1. When nitric acid is poured on copper, a brown vapor gives off.
   将硝酸倒在铜上, 会散发出一种棕色的蒸气。
2. Technology of nuclear fuel cycle.Determination of neptunium in nitric acid solutions by molecular absorption spectrophotometry.
   核能.核燃料循环技术.分子吸收分光光度法测定硝酸溶液中的镎Nuclear energy.
3. Corrosively medium for chemical production such as sodium hydrate,caustic soda,sulfuric acid,nitric acid,acetic acid,fatty acid.
   化工生产品中的腐蚀性物料，如：烧碱、纯碱、浓稀硫酸、碳酸、醋酸等。
4. The ore sample was dissolved in nitric acid.After enrichment and separation with Xanthic ester cotton,the silver was determined by thiocyanometry.
   该方法采用硝酸溶解样品,黄原酯棉富集分离,以硫氰酸盐滴定法进行测定。
5. This article introduces that using mixed acid of nitric acid and sulfuric acid, beet waste-slag produces industrial product oxalic acid by ordinary pressure hydrocarbonylation.
   本文介绍利用硝硫混酸常压氧化法，把甜菜废渣制成工业品草酸。
6. The selective oxidation of ethers by chromic reagent, peroxide, nitric acid, oxygen and ozonide, as well as the ethers anodic oxidation are particularly introduced.
   主要介绍了铬(Ⅵ)类试剂,过氧化物、硝酸、氧和臭氧等各类氧化剂对醚选择性氧化以及醚的阳极电氧化研究状况。
7. The indium sesquioxide with over 99% purity can be prepared by a decomposition of nitric acid. The method was characterized by fewer equipments, simple operation, low cost and quick yield.
   采用硝酸分解法可制取纯度高于99%的三氧化二铟.本法具有设备少、操作简单、成本低、见效快等优点.

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