the calibration graphs were linear over the ranges of about 0-6 micrograms/ml beta-lactam antibiotics penicillins ( ab-pc , penicillin g , sulbenicillin , amoxicillin , cyclacillin , oxacillin , hetacillin and piperacillin ) and cepham antibiotics ( cex , cefazolin , cephaloglycin , cephaloridine and cefpyramide ) , and the relative standard deviation was 2.7 % for 1.4 micrograms/ml of ab-pc ( n = 5 ) .
C0030827
penicillin g
C0002680
ab-pc