Repeat measurement of the melting point to verify the success of the recrystallization.
重复测定其熔点,以检查重结晶操作是否成功.
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It determines to be the structure of oxalic acid by IR spectrum and melting point.
以红外光谱及熔点确定了产物的结构.
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But the melting point of zinc is about 420℃ a nd it's vaporating point is 906℃.
但锌的熔点约为420℃挥发温度为906℃不利于焊接.
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Tr ait: red crystalline powder, acetone soluble, water fast , melting point greater than 145 ℃.
性状: 红色结晶粉末, 溶于丙酮,不溶于水, 熔点大于145℃.
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由差热分析曲线测得了它们的熔点和分解温度.
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RESULTS Chemical structure of the product was confirmed by melting point and element analysis.
结果所得产物经熔点测定、元素分析确证其结构.
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Flux is a low melting point glass, is lead oxide and boron silicate glass.
助熔剂为矮熔不背玻璃, 多见的有氧化铅和硼硅酸盐解的玻璃.
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Fused silica is an excellent glass But expensive because of pure silica's very high melting point.
熔硅玻璃是极佳的玻璃,但由于纯硅的熔点很高,所以制造费用昂贵.
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Therefore how to product PES with ideal melting point are concerned by every production companies.
因此,如何获得理想的熔点及熔程是每一个生产厂家都非常关心的问题.
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The compositions and structure were characterized by melting point analysis, IR, MS, etc.
并采用熔点测定 、 红外光谱 、 质谱等分析手段对合成产物结构进行了表征.
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以得到制备低熔点共聚酯的最佳配方等一些工艺参数.
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Using oil and palm oiloil which have lower melting point oil can replace oil for frying.
选用一级棉籽油和棕榈油为原料,制成熔点较低的调和油,经实验证明,可以代替大豆油,用于普通煎炸操作.
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The apparatus is calibrated using appropriate substances of known melting point.
装置使用一个已知熔点的合适物质去校准.
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