目前使用碱熔高温炉法分解磷矿石试样，费时、成本高且耗电量大。
The decomposition of phosphate rock sample by alkali fusion in muffle furnace takes more time, electricity and higher cost.
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.
锡矿石试样的还原分解，在测定的准确性、结果的重现性、操作的简易程度以及分析的速度等方面，均优于经典的过氧化钠熔矿方法。
The reductive decomposition method has the advantages over the classic ore melting method with sodium peroxide in analytical accuracy, reproducibility, ease of operation and rate of analysis, etc.
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