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偶氮胂

偶氮胂的相关文献在1987年到2017年内共计84篇,主要集中在化学、金属学与金属工艺、临床医学 等领域,其中期刊论文76篇、会议论文4篇、专利文献3608篇;相关期刊46种,包括岩矿测试、冶金分析、铀矿冶等; 相关会议3种,包括第十一届全国分子光谱学学术会议、第二届全国理化检验学术年会、第二届痕量分析学术会议等;偶氮胂的相关文献由144位作者贡献,包括潘教麦、孙嘉彦、刘锡林等。

偶氮胂—发文量

期刊论文>

论文:76 占比:2.06%

会议论文>

论文:4 占比:0.11%

专利文献>

论文:3608 占比:97.83%

总计:3688篇

偶氮胂—发文趋势图

偶氮胂

-研究学者

  • 潘教麦
  • 孙嘉彦
  • 刘锡林
  • 刘宏
  • 吴嘉钰
  • 寇宗燕
  • 张华山
  • 张海
  • 张淑云
  • 徐博刚
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 郑红; 胡力玫; 刘江涛; 张迎雪
    • 摘要: Nano-Ti2 was used for preconcentration of trace heavy metal ions Cr3+ , Cu2+ , Ni2+ and Pb2+ in envir-omental samples and ICP-AES was used for simultaneous determination. The effects of pH, absorbent volume, elution condition, flow rate static adsorption capacity and the interference ions on the concentrating of analytes were investigated. The results showed that at pH 4. 0, Cr3+ , Cu2+ , Ni2+ and Pb2+ could be retained on the modified nano-Ti2> and then eluted with 2. OmL 2. 5mol/L HC1 completely. Under optimized experimental conditions, the adsorption capacities of modified nano-Ti2 were found to be 18.1, 17. 6, 23. 2 and 26. 8mg/g for Cr3+, Cu2+ , Ni2+ and Pb2+ , respectively. The detection limits (3a) were 0. 25, 0. 43, 0. 62 and 0. 39mg/mL, and RSDs were 2. 3%, 3.1%, 2. 5% and 3. 8% (n=ll) for Cr3+ , Cu2+ , Niz+ and Pb2+ , respectirely.%提出了改性纳米TiO2分离富集电感耦合等离子体原子发射光谱( ICP- AES)法测定环境样品中痕量Cr3+、Cu2+、Ni2+和pb2+的新方法.系统地研究了溶液pH值、吸附剂用量、洗脱条件、流速、静态吸附容量和干扰离子等因素对分析物分离富集的影响.结果表明,在pH 4.0,Cr3+、Cu2+、Ni2+和pb2+可被改性纳米TiO2定量富集,吸附的金属离子可用2.0mL2.5mol· L-1 HCl溶液完全洗脱.在优化的实验条件下,吸附剂对Cr3+、Cu2+、Ni2+和Pb2+的吸附容量分别为18.1,17.6,23.2和26.8 mg· g-1.本法对Cr3+、Cu2+、Ni2+和pb2+的检出限(3σ)分别为:0.25,0.43,0.62,0.39 ng· mL-1,相对标准偏差(RSD)分别为2.3%,3.1%,2.5%,3.8%(n=11).方法用于环境样品中痕量Cr3++、Cu2+、Ni2+和Pb2+的测定,结果令人满意.
    • 李凌凯; 刘海清
    • 摘要: 活性炭纤维是一种新型高效吸附材料,具有比表面积大,微孔发达,孔径分布窄,吸附速度快,吸附能力强等特点.通过活性炭纤维对钯溶液的吸附实验,探讨了静态条件以及动态条件下,溶液的初始浓度,系统的温度,活性炭纤维的质量,吸附时间,不同流速等条件对活性炭纤维吸附性能的影响.研究表明:活性炭纤维对钯有较强的吸附性能,最高吸附率可达98%以上,溶液的最佳初始浓度为2 μg/mL,体系的最佳温度为298 K,活性炭纤维的质量为0.08 g,最佳吸附时间为70 min,最佳流速为2.5 mL/min.%Activated carbon fiber (ACF) is a new high effective adsorbent. It has characteristicsof large specific surface area and good capability of adsorption. In this paper, it was used to absorb palladium (Ⅱ). In static state and in dynamic state, effect of original concentration of palladium( Ⅱ ), temperature of the system, mass of activated carbon fiber, time of adsorption, flow rate, etc. on adsorbent performance of the activated carbon fiber was discussed. The results show that the activated carbon fiber has good capability of adsorption for palladium ( Ⅱ ), its rate of adsorption can reach 98% under optimal operation conditions. The best original concentration of palladium (Ⅱ) is 2 μg/mL, the best temperature of the system is 298 K, the best mass of activated carbon fiber is 0.08 g, the best time of adsorption is 70 min and the best flow rate is 2.5 mL/min.
    • 路纯明; 马亚利; 李云朋
    • 摘要: 利用偶氮胂(Ⅲ)与铬的显色反应,测定啤酒中痕量铬.采用正交设计实验找出了最佳测定条件.最大吸收波长620 nm,铬(Ⅲ)含量在0~40 μg/50 mL范围内遵从比尔定律,检出限为0.5μg/50 mL.摩尔吸光系数ε=7.61×104 L·mol-1·cm-1,回收率在82%~102%.该法操作简单、稳定性和灵敏度好,测定啤酒中的铬和国标方法基本一致,结果满意.
    • 姚海林; 刘绍珍; 黄金平; 胡绍红
    • 摘要: 目的探讨新的稳定偶氮肿Ⅰ试剂,用于测定血清镁的含量.方法采用贝克曼CX5全自动生化分析仪,终点法测定,并与UVP 2450分光光度计,原子吸收法测定结果相比较.结果①测定波长,570nm为主波长,700nm为次波长;②稳定性,显色后30分钟内稳定;③线性范围,在0.25~2.41mmol/L之间线性良好,回归方程Y=1.006X+0.03,r2=0.9971:④回收率,98~101%之间;⑤精密度,批内3.1%,批间1.1%;⑥方法学比较,与原子吸收法测定结果相比较,Y=1.05X-0.06,r2=0.9900,相关良好.⑦在钙离子浓度为0.80~6.40mmol/L范围内,不受干扰;⑧稳定性,开盖后至少稳定3天.结论应用新的稳定偶氮肿Ⅰ试剂进行血清镁的全自动分析测定,其抗干扰性、络合镁特异性、反应的灵敏度、精密度均良好.且试剂安全、稳定,适合于临床应用.
    • 翟庆洲; 张晓霞
    • 摘要: In the medium of 0.18~1.08 mol·L-1 sulfuric acid, cerium(Ⅳ) has the color-fading effect on DBC-arsenazo. The apparent molar absorptivity of the color-fading reaction is ε 530 nm=1.03×104 L·mol-1·cm-1. Beer′s law is obeyed over the range of 1.20~12.0 μg·ml-1 of Ce (Ⅳ) which shows a linear relationship with the decrease in the absorbance of the colored solution. The effect of thirty-six coexisting ions was studied. The method was applied to the determination of the trace amount of cerium in water samples and has the advantage of high accuracy and good selectivity.
    • XIAChangbin HUANGNiandong
    • 摘要: Trace Ⅴ(Ⅴ) catalyzes mightily the decolorization reaction of arsenazo Ⅲ(AsA Ⅲ) by oxidizing with H2O2 in a pH 4.0 HAc-NaAc buffer solution, and the addition of Triton X-100 can further increase the sensitivity of the reaction and its catalytic extent islinear with the content of Ⅴ(Ⅴ). A catalytic spectrophotometric procedure for determining trace Ⅴ(Ⅴ)was developed. The results show that the maximun absorption of the color solution is at 560 nm and the detection limit of the method for Ⅴ(Ⅴ) is 0.014 mg.L^-1. Beer's law is obeyed for Ⅴ(Ⅴ) in the range of 0.00-0.20 mg.L^-1.The recoveries are 99.0%-104.6%, and the relative standard deviations (RSD) are 2.7%-3.7%. Combined with ion-exchange resin, the method has been applied to the determination of trace vanadium in fly ash and coal gangue with satisfactory results.
    • 严金龙; 孙汝东
    • 摘要: IO-3对偶氮胂Ⅲ具有氧化褪色作用,借此可以进行吸光光度测定碘。试验表明,在稀硫酸介质中,有色溶液的最大吸收波长为550mm,表观摩尔吸光系数为1.3×104L·mol-1·cm-1。碘浓度在0~30μg/25ml范围内遵守比耳定律。方法用于测定加碘食盐中碘,回收率可达98%~102%,结果满意。%The reagent arsenazo Ⅲ is oxidized by IO-3 in a H2SO4 medialeading to the decolorization of the reagent.The decrease of t he color intensity is proportional to the amount of IO-3 present.The absorpt ive maximium lies at 550nm with an apparent molar absorptivity of 1.3×104 L·mol-1·cm-1.Beer's law is obeyed in the concentration range from 0 to 30μg/25ml.Based on this phenomenon,a new photometric method for the determ ination of microamounts of iodine is proposed.It has been used for the determina tion of iodine in iodates,and the recovery is between 98%~102%.
    • 夏畅斌
    • 摘要: @@ 1 引言rn废水中铬(Ⅵ)的外排直接威胁着人们的身体健康,对其监测是非常必要的.目前褪色法测定铬(Ⅵ)有:偶氮氯膦类显色剂(ε=2~3×104 L.mol-1.cm-1);二溴羧基偶氮胂(ε=2×105 L.mol-1.cm-1);本文观察到在硝酸介质中偶氮胂Ⅲ与Cr2O2-7具有高灵敏褪色反应,ε=1.9×106L.mol-1.cm-1.此法操作简便,灵敏度高,条件易于控制.此法用于测定江水中痕量铬(Ⅵ),获得了满意的结果.
    • 杨勇; 罗川南; 张瑾; 钟建新
    • 摘要: 本文研究了DBC—偶氮胂与铁的显色反应 ,建立了分光光度法测定微量铁的新方法。在稀盐酸介质中 ,DBC—偶氮胂与铁形成的配合物的最大吸收波长为 6 2 0nm ,表观摩尔吸光系数ε62 0 =5 .74×1 0 4L mol-1 cm-1,铁量在 0~ 2 0 μg/2 5ml范围内符合比尔定律。该方法用于陶瓷原料中铁的测定 ,结果满意。
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