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1. A brief review of the assay processes of liquorice root is made. 2. After investigating the more important stages in the processes of Houseman and Fahmy, the following improvements are made to obtain a more complete separation of glycyrrhizic acid: (1) duration for the precipitation of glycyrrhizic acid is prolonged from 2-fe- hours employed by Houseman to 24 hours; (2) concentration of the sulphuric acid usad for the precipitation of glycyrrhizic acid is changed from 0.3 per cent employed by Houseman to...

1. A brief review of the assay processes of liquorice root is made. 2. After investigating the more important stages in the processes of Houseman and Fahmy, the following improvements are made to obtain a more complete separation of glycyrrhizic acid: (1) duration for the precipitation of glycyrrhizic acid is prolonged from 2-fe- hours employed by Houseman to 24 hours; (2) concentration of the sulphuric acid usad for the precipitation of glycyrrhizic acid is changed from 0.3 per cent employed by Houseman to 1.4 per cent; (3) temperature for the precipitation of glycyrrhizic acid is lowered from room temperature employed by Fahmy to 6-7°C. 3. Benedict's quantitative solution is used in place of Fehling's solution in the titration of reducing sugars, because the former solution is more stable and has better keeping properties. 4. An improved process for the assay of liquorice root is described. Five samples of Chinese liquorice root have been assayed by this method. The results obtained are as follows: water-soluble extractives, 26.17—35.59 per cent; glycyrrhizic acid 5.49—10.04 per cent; total reducing sugars, 4.70—10.97 per cent; starch and gummy matter, 4.17—5.92 per cent; water, 8.04—8.93 per cent; ash, 3.06—4.24 per cent; acid-insoluble ash, 0.25—0.65 per cent. The above results showed that the samples assayed fully conform with the requirements of the pharmacopoeias of most countries.

1.本文简述了前人分析甘草成分所用的方法,並對Houseman氏及Fahmy氏所用方法的主要步驟進行了比較研究,改進了他們的操作方法. 2.為了便利更完全地分離甘草根中所含的甘草酸,我們進行了下列修改:(1)將Houseman氏沉澱甘草酸的時間由2.5小時延長至24小時;(9)將Houseman氏沉澱甘草酸時所用的硫酸濃度由0.3%提高至1.4%;(3)將Fahmy氏沉澱甘草酸時的温度由常温降低至6—7C°. 4.由於非林氏試液很不穩定,應用、貯存均感不便,故採用班乃第氏定量試液.用轉化後的糖液滴定一定量的班乃第定量試液,以测定總還原糖量. 6.本文報告了對五種国產甘草成分分析的結果;水溶物26.17—35.59%,甘草酸5.49—10.04%,總還原糖4.70—10.97%,澱粉及膠質4.17—5.92%,水分8.04—8.93%,灰分3.06—4.24%,酸不溶性灰分0.25—0.65%.並證明上述樣品完全符合於中、蘇、英、日、各国藥典規定的甘草品質標準.

Various procedures for spectrographic analysis of metallurgical slags have been found inthe literature,but,in practice,results are often influenced by the chemical nature of the samples.This paper reports some results obtained on the spectrographic analysis of open-hearth slags bythe copper cup-electrode solution method.An activated a.c.arc (ПС-39) is used as light source.To the nitric acid solution ofslag samples is added stannous chloride (Sn as internal standard) and potassium bromide (Kfor the stablization...

Various procedures for spectrographic analysis of metallurgical slags have been found inthe literature,but,in practice,results are often influenced by the chemical nature of the samples.This paper reports some results obtained on the spectrographic analysis of open-hearth slags bythe copper cup-electrode solution method.An activated a.c.arc (ПС-39) is used as light source.To the nitric acid solution ofslag samples is added stannous chloride (Sn as internal standard) and potassium bromide (Kfor the stablization of the arcing).The prepared solution is then treated in a hot water-bath.The size and shape of the cup-electrode is so chosen that the height of the solution surface doesnot vary much during exposure.Because of the non-uniform distribution of the elements tobe analysed in the arc column,the slit is illuminated directly from the arc without using lenses.With fixed working curves we have obtained the lime-to-silica ratio of 20 slag samples.The differences between spectrographic and chemical values are less than ±5%.The completeanalysis of a few slag samples has been also carried out and the accuracy is found to be aboutthe same as those published in the literature.Causes for shifts of working curves in the course of experiments and means of prevention,and the problem of the dissolution of slags in nitric acid are discussed.Experiments indicatethat the turbulent effect of solution samples in the cup-electrode during arcing is advantageousand necessary.

本文叙述用杯形铜电极溶液法进行平炉渣光谱分析的一些结果。实验用ПС-39型交流电弧作光源,硝酸溶解渣样,加 SnCl_2(Sn 作内标)和 KBr(K 作燃烧稳定剂),并且把这溶液经过加热处理。再适当地选定了铜杯的大小和形状,和采用了直接照明系统。用固定定标曲线法作了20个渣样的硷度(Ca/Si)分析。与化学分析结果比较相差小于±5%。最后讨论了铜杯溶液法进行分析时定标曲线发生移动的原因和防止的方法,试样在硝酸溶液中溶解的问题,与试样溶液在燃烧过程中的翻腾现象。致谢:参加本项工作一部分的尚有周熙宁、徐升、王桢枢等同志,谨此致谢。

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這是一篇關於批评學中唯心主義觀點的論文,它批評了徐中同志在“建築與”(見天津大學學報四、五期)的主觀唯心主義觀點。論文分成兩個組成部分:一部分論証了不是感决定的存在,而是的存在産生感。指出徐文把客觀事物的其它屬性當成事物的屬性的不當,從而論證是客觀事物中一定對象的一種性質,而不是普遍存在於任何事物之中,離開事物本身的客觀屬性與標准,而從其它屬性(如實用)來認識,是一種主觀感覺决定客觀的存在的唯心主義。另一部分批評了徐文中的合於物質生活目的就是的反科學論點,從而指出事物並不是合於人們抽象的目的底東西就是的,事物的合目的性並不就是的客觀性,而且社會上的人是生存一定時間空間之内,在階級社會內,人们審觀點具有階級性,而徐文却完全忽視這一根本性的問题。本文是一篇批評論文,但限於作者本身水平,並不一定論證都是正確的,因此作者熱切地螹玫脚u與指正。

 
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