Methods:After decompounded the sample by nitric acid, then to detect using both flame and graphite oven atomic absorption spectrophotometer.
方法：将样品经硝酸分解后，采用火焰原子吸收法和石墨炉原子吸收法分析测定。
The results showed that HF acid has remarkable deashing capacity for coal and graphite with high Si and low Ca content.
结果表明，HF酸对高硅低钙含量的煤和石墨有显著的脱灰效果；
The application of ferreous synthetic furnace, triad graphite synthetic furnace and diad graphite synthetic furnace in the production of high purity hydrochloric acid is compared.
对铁合成炉、三合一石墨合成炉、二合一石墨合成炉在高纯盐酸生产中的应用情况进行了对比。
Methods: Pretest samples using mixed acid, and magnesium was adopted as matrix modifier to determine by graphite furnace atomic absorption spectrometry.
方法：利用混合酸对样品进行消化处理，镁作为基体改进剂，石墨炉原子吸收光谱法测定。
Study on preparation of sulphur-free expanded graphite was made using nitric acid and phosphoric acid as steep in strong oxidizing environment.
以硝酸、磷酸为浸泡剂，在强氧化剂的作用下，对无硫膨胀石墨的制备进行了初步研究。
The operation to heat acid to reduce consumption of acid with graphite heat exchanger in Cold-Rolling Workshop, No. 1 Rolling Plant of Xuanhua Iron and Steel Company is introduced.
介绍了宣化钢铁公司第一轧钢厂冷轧车间利用石墨换热器对酸实施加热降低酸耗的情况。
The utility model relates to a graphite hydrochloric acid synthesis furnace used for producing high-purity hydrochloric acid or food-class hydrochloric acid.
本实用新型涉及一种生产高纯盐酸或食品级盐酸的石墨盐酸合成炉。
It was testified that expandable graphite was a kind of effective catalyst in the esterification of acetic acid with isoamyl alcohol.
有人作证说，膨胀石墨是一种有效的催化剂在乙酸与异戊醇的酯化反应。
It was testified that expandable graphite was a kind of effective catalyst in the esterification of acetic acid with isoamyl alcohol.
有人作证说，膨胀石墨是一种有效的催化剂在乙酸与异戊醇的酯化反应。
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