The excess tin chloride addition produces black mercury precipitation and is about to seriously affect the determination of iron by using potassium chromate volumetric analysis method.
重铬酸钾容量法测铁中，二氯化锡超量产生黑色汞沉淀，严重影响测定。
A soft electromagnetic shielding fabric was successfully prepared by electroplating tin-nickel alloy on the Cu-plated PET fabric in potassium pyrophosphate system.
本文研究了在化学镀铜的聚酯纤维织物表面采用焦磷酸盐体系电沉积锡镍合金的工艺条件以及合金镀层织物的性能。
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