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5-Br-PADAP

5-Br-PADAP的相关文献在1989年到2021年内共计174篇,主要集中在化学、化学工业、临床医学 等领域,其中期刊论文169篇、会议论文5篇、专利文献60999篇;相关期刊83种,包括内蒙古师范大学学报(自然科学汉文版)、广东微量元素科学、理化检验-化学分册等; 相关会议5种,包括第十三届全国分子光谱学学术会议、中国食品科学技术学会第三届学术年会、中国化学会第八届多元络合物应用学术会议等;5-Br-PADAP的相关文献由339位作者贡献,包括连国军、李东、吴丽香等。

5-Br-PADAP—发文量

期刊论文>

论文:169 占比:0.28%

会议论文>

论文:5 占比:0.01%

专利文献>

论文:60999 占比:99.72%

总计:61173篇

5-Br-PADAP—发文趋势图

5-Br-PADAP

-研究学者

  • 连国军
  • 李东
  • 吴丽香
  • 曹建明
  • 嘎日迪
  • 李宝青
  • 陈红
  • 黄晖
  • 张书圣
  • 吴哈申
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 徐博刚; 李景旺
    • 摘要: 目的:在光度分析显色剂或者络合滴定显色剂中,尤以在吡啶环上引入卤素的衍生物较为优越,同时溴代衍生物作为显色剂,具有较高的灵敏度.方法:本文主要讨论2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚,简称5-Br-PADAP,和2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚,简称3,5-di-Br-PADAP,这两种在该领域内最为重要的具有代表性意义的特效指示剂的合成方法.结论:以上两种溴代吡啶偶氮化合物中典型的特效指示剂,已经广泛应用于分光光度法分析检测、色谱分析法检测以及电化学分析法检测的应用,并具有更广泛的应用与使用精度的前景.
    • 段宁鑫; 王浩洋; 王孟乐; 包晓玉
    • 摘要: 用5-Br-PADAP-分光光度法对大米中微量锌进行了测定.以5-Br-PADAP为显色剂,Triton X-114为表面活性剂,在pH=8的硼酸-氢氧化钠缓冲溶液中,考察了显色剂用量、表面活性剂用量、缓冲液用量及pH等反应条件对测定结果的影响.实验结果表明:Zn2+与5-Br-PADAP形成1:2型络合物,其稳定常数为6.8×108,最大吸收波长为λ=560 nm,吸光度与锌浓度在0.01~0.60μg/mL范围内呈线性关系,其线性回归方程为A=2.046C+0.0161,相关系数R=0.9996,相对标准偏差为4.5%,加标回收率在91% ~96%之间.
    • 黄利强; 林茂; 王淑红
    • 摘要: 建立了一种快速、 准确测定水中镉含量的共振光散射(RLS)方法.在pH=9.0的氨-氯化铵缓冲介质及表面活性剂十二烷基硫酸钠(SDS)存在下,镉(II)与2-(5-溴-2-吡啶偶氮)-5-二乙氨基酚(5-Br-PADAP)可形成复合物,导致体系共振光散射强度显著增加,据此建立了利用共振光散射技术测定镉含量的分析方法.在优化条件下,依次加入0.40 mL的pH=9.0的NH3-NH4 Cl缓冲溶液,0.10 mL的1.0 mmol/L 5-Br-PADAP溶液,适量镉(II)标准使用液,以及0.40 mL的1.0 mmol/L SDS水溶液,并定容至10.0 mL,于室温下反应10 min,在最大散射峰604 nm处测定共振光的散射信号.结果表明,共振光散射强度与镉(II)质量浓度在5.3~200.0μg/L范围内呈线性关系,检出限(3Sd/K)为0.1μg/L.
    • 李姌; 王蒙; 杨亚玲
    • 摘要: 取经清洗、粉碎并烘干的样品0.500 0 g,用硝酸5 mL及过氧化氢3 mL,按程序升温模式微波消解.消解液于沸水浴中蒸发至约1 mL,用水定容至50 mL.取此溶液5.00 mL依次加入0.2g·L-15-Br-PADAP溶液2.0 mL,氨性缓冲溶液(pH 9.0)3.0 mL及100 g· L-1 Triton X-114溶液3.0 mL,加水定容至25 mL,摇匀,使Cd2+生成络合物,10 min后加入辛醇1.0 mL,涡旋混合1 min,离心5 min,吸出下层溶液,取出上层红色有机层,用乙醇定容至3 mL,于540 nm处用1 cm比色皿测得其吸光度.镉的质量浓度在10.00 mg·L-1以内与吸光度呈线性关系,检出限(3s)为0.05 mg· L-1.加标回收率为93.3%~103%,测定值的相对标准偏差(n=6)小于5.0%.%0.500 0 g of the cleaned,crushed and dried sample was digested with HNO3 (5 mL) and H2O2 (3 mL) in microwave oven under the mode of programmed temperature elevation.After digestion,the sample solution was evaporated to about 1 mL in boiling water bath,and then water was added to make up its volume to 50 mL.5.00 mL of the solution was taken and the following solutions were added in succession:① 0.2 g · L-1 5-Br-PADAP:2.0 mL;②ammoniacal buffer (pH 9.0):3.0 mL;and ③ 100 g · L-1 Triton X-114.:3.0 mL. Then the volume was made up to 25 mL with water and mixed thorough to have the colored complex of Cd2+ formed.After 10 min,1.0 mL of octyl alcohol was added and swirled for 1 min.After centrifugation for 5 min and phase separation,the lower phase was removed and the red colored upper phase was taken and made up its volume to 3 mL with ethyl alcohol.The absorbance of the red solution was measured at 540 nm.Linearity for Cd2+ was kept in the range within 10.00 mg · L-1,and the detection limit (3s) found was 0.05 mg · L-1.Values of recovery obtained by standard addition method were in the range of 93.3% to 103%.Values of RSDs (n=6) found were less than 5.0%.
    • 李佗; 杨军红; 翟通德; 李荣; 魏东
    • 摘要: 采用硫酸铵和硫酸溶解,在硫酸介质中选择5-Br-PADAP乙醇溶液作为显色剂,沸水浴10 min后,流水冷却至室温,在波长610 nm处进行测定,建立了5-Br-PADAP分光光度法测定锆合金中铌含量的分析方法.在最佳的分析条件下,铌质量浓度在0~0.8 μg/mL范围内与其吸光度呈线性关系,相关系数r=0.999 0,摩尔吸光系数ε=5.9×104 L/(mol·cm).按照实验方法测定锆合金中铌,结果的相对标准偏差(RSD,n=11)分别为2.9%和1.9%,并与电感耦合等离子体原子发射光谱法(ICP-AES)测定结果基本一致.%The zirconium alloy sample was dissolved with ammonium sulfate and sulfuric acid.The ethanol solution of 5-Br-PADAP was selected as coloring agent in sulfuric acid medium.After reaction in boiling water bath for 10 min, the solution was cooled to room temperature with flow water.The determination was conducted at wavelength of 610 nm.Thus the analysis method of niobium in zirconium alloys by 5-Br-PADAP spectrophotometry was established.Under the optimal analysis conditions, the mass concentration of niobium in range of 0-0.8 μg/mL was linear to the corresponding absorbance.The correlation coefficient was r=0.999 0, and the molar absorptivity was ε=5.9×104 L/(mol·cm).The content of niobium in zirconium alloy was determined according to the experimental method.The relative standard deviation (RSD, n=11) was 2.9% and 1.9%, respectively.The found results were consistent with those obtained by inductively coupled plasma atomic emission spectrometry (ICP-AES).
    • 邓秀琴; 吴丽香
    • 摘要: The content of Zinc(Ⅱ) in residual oil was directly determined by 5-Br-PADAP spectrophoto-metric method in the medium of O/W microemulsion( SDS-n-C4 H9 OH-n-C7 H16-H2 O) where mass fraction of water is 80%,while NH3 Cl-NH4 H2 O is used as buffer solution,sodium hexametaphosphate and thiou-rea as masking agent to mask interfering ions. The color complex of zinc (Ⅱ) has maximum absorption peak at 550 nm. The Beer’S law is obeyed when zinc(Ⅱ)content is in the range of 0~0. 48 μg/mL. Its molar absorptivity is 1.24 ×105 L/(mol·cm),the linear regression equation A =1.118 2 ×105C +0. 355 9(C concentration unit:mol/L),the correlation coefficient r=0. 999 9. The results show that:the method has good selectivity,high accuracy and sensitivity and strong practicability. It is a rapid,effective method of determining trace zinc( II) in residual oil,which has a certain significance and practical value.%以水的质量分数为80%的O/W型(十二烷基硫酸钠/正丁醇/正庚烷/水)微乳液为介质,以氯化铵-氨水作为缓冲溶液,5-Br-PADAP为显色剂,采用六偏磷酸钠和硫脲作为联合掩蔽剂以掩蔽干扰离子,利用分光光度法直接测定了渣油中的锌(Ⅱ)。锌(Ⅱ)的显色络合物的最大吸收峰位于550 nm处,锌(Ⅱ)含量在0~0.48μg/mL范围内服从比尔定律,其表观摩尔吸收系数ε=1.24×105 L/( mol ·cm)。所得一元线性回归方程为A=1.1182×105C+0.3559(C为浓度,单位为mol/L),相关系数r=0.9999。结果表明,该方法选择性好,准确度、灵敏度高,实用性强,是一种快速、有效测定油样中微量锌(Ⅱ)的好方法,具有一定的意义和实用价值。
    • 苏波波; 王艺蓉; 吴秀萍; 连国军; 曹建明
    • 摘要: Objective To estab1ish a proved spectrophotometric method for the ana1ysis of cooper in water. Methods The cooper in water was determined by the method suing 5 - Br - PADAP as a chromogenic agent in the presence of surfactant. Results The method was 1iner in the range of 0~0. 24 mg/L,the average rate of recovery was 99. 9%, the withinrun and between run CV was 1. 08% ~2. 62% and 4. 23% ~4. 57%,respective1y. Comparing this method( y) with the reference method (x),we obtained the regression equation:y=0. 983 4 x+0. 002 1,r=0. 999 1. Conclusion This method is simp1e,sensitive and suitab1e for app1ication.%目的:建立了改良的5-Br-PADAP光度法测定水中铜离子含量。方法为在表面活性剂存在下,用2-(5-溴-2-吡啶偶氮)-5-二乙氨基酚(5-Br-PADAP)为显色剂测定水中铜离子含量。结果该法线性范围0~0.24 mg/L,平均回收率为99.9%,批内变异系数( CV)和批间变异系数分别为1.08%~2.62%和4.23%~4.57%,与原子吸收分光光度法比较具有良好的相关性,线性回归方程和相关系数分别为y=0.9834 x+0.0021,r=0.9991。结论用改良的5-Br-PADAP光度法测定水中铜离子浓度方法简便、灵敏可靠,适合推广应用。
    • 王彦兵; 刘绣华; 李明静
    • 摘要: 研究了Zn(Ⅱ)-5-Br-PADAP-CPB体系分光光度法.在阳离子表面活性剂溴化十六烷基吡啶(CPB)存在下,在pH=5.60的NaAc-HAc缓冲介质中,锌(Ⅱ)与2-(5-溴-2-吡啶偶氮)-5-(二已氨基)苯酚(5-Br-PADAP)形成稳定的橘红色络合物,其最大吸收波长为557 nm,表观摩尔吸光系数ε=1.14×105 L·mol-1·cm-1,锌含量在0~0.56 mg/L范围内符合朗伯比尔定律.加入掩蔽剂后用该方法测定茶多酚锌配合物(TP-Zn)中的锌,结果满意.%The optimum conditions of the Zn(Ⅱ)-5-Br-PADAP-CPB system were studied by spectrophotome-try. A stable orange complex of zinc (Ⅱ) with 2-[(5-bromo-2-pyridyl)-azo]-5-diethyl-aminophenol (5-Br-PADAP) is formed in NaAc-HAc (pH=5.60) buffer solution containing cetylpyridinium bromide (CPB). The experimental results show that the maximum absorption of complex is at 557 nm and its apparent molar absorp-tion coefficient is 1.14×105 L·mol-1·cm-1. The Beer's law is obeyed in the concentration range of 0~0.56 mg/L for zinc (Ⅱ). The proposed method has been applied to the determination of zinc in the Zinc (Ⅱ) Complex of Polyphenol with satisfactory result after masking agents was added into the Zinc (Ⅱ) Complex solution.
    • 宋小杰; 刘昌龄; 徐海燕; 徐玲; 刘倩
    • 摘要: 采用2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)为显色剂,在表面活性剂聚二乙醇辛基苯基醚(OP)存在下同时测定铜和铟.在pH=4.0 HAC-NaAC缓冲介质中,显色体系的最大波长分别在560nm和570 nm;根据吸光度的加和性,对电镀CuInSe2 (CIS)薄膜废液进行了分析,结果令人满意.结果表明,铜在0.1~1.4 mg/L和铟在0~1.0 mg/L范围内有良好的线性关系.加标回收率铜为96.74%、铟为95.23%.%The concentration of Cu ( II ) and In(III) can be determined simultaneously using 5-Br-PADAP as chromogenic reagent in the presence of non-ionic surfactant OP. In HAC-NaAC buffer solution (pH = 4.0) , the largest adsorption wavelength of chromogenic test sample were 560 nm and 570 nm. According to the additivity of absorbance, the components and contents of electroplating waste liquor CuInSe2 was analyzed, the results were satisfied. Experimental results indicated that the concentration of Cu(II) showed a liner range of 0.1 -1.4 mg/L and the concentration of In(III) showed a liner range of 0-1.0 mg/L. The addition standard recovery of Cu (II) and In (III) were 96.74% and 95.23% .respectively.
    • 常艳香
    • 摘要: 在0.0046mol/L HAC-0.0046mol/L NaAC(PH=4.8)溶液中,以5.39×10-4 mol/L2[(5-溴-2-吡啶)-偶氮]-5-(二乙氨基)苯酚(5-Br-PADAP)与0.018mol/L KBrO3为体系,峰电位EP=-0.71V(VS.SCE),峰电流与Mo(Ⅵ)浓度在1.5×10-8 mol/L-2.0×10-6 mol/L范围内呈线性关系下,检出限可达5.0×10-9 mol/L,并且用多种电化学手段研究极谱波的性质及反应机理,实验表明为具吸附性质的吸附波.应用该法测定污水、自来水中Mo(Ⅵ)含量及回收实验,结果表明此法简便可行.
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