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Spectrophotometric Determination of Acetylsalicylic Acid with Copper-alpha-picolin Complex in Tetrachloromethane

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Journal of the Pharmaceutical Society of Korea 13. 80^83(1969)

a-Pieolin 평에 ^ 한 Aspirin 55®

a

(Received June 30, 1969)

Nam Ho Paik, Manki Park: Spectrophotometric Acetylsalicylic Acid with Copper-a-picolin

T etrachloromethane

Determination of Complex in

Acetylsalicylic acid gives a water-insoluble violet complex whh a-Picolin- C u (II) reagent.

The Complex is eztractable well with a mixture of or-Picolin-tetrachlo- romethane solution, the Complex salt dissoWed in the mixed aolution shows a maximum absorption at 620 m/t.

It has a melting point at 171°C-173®C and molar ratio of Acetylsalicylic acid: C u (II) : a-Picolin was estimated as 2:1:2 by continaous variation method and chelate titration method.

Aspirin 관한 Acid-base Volumetric titration^* Colorimetry2^

U .V Spectrophotometry I.R.시 Fluorometry®* N.M.R®* APC 융 호I S 으로도 P.P.

(7* T.L.C®> G.L.C®> Column chromatography^®* 전반에 있으나 aspirin

금속착염울 ® ? » 한융환S 으므로 * 홈등온 5^ 슴감기 용 ® 외 s a aspirin a-picolinCU) 에^하여 황롭용*^Hf t IS 람율 5 8 S하고(m.p 171~173°C) ||텔가 a-picolin CCU 흔합 품혈fe

나타내므로 ^§8^충율 •렸하고 jfcft 620m// 몇를 SJ® 하 aspirin

* * 좋은 ii콤*를 aspirin a-picolin ( I ) fe켰율 ig8Sf t

&으로 Jg0•편 aspirin Cu( I ) a-picolin J t 2 1 2 알았으므로보고함.

SI >gS

Cu.CCHjCOCOa • H jO G .R. E.M ERCK. IQ-^M a-Picolin: 3$ W AKO 33% in CCl4(v/v% ) CCI4n W i KANTO

College of Pharmacy, Seoul National University

- 8 0 - . «

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September 1969 m m # 81

Acetyl Salicylic acid: U.S.P.

Na2S04 Anhydrous Anal. R. Mallinckrodt.

Spectrophotometer: Beckman D.U.

pH meter: Model G Beckman

n s i %

1. 정량* fF

50m/ Separating funnel 33% or-picolin CCU 30m/ Aspirin Sample lOmg 녹인 10-2M Cu(Ac)2 lOmZ 하고진탕후하였. 하층 CCU 층울

M 33% a-picoiin-CCU 용액울추가 C50cc) 으로한후 NagSO* Anhydrous 2g 6n aft7jc충장 Icm Cell 33% a-picolin 으로 620m^ 하였.

2.

a-picolin e c u 33%CV/V)만든후 Aspirin lC r2M 도로도로 Cu (Ac)a 1(T2M f M 흔합후 CCU 청남색 33% a-picolin CCU

액을대조로촉정하였다(Fig. I ) .

Fig. 1. Absorption spectra of Copper( H ) a-picolin-Aspirin complex

3. pH 영향

ffi pH 7.5~ 8.5 가농하며 고만다. 따라서 «-

picolin 33% CCU 용액에서 가장좋은걸과를얻었다.

4.

실온으로부터 60°C정도까지는 아무 없으나 70°C JiL느으로

8(TC 정도에서 물질로변화되어 버림.

5. « S J t t t

(3)

82 Q , : a-Picolin 형에 ^ A sp irin f^ 1 :

33% a-picolinCCl, HI 후활헬는 끝난후부터램풍면화를 않는다(Fig. 2).

6. IS H

Aspirin 33% a-picolin CCI4 용액 10"M 로 J i Cu(Ac)2 10*M 로 33% a-picolin CCI4 녹언후농도를결과그림과 2 1 알았다(Fig. 3).

0.3

sUndtns I (ram.)120

i

F ig. 2. Effect of standing time F ig. 3. CCu*3/C(CuO + (A S A )J

또한 i g i i te S으로얻은 ether 세척후 건조 감압 d e sicc ato r건조후 fiA c

산 성 으로 <r-picolin (0 .1N H C IO 0 Cu+"*■ EDTA

(indicator PAN Purple-green) Aspirin Cu a-picoIin=2 2 알았다.

Cu a*picalin

Aspirin

found 11 32 56

Calc 10.44%

30.63%

58-62%

devt 0.56 1.37 -1.62

Remark

«

7. m m m

a-picolin CCl* 33%Cv/v) 녹인 100 cC Aspirin desiccator cp건초풍울 lOOmg 0.5, 1, 1.5 2m/등으로

렸하고 33% a-picolin CC1* 액을 채워서 lOmi

한후 1 0 - ^ Cu(Ac)2 5m/ 썩 ;&n 15m/ 하고추출후 NajSOi Anhydrous

Ig Jn IftTK 620m/i (Fig. 4)

m

Aspirin 가수 Fe

범으로하는것보다는간단하개었는 F ig . 4. Calibration CurvQ

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September 1969 m m tt 83

면에 a-picolin 악취 인하여 있다고 믿어진다.

조작이 즐겁지 못하나 단일 물질인 경우는 간단히

References

1. Yaskina. IXS, and Hien N .B. Apteckn Del<r, 13 (1) 69(1964); C A 61, 9361a (1964).

2. Pankratz. R .E . and F.J. Bandelin. J , An, Pharm, Assoc. Sci. Ed. 41, 167 (1952). (T h e Aspirin is hydrolyzed to Salicylic acid and reacted with Ferric titrate to give a violet color 525m/i).

3. Tinker. R.B. and A J , McBay. J . An, Pharm, Assoc. Sci. Ed. 43, 315 (1954).

4. Parke T .V .A .M . Ribley E .E Kennedy and W .W Hiltz. Anal. Chem. 23, 953 (1951).

5. Shibazaki T . Japan, Analyst, 12, (4) 385 (1963).

6. Donald P. Hollis AnaL Chem. 35, 1682 (1963).

7. Higuchi. T .K .P . patel. E.R. Bouow.혁and J, Landsman J , An. Pharm. Assoc, sci Ed. 41 293 (1952), 8. Bailey R .W . Anal Chm . 36(10) m i (1964).

9. NikeUy. J,G. Anal Chem 36. 2248 (1964).

10. J. Levine; J . An. Pharm, Assoc. 46. 687 (1957). R .F , Heuerman and J. Levine; ibid. 47, 276 (1958).

11. Skelley N .E. and Crummett. W .B. And Chem., 35,1680 C1963),

수치

Fig.  1.  Absorption  spectra  of  Copper( H )   a-picolin-Aspirin  complex

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