Aktii'vitas antiinikroba penisilifla terletak padakeutuhan cinciri j3-laktam. Gugus karbonil pada cincin Klaktam mempunyai frekuensi yang spesifik pada 1780 - 1770ci -( -. Penelitian mi Kan memarfaatkan kespesifikan resapanpacla ciaerah inframerah mi dalain analisiskuarititatif derivat penisi1irtaTujuah pertelitiari ml adalah membandingkan has 11penetapan kadar secara spektrofotoineti inframerah denganpotensi ainoksisilina dan untuk merigetahui sejauhmana suhudan iamanya pemanasari berpengaruh terhadap kadar danpotensi amoksisiiiria, dergan cara memariaskannya pada suhu40°C dan 60°C selama 10 menit, 20 menit, 40 meriit, 1 jam,2 jam, 4 jam, 8 jam, 16 jam, 1 han, 2 han, 4 han, 8han, 15 han, dan I bul an. Hasil pemanasan tersebutdipeniksa kadarnya secara sp .ektrofotometni inframerahmenggunakan teknik tab1et 1 KBr -dan potensinya. Penetapanpotensi dilakukan dergan uiietoda difusi. Sebagai reservoirlarutan ataoksisilina di.gunakan silinder besi tahan karat,derigan kuman uji Sarciri.a lutea ATCC 9341 'pada medium 11.Dari pengujian statistik terhadap amoksisilina baku,ternyata ads korelasi antara hasil penetapan kadar secaraspektrofotoirietni inframerah dengari poterisi amoksisilina.Penetapan kadar amoksisilina akibat pemanasan cenderungmembenikan hasil lehih tinggi dibandingkan dengan potensi, disebabkan karena •hasil urai yang terbentukrnengganggu pada penetapan kadar secara inframerah Olehsebab itu, metoda spektrofotometri infrarnerah han ya dapatdigunakan untuk penetapan kadar amoksisilina yang belummengalami penguraian.

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The activity of penicillin antimicrobial is in the totality of

P-lactam ring. The group of carbonyl in P-lactam has a spesific

vibration of frequency, that is 1780 - 1770 cm. This study will

take the advantage of this spesific penetration on the infra red

area in quantitative analysis of penicillin's derivate.

The aim of this study is to compare the fixing of concentration

with infra red spectrophotoinetry and amoxycillin 's potency and also

we want to know how far the temprature and duration of heating

influence the concentration and amoxycillin's potency, by heating it

at 400C and 60°C in 10 minutes, 20 minutes,40 minutes, an hour, 2

hours, 4 hours, 8 hours, 16 hours, a day, 2 days, 4 days, 8 days and

a month. The concentration of the heating's results were examined

with infra red speetrophotometry using Or pellet and tested for its

potency. Diffusion method is used to settle the potency. An anti corrosion

cylindrical iron with Sarcina lutea A1YX 9341 microbe in

stage-11 is used as the reservoir of amoxycillin solution.

Statistically test to standard of amoxycillirz, we see there is

a correlation between fixing the concentration with infra red

spectrophotoinetry and ainoxycill in's potency. The fixing of

ainoxycillin's concentration caused by heating is higher if we

compare with potency, it's because of the degradation formed

influenced it. Therefore infra red speetrophotometry method is used

just for fixing the concentration of undegr&Iated amoxyciilin