IrOx/Ti电极测定低温溶液的pH
Determination of pH of Solutions at Low Temperatures with the IrOx/Ti Electrode
摘 要
制备了IrOx/Ti电极,考察了温度变化对电极响应灵敏度、响应时间和电极电位的影响。结果表明:-20 ℃时该电极对乙醇防冻液的响应只比30 ℃时低2.52 mV·pH-1。据此提出了IrOx/Ti电极测定低温防冻液体系的pH的方法。电极用于-10 ℃氯化钠溶液的测定,相对极差为1.8%,相对平均偏差为0.6%。
pH测量
低温溶液
IrOx/Ti electrode
pH determination
Solutions at low temperatures
Abstract
IrOx/Ti electrode was prepared, and influences of change of temperatures to its sensitivity of response, time of response and its potential response were studied. It was found that the value of reponse of the electrode in an ethanol freezing-proof liquor at -20 ℃ was only 2.52 mV·pH-1 lower than the value obtained at 30 ℃. Based on this fact, this electrode was applied to the determination of pH values of freezing-proof liquor systems at low temperatures; and in the determination of pH values of NaCl solutions at -10 ℃, values of relative extreme difference and relative average deviation obtained were 1.8% and 0.6% respectively.
中图分类号 O657.1
所属栏目 工作简报
基金项目 福建省教育厅科技资助项目(JB11328)
收稿日期 2013/1/24
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联系人作者陈家越(fjfzcjy@126.com)
备注陈家越(1968-),男,福建古田人,副教授,硕士,主要从事电化学分析检测、水污染治理研究。
引用该论文: CHEN Jia-yue,CHEN Jian,FANG Yi. Determination of pH of Solutions at Low Temperatures with the IrOx/Ti Electrode[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2013, 49(6): 666～668
陈家越,陈健,方熠. IrOx/Ti电极测定低温溶液的pH[J]. 理化检验－化学分册, 2013, 49(6): 666～668
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参考文献
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【2】朱秋劲,罗爱平,林国虎,等.超声波和气调贮藏对冷却牛肉保鲜效果的影响［J］.食品科学, 2006,27(1):240-245.
【3】常大伟,谢晶,徐世琼,等.肉在低温下藏的对比实验研究［J］.农产品加工, 2005,1(1):7-12.
【4】陈爱民,樊绍文,周潮,等.巴氏法结合低pH孵放法在IVIG制备中的应用［J］.中国输血杂志, 2000(13):13-16.
【5】杨代勤,陈芳,阮国良,等.pH对黄鳝消化酶活性的影响研究［J］.长江大学学报:自然科学版, 2005,2(11):55-58.
【6】ACHTNTYA N, BEZBARUAH, ZHANG T C. Fabrication of anodically electrodeposited iridium oxide film pH microelectrodes for microenvironmental studies［J］. Anal Chem, 2002,74:5726-5733.
【7】陈新谦,金有豫.新编药物学［M］.北京:人民卫生出版社, 2000:290-294.
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