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盐酸苯胺

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A new color-fading spectrophotometric method for determining trace amount of bromate was developed.

基于6mol/L盐酸介质中溴酸根氧化甲苯胺蓝的退色反应,建立了测定微量溴酸根的新的退色光度分析方法。

The total iron in iron ore was titrated by potassium permanganate standard solution with sodium diphenylamine sulfonate as indicator.

用HNO3-HF处理,硫-磷混酸溶解试样,在盐酸介质中,用二氯化锡-三氯化钛将Fe(上标 3+)还原为Fe(上标 2+),以二苯胺磺酸钠为指示剂,以高锰酸钾标准溶液滴定铁矿石中的全铁量。

In the presence of the combination of sulphuric and phosphoric acid, with sodium diphenylamine sulfonate as the indicator, standard solution of potassium dichromate was used to titrate total iron value.

试样以盐酸溶解后,在酸性介质中,先以氯化亚锡将三价铁大部分还原为二价,然后在钨酸钠指示下,再以三氯化钛将剩余的三价铁还原为二价,过量的三氯化钛以重铬酸钾氧化消除干扰,在硫磷混合酸存在下,以二苯胺磺酸钠为指示剂,用重铬酸钾标准溶液滴定全铁量。

In HCl medium, iodate oxidizes hydroxylammonium chloride to form nitrite, which can produce a red azo dye with the reaction of p nitroaniline and α naphthylamine.

基于碘酸根在稀盐酸介质中氧化盐酸羟胺产生亚硝酸根,而亚硝酸根和对硝基苯胺重氮化后可以与α-萘胺偶联产生红色偶氮染料,提出了分光光度法测定碘的新方法。

The effect of HCl doping process on the conductivity of polyaniline was investigated through orthogonal tests.

采用正交实验法研究盐酸掺杂工艺对导电聚苯胺电导率的影响。

Through the research on the determination of SO2 in white granulated sugar by pararosaniline hydrochloride method, the sources of uncertainty components were analyzed, and the individual uncertainty values were evaluated, the expanded uncertainty of the m

摘要通过对盐酸副玫瑰苯胺法测定白砂糖中二氧化硫的测定过程进行研究,分析了该法测定结果的不确定度分量及其来源,确定了各不确定度分量值,给出了该法的扩展不确定度。

Detection limits of improving GB/T 5009.34 method, pararosaniline hydrochloride spectrophotometric determination of sulfites in foods, is 1.00mg/kg.

本文首次报告用改进GB/T5009.34食品中亚硫酸盐盐酸副玫瑰苯胺法。

The method of using formaldehyde buffer solution a b sorption-hydrochloric pararosaniline spectrophotometry to determine sulfur diox ide in air has higher sensitivity and good selectivity,and prevents from adoptin g mercurial absorbent.But the conditions in lab are not well controlled,the v alue of reagent blank and standard curvilinear slope can't accord with the one s tipulated in"Methods for Air and Waste Gas Monitoring and Analysis".Some opra tional techniques for SO2 determination in lab are introduced for reference.

文摘:以甲醛缓冲溶液吸收-盐酸副玫瑰苯胺分光光度法测定空气中的二氧化硫,方法灵敏度高,选择性好,避免了使用含汞的吸收液,但如果实验条件控制不好,试剂空白值及标准曲线的斜率就会不符合《空气和废气监测分析方法》中规定的值,本文着重从操作技巧方面对二气化硫测定的实验室质量控制进行分析,仅供参考。

Through these we find the characterization of ammonium sulfate and aniline ratio, hydrochloride and perchlorate (HCLO4) concentration, polyvinylpyrrolidone and polyvinyl alcohol of Concentration on the morphology and conductivity polyaniline films have great impact.

通过这些表征我们发现过硫酸铵与苯胺摩尔比、盐酸和高氯酸(HCLO4)的浓度、聚乙烯吡咯烷酮和聚乙烯醇的浓度对聚苯胺薄膜形貌和电导率有很大的影响。

The synthesis of aniline from benzene and hydroxylamine hydrochloride in acetic acid–water media under mild conditions was also studied. Using NaVO3 as the catalyst, its catalytic performance in the amination was investigated in detail.

本文还采用盐酸羟胺为胺化剂,考察了温和条件下醋酸-水介质中苯与盐酸羟胺合成苯胺的反应。

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