共查询到20条相似文献，搜索用时 78 毫秒
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在酸性溶液中,高锰酸钾可直接氧化安乃近,产生很强的化学发光,由此建立了一各测定安乃近的流动注射化学发光分析法．方法的检出限为3．1×10-8g／mL,相对标准偏差为1．8％（6．0×10－6g／mL安乃近,n＝11）,线性范围为1．0×10－7～1．0×10-4g／mL,此法已用于安乃近针剂和片剂中安乃近含量的测定．并对该反应的机理进行了探讨． 相似文献
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流动注射化学发光法测定盐酸利多卡因 总被引：1，自引：0，他引：1
在碱性介质中,当把鲁米诺和KMnO4的混合溶液注入到盐酸利多卡因溶液中时,会产生很强的化学发光现象．由此结合流动注射技术,建立了测定盐酸利多卡因的流动注射化学发光新方法．在优化的实验条件下,测定盐酸利多卡因的线形范围为1．0×10^-7～1．0×10^-5g／mL,检出限（3or）为4×10^-8g／mL,对1．0 ×10^-6g／mL的盐酸利多卡因进行11次平行测定,其相对标准偏差为0．25％．该方法已用于盐酸利多卡因注射液中盐酸利多卡因的测定． 相似文献
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提出了异烟肼一次氯酸钠化学发光新体系．结合流动注射技术，建立了一种新的测定异烟肼的流动注射化学发光新方法．该法选择性较好，操作简单，精密度好试剂易得．异烟肼在1．0×10－6～1．0×10－4g·ml－1浓度范围内与化学发光信号强度呈线性关系．检出限为2．7×10－7g·ml-1．RSD=2．4％（n＝11；Cs=5．0×10－6g·ml－1）． 相似文献
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流动注射化学发光法测定L-色氨酸 总被引：1，自引：0，他引：1
在酸性溶液中 ,高锰酸钾能氧化L_色氨酸产生化学发光反应 ,甲醛的存在可使化学发光强度增强 .据此 ,采用流动注射技术 ,建立了一种测定L_色氨酸的化学发光分析法 .方法的检出限为 3 5× 10 - 8g/mL ,相对标准偏差为 1 8% (1 0× 10 - 6 g/mLL_色氨酸 ,n =11) ,线性范围为 1 0× 10 - 7～ 6 0× 10 - 6 g/mL 相似文献
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流动注射化学发光法测定芦丁 总被引：2，自引：0，他引：2
提出使用芦丁增强KMnO4-NaOH化学发光体系,结合流动注射分析技术进行芦丁的测定.本法选择性好、灵敏度高.芦丁在1 0×10-7～5 0×10-5g/mL浓度范围内与化学发光分析信号呈线性关系;检出限为7×10-8g/mL;对5 0×10-6g/mL的芦丁进行11次连续测定,相对标准偏差为2 5%.方法已成功地应用于片剂中芦丁含量的测定. 相似文献
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基于光泽精在碱性条件下可以被过氧化氢氧化产生化学发光,结合流动注射技术建立了一种直接测定呋喃西林的流动注射化学发光新方法．该方法的最佳测定条件：H2O2的浓度为0．020mol／L,NaOH的最佳浓度为0．080mol／L,光泽精浓度为1．0×10^7mol／L,负高压为800V,蠕动泵主泵运行10s后副泵运行30s,接着主泵继续转动10s,副泵30s,如此循环．线性范围0．0100～0．100pug／mL和1．00～10．0p,g／mL,检出限为0．00800p,g／mL,对0．100μg／mL的呋喃西林连续进行110C平行测定,其相对标准偏差为3．70％,该法已成功测定了三种不同浓度呋喃西林精粉的含量,其相对标准偏差分别为3．03％、1．60％、2．04％,平均回收率在95．8％-101．2％之间． 相似文献
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基于在NaOH碱性介质中,铁氰化钾可以直接氧化芦丁和槲皮素产生强的化学发光这一现象,在Hypersil ODS色谱柱上,以乙醇-0.01%醋酸铵(体积比)=2:1为流动相的条件下,实现了对芦丁和槲皮素的分离测定,建立了测定芦丁和槲皮素的方法。该法简单、灵敏度高、选择性好,可用于检测红花中的芦丁和槲皮素。芦丁和槲皮素浓度在2.0×10-7g/mL～2.5×10-5g/mL和5.1×10-7g/mL～1.3×10-4g/mL范围内与化学发光强度呈良好的线性关系,检出限(3δ)为1.20×10-8g/mL和2.50×10-8g/mL。对浓度为5.0×10-6g/mL的芦丁和槲皮素溶液进行6次平行测定,相对标准偏差(RSD)为1.4%、2.3%。用于红花中芦丁和槲皮素的同时测定,结果令人满意。 相似文献
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聂峰 《陕西理工学院学报(社会科学版)》2003,21(3):56-59
利用建立的NaIO4-H+-H2O2-VB2化学发光新体系,结合流动注射技术建立起一种测定维生素B2的化学发光新方法.方法的线性范围为1.0×10-7～5.0×10-5g/mLVB2;检出限为2.7×10-8g/mL;相对标准偏差(RSD)为2.3%(Cs=1.0×10-6g/mLVB2,n=11). 相似文献
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建立了 HPLC 法同时测定舒泌通胶囊中绿原酸和蒙花苷的质量分数,采用 SunfireTM-C18柱（4．6 mm ×250 mm,5μm）,柱温为30℃,流动相 A 为甲醇、B 为0．5％冰醋酸,梯度洗脱,流速为1．0 mL／min,检测波长为328 nm．结果表明,二者的线性范围分别为1．0804～216．0804μg／mL 和1．0804～81．7200μg／mL．平均回收率分别为101．0％和9．3％,RSD 分别为3．4％和3．3％（n ＝9）．该方法准确、可靠,具有良好的重复性和稳定性,可用于舒泌通胶囊中绿原酸和蒙苷花的质量分数测定． 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Rajesh Kanoi 《海外英语》2007,(1):52
Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer. 相似文献