提出了用螯合滴定法测定矿石试样中的锡，用以取代铝片还原碘量法。
Methods Tannin was extracted by the ultrasonic technology and content of tannin was determined by the method of complex titration.
提出了用螯合滴定法测定矿石试样中的锡，用以取代铝片还原碘量法。
Methods Tannin was extracted by the ultrasonic technology and content of tannin was determined by the method of complex titration.
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