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催化分光光度法

催化分光光度法的相关文献在1991年到2020年内共计127篇,主要集中在化学、预防医学、卫生学、轻工业、手工业 等领域,其中期刊论文121篇、会议论文6篇、专利文献319515篇;相关期刊74种,包括广东微量元素科学、辽宁石油化工大学学报、岩矿测试等; 相关会议6种,包括第十一届全国勘查地球化学学术讨论会、第五届全国博士生会议暨环境科学与工程新理论、新技术学术研讨会、河南省第四届青年学术年会等;催化分光光度法的相关文献由254位作者贡献,包括刘锡林、李欣、寇宗燕等。

催化分光光度法—发文量

期刊论文>

论文:121 占比:0.04%

会议论文>

论文:6 占比:0.00%

专利文献>

论文:319515 占比:99.96%

总计:319642篇

催化分光光度法—发文趋势图

催化分光光度法

-研究学者

  • 刘锡林
  • 李欣
  • 寇宗燕
  • 王晓菊
  • 徐其亨
  • 陈立仁
  • 刘利平
  • 刘立行
  • 周之荣
  • 寇明泽
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 贾亮亮; 尹红云
    • 摘要: 旨在优化以催化分光光度法定量分析水体中微量碘的分析体系。在醋酸盐缓冲溶液体系中,碘催化4,4′-四甲基二氨基-二苯基甲烷与氯胺T发生氧化反应,生成蓝色配合物,通过测试该配合物的吸光度可定量分析水体中的碘。优化了分析体系中的测定波长、缓冲溶液的用量、显色剂的用量、氯胺T的浓度等实验条件。在优化的实验条件下,分光光度法的微量碘测定结果的相对标准偏差为2.1%,检出限为0.1μg/L。方法选择性好、操作简便、成本低、灵敏度高,满足水文地质工作对水中微量碘含量普查的要求。
    • 涂杰; 王照丽; 赖承钺; 张新申
    • 摘要: A new flow injection analysis coupling with catalytic dynamics spectrophotometry for simple and rapid determination method of trace cationic surfactants(CSs)in water environment is proposed,which is based on the markedly catalytic action of cat-ionic surfactants,such as cetyltrimethylammonium bromide(CTMAB),on oxidation discoloration of Arsenazo(Ⅲ)using KBrO3in the high acidic phosphoric acid solution.Under the optimum conditions,The linear range for CTMAB is 8~5000 μg·L-1and every relative coefficient of CTMAB in different parts of the linear ranges is 0.9996 or more(n=13).The detection limits(3σ)of CTMAB is 6.0μg·L-1,and the recovery percentages range from 96.4%to 102.1%.The relative standard deviation(RSD)is 1.76%for 500 μg·L-1CTMAB added in river water(n=14).The proposed method has high sensitivity and veracity,and was applied successfully to the determination of CSs at ug·L-1levels in surrounding water,living waste water and leather waste water samples with satisfac-tory results.%在磷酸溶液中,阳离子表面活性剂十六烷基三甲基溴化铵(CTMAB)能显著催化溴酸钾氧化偶氮胂Ⅲ褪色.基于此,结合流动注射技术,建立了催化动力学光度法快速、简便测定水环境中痕量阳离子表面活性剂新方法.在优化的实验条件下,线性范围为8 ~5000 μg·L-1(相关系数 r≥ 0.9996,n=13),检出限(3σ)为6.0μg·L-1,回收率为96.4~102.1%,相对标准偏差(RSD)为1.76%(500 μg·L-1的CTMAB添加于河水水样,n=14).该法具有较高的灵敏度和准确度,用于环境水样、生活污水及皮革废水中痕量阳离子表面活性剂的检测,结果令人满意.
    • 李俊洁
    • 摘要: 本文用强酸阳离子交换树脂除去盐湖卤水中阳离子干扰,再采用氯胺T-四碱(4,4-四甲基二氨基苯甲烷)催化分光光度法测定卤水中的碘,在酸性介质中,碘离子与四碱和氯胺T氧化反应中的催化作用,生成有色的络和物,以有色络和物的最大吸收值计算结果.操作简单快速,检出限低,灵敏度高,精密度好.
    • 乐淑葵
    • 摘要: 在25 mL反应体系中加入3.0mL硫酸(1.0 mol/L)-盐酸(5.0 mol/L)混合酸,3.0mL碘酸钾溶液(0.05 mol/L),1.5 mL胭脂红溶液(0.50 g/L),微量镓对碘酸钾氧化胭脂红的褪色反应有良好的催化作用,为此建立了测定地质样品中微量镓的催化分光光度法.方法的线性范围在0~100 μg/L,工作曲线的线性方程△A=2.369Ca+0.223 6(相关系数r=0.999 6),检出限(3S/N)为1.0×10-3μg/mL.方法应用于地质标准样品中微量镓的测定(分别是岩石标准样品GBW07120和水系沉积物标准样品GBW07301a),测定值与认定值相符,测定值相对标准偏差(n=6)均小于5%,结果满意.
    • 牛娜; 闫红岭; 陈浩凤; 刘春霞; 张明炜; 王琳
    • 摘要: 对碱熔-催化光度法测定碳酸盐岩中的Os、Ru进行了研究。结果表明,在过氧化钠熔融物料时,加入酸性熔剂硼砂和二氧化硅,可以增加熔融体的流动性,消耗过量的过氧化钠,避免了熔融物在后恋硫酸酸化时产生大量过氧化氢,使蒸馏氧化剂K2Cr2O7被还原而失去氧化性,有利于溶液中Os、Ru的完全氧化蒸馏分离。解决了催化光度法测定碳酸盐岩中Os、Ru测定结果偏低、不准确的问题。测定Os、Ru检出限(3σ)分别达到0.0192、0.0194 ng/g,精密度(RSD,n=12)分别为4.75%~15.2%、4.22%~13.9%,准确度(RE)分别为-3.12%~+3.33%、-8.45%~+4.54%。方法可满足地球化学调查样品分析质量要求。%The determination of osmium and ruthenium in carbonate rocks was investigated by the alkali fusion-catalytic spectrophotometry. The results showed that the addition of acidic rholite like borax and silicon dioxide when carbonate material was being melted by sodium peroxide could increase the mobility of the molten body, facilitate the consumption of an excessive amount of sodium peroxide and avoid large amounts of hydrogen peroxide produced by the melt after acidification with sulfuric acid. With the addition of acidic rholite, K2Cr2O7 was reduced and lost the oxidizing potency, so that osmium and ruthenium in the solution could be fully oxidized, distilled and separated. The detection limit (3σ) was 0.0192 ng/g for Os and 0.0194 ng/g for Ru. The precisionRSD (n=12) was 4.75%~15.2% for Os and 4.75%~13.9% for Ru. The accuracy (RE) was -3.12%~+3.33% for Os and -8.45%~+4.54% for Ru. The method can be applied to analysis of the samples from the geochemical survey.
    • 柏林洋; 蔡照胜
    • 摘要: In H2 SO4 solution,the oxidative fading reaction of potassium bromate was catalyzed by nitrite. Based on this reaction,a catalytic spectrophotometric method for the determination of trace amount of nitrite was proposed.The optimized conditions were as follows:① amount of 1.0 mol·L-1 H2 SO4 solution:1.8 mL;②amount of 3 ×10-4 mol·L-1 aniline blue solution:1.5 mL;③ amount of 0.02 mol·L-1 potassium bromate solution:1.1 mL;④ temperature of reaction:30 °C.The linearity were in the ranges of 0.01-0.2 mg·L-1 and 0.2-1.0 mg·L-1 with detection limit (3s/k)of 4.6 ×10-6 g·L-1 .The proposed method was applied to the analysis of water sample,giving values of recovery and RSD′s (n=6)in the ranges of 96.0%-104% and 1.6%-2.3% respectively.%在硫酸介质中,亚硝酸盐对溴酸钾氧化苯胺蓝褪色反应有明显的催化作用,据此提出了测定痕量亚硝酸盐催化分光光度方法。优化的试验条件如下:①1.0 mol·L-1硫酸溶液的用量为1.8 mL;②3×10-4 mol·L-1苯胺蓝溶液用量为1.5 mL;③0.02 mol·L-1溴酸钾溶液用量为1.1 mL;④反应温度为30°C。该方法的线性范围分别为0.01~0.2 mg·L-1和0.2~1.0 mg· L-1,检出限(3s/k)为4.6×10-6 g·L-1。方法用于水样的分析,回收率在96.0%~104%之间,测定值的相对标准偏差(n=6)在1.6%~2.3%之间。
    • 来新泽; 王琳; 牛娜; 王敏捷; 来克冰
    • 摘要: By developing a new type mixed oxidant of Os and Ru, K2Cr2O7-NaBrO3 and diluent As2O3-H2SO4 of Os, the full procedure blank in the determination of Ru and Os by alkali fusion distillation separation-catalytic spectro-photometric method was reduced, and the sensitivities of Os, Ru in As3+-Ce4+catalytic system were improved. The stability of the method was improved and the detection limit was reduced by prolonging the reaction time at 35°C. Detected limits (3σ) of Os and Ru were 0.010 ng/g and 0.012 ng/g, respectively. The results showed that the safety and efficiency of distillation were greatly improved by improve the distillation device. The method is simple operation, high efficiency and low cost. The method was applied to measure Os and Ru in National PGE geochemistry standard substance. The relative error (RE) was-18.0%~+4.40%, and the relative standard deviation (RSD) of 12-times results was less than 20.1%. The method could meet the analysis quality requirements of geochemical survey sample.%研制了新型的锇、钌混合氧化剂K2Cr2O7-NaBrO3和锇稀释剂As2O3-H2SO4,能够降低碱熔蒸馏分离-催化分光光度法测定锇、钌的全流程空白,提高了锇、钌催化 As3+-Ce4+体系的灵敏度。在35°C时,通过延长反应时间,提高了方法的稳定性和降低方法的检测下线。使Os、Ru检出限(3σ)分别达到0.010 ng/g和0.012 ng/g。改进后的蒸馏装置使锇、钌蒸馏的安全性和工作效率极大提高。方法操作简便、效率高、成本低。测定国家铂族元素地球化学一级标准物质中的 Os、Ru,相对误差(RE)为-18.0%~+4.40%,12次测定的相对标准偏差(RSD)均小于20.1%,满足地球化学调查杨品分析质量要求。
    • 陈韵伊; 梁军; 李萍; 吴代赦
    • 摘要: 设计、建立了测定空气中碘的含量与形态分布的采样装置与采样方法.设计制作了采样切割器,空气依次通过切割器中的玻璃纤维滤膜、浸渍NaOH溶液的玻璃纤维滤膜、浸渍四丁基氢氧化胺(TBAH)溶液的玻璃纤维滤膜、上覆活性炭的玻璃纤维滤膜,以分别捕集颗粒态碘、HI和I2、HOI、有机结合态碘.经优化选择,浸渍液NaOH的质量分数为10%、浸渍液TBAH的质量分数为20%、上覆活性炭的质量为0.4g.采用高温热水解法处理捕集碘之后的滤膜,并用砷铈催化分光光度法分析热水解吸收液中的碘含量.由于采样切割器制作简单,仅使用常见、便宜的分析仪器,故该方法易于推广使用,适合空气中碘的含量与形态分布的日常监测.
    • 杨风霞; 荆瑞俊; 王婷
    • 摘要: In a H2SO4 medium and in the presence of SDS, color-fading of methylene blue by oxidation with KBrQ; was catalyzed by NO2- , and the sensitivity of the color-fading reaction was found higher than that of the reaction in the absence of SDS. Based on these facts, a micelle-sensitized catalytic spectrophotometric method for determination of trace amount of nitrite was proposed. Linear relationship between the magnitude of decrease in absorbance (AA) and mass concentration of nitrite was obtained in the range of 0. 02—1. 0 mg · L-1 , with detection limit (3s/k) of 0. 074 mg · L-1. In the determination of trace amount of nitrite in sausage sample by the proposed method, values of recovery found by standard addition method were in the range from 98. 8% to 103%, with values of RSD's (n=5) in the range of 1. 9%—2. 4%.%在硫酸介质和表面活性剂十二烷基硫酸钠(SDS)存在下,亚硝酸根对溴酸钾氧化亚甲基蓝的褪色反应具有催化作用,并且由于添加了SDS,体系的灵敏度明显提高,据此提出了测定痕量亚硝酸根的方法.亚硝酸根的质量浓度在0.02~1.0 mg·L-1范围内与△A呈线性关系,方法的检出限(3s/k)为0.074mg·L-1.方法用于火腿肠中痕量亚硝酸根的测定,并做回收试验,测得回收率在98.8%~103%之间,测定值的相对标准偏差(n=5)在1.9%~2.4%之间.
    • 武丽平; 袁红战; 祝云军
    • 摘要: 目前衡量古海洋生产力的指标都存在一定的局限性,本文提出将溴元素作为研究古海洋生产力的新指标,建立了海相碳酸盐岩的分解方法以及其中溴元素的测定方法,即热水解-分光光度法.采用热水解方法对海相碳酸盐岩样品进行分解,吸收液充分吸收其释放出的溴,分光光度法检测样品中溴元素的含量.试验确定了热水解的最佳条件和分光光度检测的最佳波长,实际样品加标回收率为97.5% ~ 101.6%,相对标准偏差为1.2%~3.6%(n=10).本方法的样品分解时间较短,能很好地实现溴与基体组分分离,且所需仪器均为比较常见的仪器,操作简单,成本低廉,适合于海相碳酸盐岩样品的批量分解和元素测定.%It is very important to research the primary productive forces of the ancient sea in order to attempt to find a solution for the current energy and climate problems. At present, all of the proxies to estimate the primary productive forces of the sea have certain limitations. In this paper, a new proxy of Br is introduced and the description of establishing a new method for Pyrohydrolysis-Catalytic Spectrophotometry to digest marine carbonate rock and determine Br. The Permian marine carbonate rocks were decomposed by pyrohydrolysis, the Br was trapped by NaOH solution (0. 1%) and measured by Catalytic Spectrophotometry. The optimal experimental conditions for pyrohydrolysis and the optimal wave length for Catalytic Spectrophotometry are described. The recovery rates were in the range of 97. 5% -101.6% with RSD ( n = 10 ) from 1.2% to 3. 6% . This experimental technique is highly suitable for marine carbonate rock samples due to its use of commonly available equipment, simple operation, short operational process and low cost.
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