ICCAS OpenIR
Polymeric pH indicators immobilized PVA membranes for optical sensors of high basicity based on a kinetic process
Liu, ZH; Luo, FL; Chen, TL
2004-08-16
Source PublicationANALYTICA CHIMICA ACTA
ISSN0003-2670
Volume519Issue:2Pages:147-153
AbstractTwo kinds of polymeric pH indicators PPF (phenolphthalein-formaldehyde product) and CPF (o-cresolphthalein-formaldehyde product) immobilized cross-linked poly(vinyl alcohol) membranes (PPF-PVA and CPF-PVA) for optical intermittent determination of high basicity ([OH(-)] = 1-8 M) based on a kinetic process were developed. In our previous work, we had demonstrated that PPF-PVA and CPF-PVA could perform the determination of high pH values from pH 10.0 to 14.0. Here the discoloring kinetic behaviors of PPF-PVA and CPF-PVA were compared with those of free phenolphthalein, o-cresolphthalein and thymolphthalein. Experimental results and theoretical analysis indicated that the response behaviors of the optodes' membranes in concentrated NaOH solutions were diffusion-independent and still complied with the pseudo-first-order kinetics. In addition, two data analysis methods for determination were presented. One was directly based on the reduced absorbance: the other was based on the discoloring kinetic constant. It was found that the latter could perform a rapid (60 s) and reliable (relative standard deviation: 2.6%) determination for high basicity. These kinds of optodes can be used repeatedly when they are immersed in low-pH solutions to regain the protonated form after each determination. (C) 2004 Elsevier B.V. All fights reserved.
KeywordOptical Ph Sensor Phenolphthalein Kinetics High Basicity
DOI10.1016/j.aca.2004.06.028
Indexed BySCI
Language英语
WOS IDWOS:000223390000004
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/81814
Collection中国科学院化学研究所
Corresponding AuthorChen, TL
AffiliationChinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
Recommended Citation
GB/T 7714
Liu, ZH,Luo, FL,Chen, TL. Polymeric pH indicators immobilized PVA membranes for optical sensors of high basicity based on a kinetic process[J]. ANALYTICA CHIMICA ACTA,2004,519(2):147-153.
APA Liu, ZH,Luo, FL,&Chen, TL.(2004).Polymeric pH indicators immobilized PVA membranes for optical sensors of high basicity based on a kinetic process.ANALYTICA CHIMICA ACTA,519(2),147-153.
MLA Liu, ZH,et al."Polymeric pH indicators immobilized PVA membranes for optical sensors of high basicity based on a kinetic process".ANALYTICA CHIMICA ACTA 519.2(2004):147-153.
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