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(2) z>º *~ G;j &Ë ~&b, ^*~ V~ Öê ~Wj &VbB V çj Ï "Öz>² ;ï :JbB~ ' Ö ê¢ ê > ®î . Vö Ö"¢ ~ ¶ .. þ 8\ # £ B·B * ~ *Vz' ßWj ÚÚV * B~*{*~êº EPSILON(BAS Model EPSILON cyclic voltammograph, Bioanalytical System, Inc., U.S.. j Ï~ áîb, Vöº Ag/AgCl V&* (BAS, MF2052)" Pt * Ö>î . ~ Î ^G;f Vê, KIPP & ZONEN(BD 111, Holand)& ÖB EG&G Model 362(Princeton Applied Research, U.S.A.) ¢;**V¢ ÒÏ~& . *î Ï~ pH {f R&jÏÏ pH 4, 7, 10(Shinyo Pure Chemicals Co., Japan, S.P.C. GR Reagent)j A.). V654V.
(3) V`çj ÏR :J>*~ Öz>² ~ö R Öê. Ï~ ¦;B Digital pH/mV/Temp meter(Suntex SP701, Taiwan)j Ï~ Úr . w&(:0.1 mm)f JªJ¢f '' Flukaf SigmaÒ B®î b, Vî ÒÏB "Öz>²º Junsei(35% EP)Ò B®j Ï~& . þ Ïf ¢>'b ÒÏ> º jÏbî~ ãÖ 7º* pH; ®&Ë~æ 0.1 M~ NaCl(Shinyo Pure Chemicals Co., Japan, 99.5%) 7W*îj Ï~& . Ò *î Ï~ pHº cf HCl(Orintal Chem. Co., Korea)" NaOH(Shinyo Pure Chemicals Co., Japan)j '.® &~ ;~ & .. * ~ 9; ê²># * ³öB *¶ *bî ÒÏF. Úbî, ferrocene 0.09 gj 10 mL~ CHCl ö w & 0.91 g" b ê, 60 CöB ~ CHCl j B . áÚê ferrocene w&f J ªJ¢j 55:45(wt/wt)~ jN b~ ê²>#j 3. o. 3. 655. ò . V çf 90ª ç ^β¾& 2ê ~, jºï~ çj ~ 60 CöB >ªj B ê, >#ö b«* j*® b r, JZ 7/ B>º çã 6 mm~ polyethylene Â2ö j ò * b ÒÏ . o. 5b. Ö # 8 * ~ *Vz' ß9 Fig. 1f Öê& pH 7.75 *î Ï 7öB Vç ï 10% * ~ *Vz' ßWj "º B~*{*~ê . a, b, c, d~ ³B BB *{ "Ò>îb, af bº *îö VîÏ &ææ p~j ãÖ~, Ò cf dº 10 mL * î Ïö 0.10 M H O 200 µL& &ê ãÖ~ æzB ÎÛj " ® . r~ OËb *{ " Ò(0.0 mV→ −300.0 mV)~º a~ ãÖ, r** Ã& ö V¢ ~ö*~& 6ê'b Ã&~º ©j 2. 2. Fig. 1. Cyclic voltammograms of the tobacco plant tissue modified carbon paste electrode without(a, b) and with(c, d) 200 µL of 0.10 M H2O2 in 10 mL of 0.10 M NaCl( pH: 7.75, scan rate: 10 mV/sec, tissue %: 10). The current difference between a and c is shown(inset). 2004, Vol. 48, No. 6.
(4) J^7. 656. " ®º, º * ö FB Vç ¶Ú& &æ zb~ bb 6j 6n r, * ê öB & {>æ pf *Vz >w ê Ú¦ öB ¢Ú¾ ®j &ËW ®b, * ** Ã& Ï**~~ Ã&& þ V ©b " > ® . c~ ãÖ r** "Ò , −40 mV(vs. Ag/AgCl) 6öB Vî Î&>¶ * *~~ /Ï æz ¢ " ® . æzº Vî~ Î&ö V~ , −40 mV êö áÚæº *{*~ê~ ;& a f jv~ *~Ã& ö æ;B 6 ìº ©b j Ã&B *~ af c~ Nº Jç "Öz>²~ ~öö V ©¢ ê ZO © . *~ a f c~ N¢ ~, ©j *{ö &~ ê © Fig. 1~ cö "Ú^® . *~~ N, ¯ ^*~ º *{ö &~ Z& ©j " > ®º, º * **~ æzö &~ çF'b æ~º ~ ã Ö¾, Ã&~º ~ *ç~ ãÖfº & ' . ò VB Ã&B *~& *{ Ã&ö Z&~² ¢; ©f ~ö>º z« ¢« , © "Öz>²ö Vj ÝA~ " ® . ^*~ G;j * * **º * .~ ã Ö ÔºÚ −150 mV(vs. Ag/AgCl) ;~&. . Fig. 2º þöB ^& áÚæº *;' ";j " ® . pH 9.37~ 10 mL *î Ï 7öB 19%~ Vçj ~ ®º * j Ï~º ãÖ, Vî ìº çöB **ê 9,12. 6,8b,10. Fig. 2. Typical time course of signal showing the experimental determination of the response current and the saturation time. The measurement was under the following conditions. pH= 9.37, tissue%=19, electrode potential=−150 mV(vs. Ag/AgCl). 30 µL of 0.10 M hydrogen peroxide was added into 10 mL electrolytic solution.. Fig. 3. Effect of the tissue composition on the response current at pH 7.75. 50 µL of 0.10 M H2O2 solution was added.. 'Ï , /Ï® ;WB Ï**~º & Û 15. ã" ê :ûF >&b 6²~ ^G; ö 'Ëj ~æ pº . :ûF~ æz& ìº ç , ¯ *~ ãÖ **ê ;W ê 70.& ã">î j r, 0.10 M H O VîÏ 30 µL& Î&> ^ *~& W>º, *~º &Û 13.¢ ã"~ z>, Vº 180 nAªj " ® . Þ * ö Ò > ®º W¶Ò~ >º * bî ~º ç~ ï æzf ç7' &N ® . * ~ Vç ïòj æz* ^* ~~ æz¢ &V Ö"& Fig. 3ö "Úr . * ** −150 mVöB 0.10 M H O Ï 50 µL¢ & r, ^*~º ç~ ï æzö &Ú çFW (y=16.7x−54.2, y: current(nA), x: tissue %, R=0.993)ª j " ® . ãËWö V ^¢ áV *~ * ôf çj © º> ¾, ï%& Ã&> ê²>#~ 6ê& ²~ , * ~ > ÒÏb * ~ "¶ *~~ Ò*Wö ² ¶çj "æ, G;ö ÒÏF 2êB Vç~ ïf 19% ;~& . *~. þÖ"¦8 áÚê þ , ¯ * ** −150 mV f ç ï 19% * j 0.10 M NaCl Ï 10 mL ö *~Ê, þ pH8öB 0.10 M VîÏ 30 µL¢ º&~&j r áÚæº *~ i(nA)~ 8. Table 1ö "Ú^ ® . Ò 8 j pHö &~ ê © Fig. 4ö "Ú^ ® . Fig. 4& "º ãËWf pH 8.00" pH 10.0 ÒöB &8 ;W> ®rj r > ® . Wî WB Î (potential step). 2. 2. 2. 2. Journal of the Korean Chemical Society.
(5) 8`çj ÏR :JbB~ Öz>² ~ö R Öê Table 1. Effect of pH on the response current and the saturation time. 30 µL of 0.10 M hydrogen peroxide was added pH. i(nA). t(sec). pH. i(nA). t(sec). 3.56 4.07 4.68 5.08 5.55 6.10 6.80 7.60. 33 45 60 83 105 120 140 150. 52 48 44 34 26 21 20 18. 8.26 9.07 9.78 10.45 11.19 11.78 12.30. 158 177 153 132 117 84 64. 18 15 18 20 22 26 28. 657. ©j r > ® . Vçj ÒÏ Öz>² bB ~ ' Öêö &~ ôf \& Ú^¢ ©¾, * êöBº 8j ' Öê¢ ê ZO © . Table 1öº Fig. 2öB áÚê © ÿ¢ O»b G;B *~~
(6) z* "Ú^ ®, pHö 8 ©~ æz& Fig. 4ö þ ê >Ú® . pHæzö 8
(7) z*~ æz ãËWf *~ Vf >& ãËWj " ®b, ©j Ò.~ O;f . ~ ²8 14.5 secº pH8 8.93¢ H áÚæº, 8f *öB *~~ V¦8 áÚê 8.517 ² æ p . º pH 8.93~ ·W¶ ³ê& ·W¶WÖ(diprotic acid) j Ö~ ºV ;WB β~ W¶Ò~ «Ú ' \ö &~ Vî~ ç^·Ï &Ë ÎN' >ê 'Ëj ~ ®rj ö~ " ® .. Ö V Fig. 4. pH-dependence of the current( ù ) and the saturation time ( ø ). Other conditions are the same as in Fig. 2.. ²~ W¶Òº Ï 7ö Ò~º ·W¶~ îO &Ë ö j öb \W> Ú ® . æ Ï~ pHæzº β W¶Ò~ «Ú' \, ¯ β~ / Kö ² 'Ëj > ® . VB pHæzö 8¢ & *~¢ ¾æÚ º pH8 Ò~º ©f ·W¶~ îO β Wî Vî~ «Ú' Öj 'z* / Kj &z~º pH& Òj Ò~ ® . þ'b pH8òj ^ª~ 'pH¢ { > ìbæ ºï¦8 ºÂB Özβ¢ Ï * ~ ãÖ f ? Öz>²~ ~ö>& &ÖÊ ª
(8) ¢ ;W ©¢º &; ~ö &ÖÊ > Ò.~~ O;, 9. i = (A ⁄ ( w* sqrt ( pi ⁄ 2 )) )* exp ( –2* ( pH – 8.517) ⁄ w). 2. –39.17. j áî . VB Af w~ 8f '' 1715f 6.90 , >~ &8f pH8 8.517¢ H áÚæº 2004, Vol. 48, No. 6. Öz-~ö, ¯ *¶~ ÿ >>>º β>wf *Vz' O»b >w~ ³ê¾ >w z î ¾ö ;¢ áj > ® . Vçj
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(10) z>º *~ æ z ãËWj ªC~ V Öz>² ªÎ²~ ' Öê¢ êÂ~& . v O»b áÚê ' Ö êº ² æ p~b, '' 8.517 8.93î . ¢^f 2004-2006jê Ó"&L F\ Wj(ßêB)ö ~~ \>îb, ö p 6Òãî .. Ï^ò 1. Ruan, C.; Yang, R.; Chen, X.; Deng, J. Electroanal. Chem. 1998, 455, 121. 2. Sergeyeva, T. A.; Lavric, N. V.; Rachkov, A. E.; Kazantseva, Z. I.; Piletsky, S. A.; El’skaya, A. V. Anal. Chim. Acta, 1999, 391, 289. 3. Bongiovanni, C.; Ferri, T.; Poscia, A.; Varalli, M.; Santucci, R.; Desideri, A. Bioelectrochem. 2001, 54, 17. 4. Liu, S. Q.; Ju, H. X. Anal. Biochem. 2002, 307, 110. 5. (a) Kwon, H. S.; Kim, K. K.; Lee, C. G. J. Kor. Chem. Soc. 1996, 40, 4, 278. (b) Yoon, K. J.; Pyun, S. Y.; Kwon, H. S. J. Kor. Chem. Soc. 1997, 41, 7, 343..
(11) 658 6. Yoon, K. J.; Kim, K. J.; Kwon, H. S. J. Kor. Chem. Soc. 1999, 43, 3, 271. 7. Lee, B. G.; Yoon, K. J.; Kwon, H. S. Anal. Sci. Tech. 2000, 13(3), 315. 8. (a) Yoon, K. J. Bull. Korean Chem. Soc. 2004, 25, 7, 991. (b) Yoon, K. j.; Lee, B. G.; Kwon, H. S. Anal. Sci. Tech. 2000, 13(1), 41. (c) Lee, B. G.; Kwon, H. S.; Kim, K. E.; Yoon, K. J. Anal. Sci. Tech. 2001, 14(3), 286. 9. Yoon, K. J. Anal. Sci. Tech. 2003, 16(6), 504. 10. (a) Kirchner, J. R. Encyclopedia of Chemical Technol-. J^% ogy; Wiley-Interscience; New York, U.S.A., 1981; Vol. 13, p12. (b) Irving Sax, N. Hawley’s Condensed Chemical Dictionary; Van Nostrand Reinhold: New York, U.S.A., 1987; p 618. 11. (a) Lin, M. S.; Tham, S. Y.; Rechnitz, G. A. Electroanalysis 1990, 2, 511. (b) Fang, Y.; Cai, R.; Deng, J. Electroanalysis 1992, 4, 819. (c) Oungpipat, W.; Alexander, P. W.; Southwell-Keely, P. Anal. Chim. Acta, 1995, 309, 35. 12. Yoon, K. J.; Kwon, H. S. Anal. Sci. Tech. 2004, accepted.. Journal of the Korean Chemical Society.
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