SOLVATOCHROMIC STUDIES OF SOLVATED CHROMATOGRAPHIC STATIONARY PHASES

被引:59
作者
HELBURN, RS [1 ]
RUTAN, SC [1 ]
POMPANO, J [1 ]
MITCHEM, D [1 ]
PATTERSON, WT [1 ]
机构
[1] VIRGINIA COMMONWEALTH UNIV,DEPT CHEM,RICHMOND,VA 23284
关键词
D O I
10.1021/ac00077a006
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A series of solvatochromic dyes has been used to probe the solid/solution interface of C-18 bonded silica in mobile-phase mixtures consisting of methanol and water and acetonitrile and water. Chromatographic capacity factors (k') were measured in order to determine the fraction of dye sorbed at the surface. An adaptive Kalman filter has been used to resolve the spectrum of the surface-phase dye from that due td dye in the adjacent solution. Values for the Kamlet-Taft dipolarity/ polarizability pi* parameter for octadecylsilica in contact with the methanol/water mobile phase ranged from 0.72 to 0.75, indicating that the stationary phase is considerably more polar than bulk alkane solutions. The interfacial values for pi* and a (the Kamlet-Taft hydrogen bond acidity parameter) support the hypothesis that the chemistry and solvation of the interphase region is strongly influenced by the presence of residual surface silanol groups.
引用
收藏
页码:610 / 618
页数:9
相关论文
共 41 条
[11]   LIPOID PH INDICATORS AS PROBES OF ELECTRICAL POTENTIAL AND POLARITY IN MICELLES [J].
FERNANDEZ, MS ;
FROMHERZ, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1977, 81 (18) :1755-1761
[12]  
FRODYMA MM, 1968, MODERN ASPECTS REFLE, pCH6
[13]   LATERAL AND TRANSVERSAL DIFFUSION AND PHASE-TRANSITIONS IN ERYTHROCYTE-MEMBRANES - EXCIMER FLUORESCENCE STUDY [J].
GALLA, HJ ;
LUISETTI, J .
BIOCHIMICA ET BIOPHYSICA ACTA, 1980, 596 (01) :108-117
[14]   BACKGROUND SUBTRACTION FOR FLUORESCENCE DETECTION IN THIN-LAYER CHROMATOGRAPHY WITH DERIVATIVE SPECTROMETRY AND THE ADAPTIVE KALMAN FILTER [J].
GEROW, DD ;
RUTAN, SC .
ANALYTICA CHIMICA ACTA, 1986, 184 :53-64
[15]   INFORMATION-BASED PREDICTION OF THE PRECISION AND EVALUATION OF THE ACCURACY OF THE RESULTS FROM AN ADAPTIVE FILTER [J].
HAYASHI, Y ;
RUTAN, SC ;
HELBURN, RS ;
POMPANO, JM .
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS, 1993, 20 (02) :163-171
[16]   ACCURACY, PRECISION AND INFORMATION OF THE ADAPTIVE KALMAN FILTER IN CHROMATOGRAPHY [J].
HAYASHI, Y ;
RUTAN, SC .
ANALYTICA CHIMICA ACTA, 1993, 271 (01) :91-100
[17]  
HAYASHI Y, IN PRESS 4TH P S COM
[18]   SOLVATOCHROMIC STUDIES OF STATIONARY PHASES ON THIN-LAYER CHROMATOGRAPHIC PLATES [J].
JONES, JL ;
RUTAN, SC .
ANALYTICAL CHEMISTRY, 1991, 63 (13) :1318-1322
[19]   LINEAR SOLVATION ENERGY RELATIONSHIPS .23. A COMPREHENSIVE COLLECTION OF THE SOLVATOCHROMIC PARAMETERS, PI-STAR, ALPHA AND BETA, AND SOME METHODS FOR SIMPLIFYING THE GENERALIZED SOLVATOCHROMIC EQUATION [J].
KAMLET, MJ ;
ABBOUD, JLM ;
ABRAHAM, MH ;
TAFT, RW .
JOURNAL OF ORGANIC CHEMISTRY, 1983, 48 (17) :2877-2887
[20]   SOLVATOCHROMIC COMPARISON METHOD .1. BETA-SCALE OF SOLVENT HYDROGEN-BOND ACCEPTOR (HBA) BASICITIES [J].
KAMLET, MJ ;
TAFT, RW .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1976, 98 (02) :377-383