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F i 90 70 50 30 10 -10 -30 Zephyramin Septonex Ajatin DDAB Triton SDS -50 0 0,002 0,004 0,006 0,008 0,01 0,012 0,014 0,016 Fig.4.: Surfactants influence on Ga-HQS complex at pH 3. Septonex, Zephyramine, Ajatin, SDS – mol.dm -3 , CTAC (Hexadecyl trimethyl ammonium chloride)– c/4 (mol.dm -3 ), DDAB (Didodecyldimethyl ammonium bromide) – c/5 (mol.dm -3 ), Triton X-100 – c/4.10 -5 (ppm), Brij – c/15 (mol.dm -3 ). Critical micellar concentrations are highlighted by the fulfilled marks. The nature of the complex strongly depends on the pH. The molar ratio of Me to QSA in the binary complex determined by the continuum variations method is 1:1 in acidic range and 1:3 in alkalic range (Fig.5). In the presence of cationic surfactant Zephyramine, the molar ratio of ternary complex was found to be always 1:3 (Fig.5). F i 100 80 60 40 20 0 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 x L 1 2 3 c 80 60 40 20 CTAC Brij a 100 b F i 0 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 Fig.5.: (a) Continuum variations of Al-HQS complex at pH 4. 1-c0= 1,1.10 -4 M, 2- c0= 5,6.10 -5 M, 3-5,6.10 -5 M, 0,0012M Zephyramine (b) Continuum variations of In-HQS complex. 1-c0= 3,5.10 -5 M, pH8, 2- c0= 1,8.10 -5 M, pH8, 3-1,8.10 -5 M, 0,0012M Zephyramine, pH8, 4- c0= 1,8.10 -5 M, pH4 Finally, the improved method with enhanced sensitivity by the presence of cationic surfactant Zephyramine was optimized with concentration of Zephyramine 0,0012M and five times excess of QSA to highest molar concentration of Me. Optimal pH is 4 for Al, 3 for Ga and 8 for In. Sborník soutěže Studentské tvůrčí činnosti Student 2006 a doktorské soutěže O cenu děkana 2005 a 2006 Sekce DSP 2006, strana 246 x L 1 4 2 3
F i 60 50 40 30 20 10 Data UCL LCL A B Calibration Plot y = 51,982x + 0,9186 R 2 = 0,9991 0 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 c Al (μg.cm -3 ) Fig.6.: Calibration plot for Al in the presence of 1,4.10 -4 M QSA and 0,012M Zephyramine, pH4 F i 80 70 60 50 40 30 20 10 Data UCL LCL A B Calibration Plot y = 78,46x + 1,1235 R 2 = 0,9992 0 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 c Ga (μg.cm -3 ) F i 200 180 160 140 120 100 80 60 40 20 Data UCL LCL A B Calibration Plot y = 185,06x + 10,75 R 2 = 0,9995 0 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 Fig.7.: Calibration plots for Ga (In) in the presence of 5,75.10 -4 M (resp.3,5.10 -4 ) QSA and 0,012M Zephyramine, pH3 (resp. 8) Tab.1.: Comparison of calibration parameters for each complex. U is photomultiplyer voltage and detection limits were calculated according to Graham 4 a c In (μg.cm -3 ) Al-HQS Ga-HQS In-HQS Concentration range (μg.cm -3 ) 0,004-1 U(V) 610 700 680 α X D (μg.cm -3 ) 7,476E-05 0,0149 6,720E-05 blank X (μg.cm -3 ) 0,0304 0,0349 0,0333 β D −3 ( g ⋅ cm ) X b μ x + 3s blank 6, a 0,00015 0,00022 0,0042 Sborník soutěže Studentské tvůrčí činnosti Student 2006 a doktorské soutěže O cenu děkana 2005 a 2006 Sekce DSP 2006, strana 247
Page 1 and 2: PRODUCTION OF SELECTED SECONDARY ME
Page 3 and 4: containing ampicillin, IPTG and x-g
Page 5 and 6: THE SIMPLE METHOD FOR THE RECOGNITI
Page 7 and 8: Figure 1 Negative-ion mode MALDI-TO
Page 9 and 10: Table 1 Evaluation of negative-ion
Page 11 and 12: Fig. 1: Scheme of the hydride gener
Page 13 and 14: [4] H. Matusiewicz, M. Kopras, J. A
Page 15 and 16: - are hypotriglyceridemic; - exhibi
Page 17 and 18: HYDROPHOBIZED SODIUM HYALURONATE IN
Page 19 and 20: spectrophotometer (AMINCO-Bowman, S
Page 21 and 22: Hyaluronate derivatives showed with
Page 23 and 24: copolymers were additionally functi
Page 25 and 26: Each micelle has a hydrophobic core
Page 27 and 28: STUDY OF THE COPPER(II) IONS NON-ST
Page 29 and 30: CuSO4, Cu(ClO4)2 and Cu2P2O7 of the
Page 31 and 32: total flux [mol.m -2 ] 0.7 0.65 0.6
Page 33 and 34: number of free radicals is very low
Page 35 and 36: Differences can be caused by severa
Page 37 and 38: MEASUREMENT OF THERMOPHYSICAL PROPE
Page 39 and 40: The typical time responses of tempe
Page 41 and 42: Figure 4 illustrates the typical de
Page 43 and 44: sodium sulphate and filtered to a 5
Page 45 and 46: Compare all tested evening primrose
Page 47 and 48: IMPROVED FLUORIMETRIC DETERMINATION
Page 49: Al F i 80 70 60 50 40 30 20 10 0 0
Page 53 and 54: PHYSICAL-CHEMICAL ASPECTS OF PAINT
Page 55 and 56: Finally, the solubility parameter o
Page 57 and 58: Study of the influence of different
Page 59 and 60: Fig.1: Chemical structures of pI ma
Page 61 and 62: Identification of pI markers - Firs

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