采用重量法和比浊法,但重量法操作繁冗,比浊法误差大,实用中受到限制。我们在四苯硼钠电位滴定钡的基础上,进一步探讨了用反滴法测定环境水样中硫酸根的方法。讨论了影响结果准确度和精密度的因素。本法能测定62.5μg至25mg的硫酸根。方法精密度好,准确度好;硫酸根离子含量为1.274mg时测定的变动系数为0.3％,与重量
Determination of sulfate in environmental water samples, usually using the gravimetric method and turbidimetric method, but the weight method is cumbersome, turbidimetric error, practical restrictions. Based on the tetrabenzene sodium potentiometric titration of barium, we further discussed the method of determining the sulfate radical in environmental water samples by the reverse drip method. The factors that affect the accuracy and precision of the results are discussed. This method can determine 62.5μg to 25mg sulfate. The method has good precision and good accuracy. When the content of sulfate ion is 1.274mg, the coefficient of variation is 0.3%