full2010.pdf - page 1373

1335
P36
„µ¦«¹„¬µ‡nµ‡Šš¸É „µ¦Á„·—µ¦ž¦³„°Á·ŠŽo°œ °Š Á‡°¦r‡¼¤·œ-ǦÁ¤¸¥¤(III)
Ĝ˜´ªšÎµ¨³¨µ¥ 50% Á¤šµœ°¨Ã—¥ª·›¸ Áž„ڦâØÁ¤˜¦¸
A Study of Formation Constant of Curcumin - Chromium (III) Complex in 50% Methanol
by Spectrophotometric Method
„œ·¬“µ ō¥›œ—»¨1 ´¤¡´ œ›r ªŠ«rœµªµ2 ¡· ¡´•œr ¼Ã˜ 3 ¨³¤µ¨·œ¸ ªŠ«rœµªµ4
Kanitta Chaithanadul1 , Sumpun Wongnawa2, Pipat Chooto3 and Malinee Wongnawa4
š‡´—¥n °
«¹„¬µ„µ¦Á„·—µ¦ž¦³„°Á·ŠŽo°œ¦³®ªn µŠ Á‡°¦r‡¼¤·œÂ¨³Ã‡¦Á¤¸¥¤(III) Å°°°œ Ĝ˜´ ªšÎµ¨³¨µ¥ 50 % Á¤
šµœ°¨Ã—¥Äoª·›¸ šµŠÁž„ڦâÚÁ¤˜¦¸ „µ¦«¹„¬µÂ°Ž°¦r¡´œÁž„˜¦´¤ °Šµ¦ž¦³„°Á·ŠŽo°œÁž}œÅžÅ—o
¥µ„ÁœºÉ °Š‹µ„°Ž°¦r¡´œÁž„˜¦´¤ °ŠÁ‡°¦r‡¼¤·œÂ¨³Â°Ž°¦r¡´œÁž„˜¦´¤ °ŠÃ‡¦Á¤¸¥¤(III)Å°°°œnªœš¸É
Ťnŗo šÎµž’·„·¦·¥µÁ„·—„µ¦Žo°œš´„´Â°Ž°¦r¡´œÁž„˜¦´¤ °Šµ¦ž¦³„°Á·ŠŽo°œÁ‡°¦r‡¼¤·œ -ǦÁ¤¸ ¥¤(III)š¸É
Á„·— ¹Êœ ‹¹ŠšÎµ„µ¦®´„¨°°„ץčo ަ„¦¤ Microsoft Excel ¨³®µ‡nµ‡Šš¸É„µ¦Á„· —µ¦ž¦³„°Á·ŠŽo°œ °Š
Á‡°¦r ‡¼¤·œ-ǦÁ¤¸¥¤ (III) ×¥ª·›¸ ¦oµŠ„¦µ¢‹µ„¤„µ¦ Benesi – Hildebrand
‡ÎµÎµ‡´ : Á‡°¦r‡¼¤·œ, ǦÁ¤¸¥¤ (III) Å°°°œ
Abstract
A study of complex compounds between curcumin and chromium (III) ions using spectrophotometric
method was carried out in 50% methanol. To study the absorption spectra of complex compounds in this system
is difficult because the absorption spectra of unreacted curcumin and chromium(III) ion overlap with that of
curcumin - chromium (III) complex. To solve this problem the Microsoft Excel was used to manipulate the
overlappeak subtraction. Subsequently, the complex formation constant was obtained by the Benesi-Hildebrand
plot.
Keywords: Curcumin, Chromium(III) ion
1 œ· ·˜ž¦·µÃš £µ‡ª·µÁ‡¤¸ ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥Š ¨µœ‡¦·œš¦r 90112
Master's Degree Student, Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112
Corresponding author : Ú¦«´¡šr/Ú¦µ¦ 089-5947374 E-mail: nut_pank@hotmail.com
2 ¦«.—¦. £µ‡ª·µÁ‡¤¸ ‡–³ª·š¥µ«µ˜¦r ¤®µª·š¥µ¨´¥Š ¨µœ‡¦·œš¦r 90112
3 Ÿ«.—¦. £µ‡ª·µÁ‡¤¸ ‡–³ª·š¥µ«µ˜¦r ¤®µª· š¥µ¨´¥Š ¨µœ‡¦· œš¦r 90112
4 ¦«. £µ‡ª·µÁ£´ª·š¥µ ‡–³ª·š¥µ«µ˜¦r ¤®µª· š¥µ¨´¥Š ¨µœ‡¦· œš¦r 90112