铋电极差分脉冲伏安法测定水中痕量2,4-二硝基苯肼.pdf

化工.环保
ENVIRONMENTAL PROTECTION OF CHEMICAL INDUSTRY
2014年第34卷第4期
铋电极差分脉冲伏安法测定水中
痕量2,4-二硝基苯肼
马飞,石登武,李建平
(柱林理工大学化学与生物工程学院,广西桂林541004
摘要]以自制鉍电极作为工作电极,建立了铋电极差分脉冲伏安法测定2,4-二硝基苯肼的分析方法。实验结果表明:以0.1
mo/L Naoh+0.1 mol/L KCI混合溶液(pH-13.0)配制测定底液,在扫描速率为100mVs的条件下,2,4-二硝基苯肼于-053V处
产生灵敏的氧化峰;在2,4-二硝基苯肼浓度为3.0x108~1.0×103molL范围内,空白和试样的氧化峰电流强度差值与对应2,4
二硝基苯肼浓度的对数呈良好的线性关系,检出限达8.37×10~"molL;将该方法应用于工业废水中痕量2,4-二硝基苯肼的检
测,回收率为95.6%~103.1%,相对标准偏差小于3%。
关鍵词]鉍电极;2,4-二硝基苯肼;差分脉冲伏安法
L中图分类号]X832「文献标志码]A[文章编号」1006-1878(2014)04-0398-04
Determination of Trace 2, 4-dinitrophenylhydrazine by
Differential Pulse Voltammetry with Bismuth Electrode
Ma Fei, Shi Dengwu, Li Jianping
College of Chemical and Biological Engineering, Guilin University of Technology, Guilin Guangxi 541004, China)
Abstract The differential pulse voltammetry method for determination of 2 4-dinitrophenylhydrazine
was established using the self-made bismuth electrode as working electrode. The experimental results show
that When the mixed solution with 0.1 mol/L NAOH and 0.1 mol/L Kcl(PH=13.0)is used as substrat
solution and the scanning rate is 100 mv/s, a sensitive oxidation peak of 2, 4-dinitrophenythydrazine is
appeared at-053 V; When the concentration of 2, 4-dinitrophenylhydrazine is 3.0x 10-1.0x 10
L, the difference of peak current intensity between the blank and the sample has a linear relationship with
the logarithmic value of 2, 4-dini rohen drazine concentration, and the detection limit is 8.37x 10/
L; When trace 2, 4-dinitrophenylhydrazine in the industrial wastewater is determined by this method, the
recovery rate is 95.6%0-103.1%0, the relative standard deviation is less than 3%
Key words: bismuth electrode; 2, 4-dinitrophenylhydrazine; differential pulse voltammetry
2,4-二硝基苯肼主要用于炸药制造,也可作为硝基苯肼的测定主要是利用显色法或色谱法2引
鉴别醛、酮的化学试剂。2,4-二硝基苤肼对环境的前者灵敏度不高,后者复杂烦琐,且需大型仪器。
危害主要表现为燃烧时释放出有毒的刺激性烟雾,
通过吸人、食人、皮肤吸收等途径进人人体,不仅
收稿日期]2013-11-22;[修订日期]2014-05-06。
刺激眼和皮肤,还可能引起高铁血红蛋白血症,使
作者简介』马飞(1987-),女,四川省西昌市人,硕土生,研
人出现紫绀叫。含有2,4-二硝基苯胼的工业废水剧
究方向为电化学传感器。电话1837732179,电邮 mickey.
ma.1001@163.com。联系人:李建平,电话0773-5898551,电邮
毒,如果未经处理排放到环境中,即使微量也会对 likianpinga 263n
环境造成重大污染。因此,建立一种简单易行的「基金项目了国家白然科学基金项目(21150021375031):;广
2,4-二硝基苯肼测定方法非常必要。目前,2,4-二西自然科学基金项日(2012 GXNSFAA063032)。