Passivation with nitric acid is required after an oxalic acid rinse.
用草酸冲洗后，必须要用硝酸钝化。
Test specimen shall be dissolved with alkali, Then treated with nitric acid.
试样用碱溶解后，用硝酸酸化。
The aluminum alloy specimens are fused with sodium hydroxide and are acidized with nitric acid.
铝合金样品用氢氧化钠分解，硝酸酸化。
The macro-kinetics characteristics of decomposition of witherite with nitric acid in a batch reactor are studied.
对铝酸钠溶液中析出一水软铝石过程的宏观动力学进行了研究。
The gold in blister copper sample was pretreated with nitric acid - sulphuric acid to remove copper, digested with aqua , and determined by flame atom absorbance spectrometry.
摘要本文建立了用硝酸硫酸预处理除去大量的铜，王水溶解，火焰原子吸收法测定粗铜中金的分析方法。
Methods: After a pretreatment with nitric acid or perchloric acid wet digestion, we used atomic fluorescence spectrometer methodology to detect selenium in human serum and urine.
方法：采用硝酸、高氯酸对尿样及血清进行湿法消解，利用原子荧光光谱法测定其中的硒含量。
It was thought that the new process for producing glyoxal by oxidizing acetaldehyde with nitric acid should be developed inland, and the urgent task was increasing yield and quality.
认为国内应大力开发乙醛硝酸氧化法生产乙二醛的工艺，目前的迫切任务是提高产量与产品质量。
The experiments have shown that the technology of oxidation degradation with nitric acid and sulfoxidation with sodium sulphite to produce water-reducer of cement with decomposed coal is available.
大量实验证明以风化煤为原料采用硝酸氧化降解后再磺化的方法生产混凝土减水剂的工艺是合理的。
Dissolving sample with nitric acid and hydrofluoric acid, the silicon content of silicon-manganese alloy was made a measurement with ICP-AES method in the hydrofluoric acid-resistant spray devices.
用硝酸和氢氟酸溶解试样，采用耐氢氟酸雾化装置，用ICP - AES法测定硅锰合金中的硅。
Because nitric acid is a corrosive chemical, extreme care must be used with handling, storage, and use.
由于硝酸是腐蚀性的化学试剂，在装卸、存储和使用时必须小心谨慎。
Organo mineral compound fertilizers are digested with sulfuric acid hydrogen peroxide and nitric acid perchloric acid respectively and then their total potassium content is determined.
用硫酸—过氧化氢和硝酸—高氯酸分别对有机—无机复混肥料进行消化处理，然后进行总钾含量的测定。
Latex industrial gloves, apply only to weak acid concentration is not high sulfuric acid and various salts, have no contact with strong oxidizing acids (nitric acid, etc.).
乳胶工业手套只适用于弱酸，浓度不高的硫酸和各种盐类，不得接触强氧化酸(硝酸等)。
Oxalic acid was obtained by treating buckwheat husks with dilute nitric acid.
荞麦皮经稀硝酸处理后，从滤液中得到一种透明的针状晶体。
The catalytic stability and activity of supported palladium in hydrodechlorination were improved when the activated carbon supports were pretreated with concentrated nitric acid.
活性炭载体经浓硝酸氧化处理后能明显提高负载型钯催化剂的催化活性和催化稳定性。
The indium sesquioxide with over 99% purity can be prepared by a decomposition of nitric acid.
采用硝酸分解法可制取纯度高于99%的三氧化二铟。
Methods Activities of acid phosphatase (ACP), lactate dehydrogenase (LDH) and nitric oxide synthase (NOS) in homogenate of the testis were determined with spectrophotometry.
方法用分光光度法检测睾丸组织匀浆中酸性磷酸酶(A CP)、乳酸脱氢酶(LDH)和一氧化氮合成酶(NOS)的活性。
Nitric acid forms hydrates with water.
硝酸与水形成水合物。
The polymerization of acrylonitrile in aqueous nitric acid solution with sodium nitrite as initiator has been studied.
研究了亚硝酸钠引发硝酸溶液中丙烯腈的聚合反应。
The results show that nitrate accumulation will not increase with the increase of temperature mainly due to the inhibition of free nitric acid when temperatures reach a certain level.
试验结果表明：当温度达到一定条件时，亚硝酸氮的积累不再随温度升高而增加的主要原因是游离亚硝酸的抑制作用。
Conclusion Rapid decalcification with microwave and nitric acid at low temperature could get very satisfactory staining results within relatively short time.
结论低温微波硝酸快速脱钙能在短时间内获得满意的染色效果。
It is formed by reacting nitric acid with a calcium salt (oxide, carbonate or hydroxide).
由硝酸与钙盐(氧化物，碳酸盐或氢氧化物)反应生成。
Catalytic nitration of toluene occurs by use of nitric acid in the presence of bentonite metal nitrates with useful para selectivities, up to a para to ortho ratio 1.0.
在皂土硝酸盐催化下，甲苯能被浓硝酸对位选择性硝化，对邻硝化产物比率达1．0以上。
Conclusion Very satisfactory staining results within relatively short time may be obtained with microwave treatment in nitric acid solation at low temperature for decalcification.
结论低温微波硝酸脱钙能够在较短时间内获得满意的染色效果。
Organo mineral compound fertilizers are digested with sulfuric acid hydrogen peroxide and nitric acid perchloric acid, respectively, and then their total potassium content is determined.
用硫酸—过氧化氢和硝酸—高氯酸分别对有机—无机复混肥料进行消化处理，然后进行总钾含量的测定。
Aliphatic hydrocarbons can be nitrated even with 13% nitric acid.
脂肪酸甚至能被13的硝酸硝化。
Methods: the sample, after the nitric acid and the perchloric acid digestion was induced in the flame atom absorption spectrophotometer with standard series comparison quota.
方法：样品用硝酸和高氯酸消化后，导入火焰原子吸收分光光度计中，与标准系列比较定量。
The soluble multi walled carbon nanotube (MWNT) is prepared by heating the mixture of original MWNT with concentrated nitric acid.
用加热多壁碳管与浓硝酸混合物的方法制备了可溶性的多壁碳管。
Oxalic acid was obtained by treating buckwheat husks with dilute nitric acid. Its structure was confirmed with ea, ir and MS analysis.
荞麦皮经稀硝酸处理后，从滤液中得到一种透明的针状晶体。该晶体经元素分析、红外光谱及质谱测定，确认为草酸。
Phenols and anilides can be nitrated with very dilute nitric acid.
酚类和酰基苯胺能被极稀的硝酸硝化。
Phenols and anilides can be nitrated with very dilute nitric acid.
酚类和酰基苯胺能被极稀的硝酸硝化。
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