TABLE 1.

Paramaters used for mass spectrometric analysis of cefmetazole and cefzolin

The ions used for both quantification and qualification of cefmetazole are indicated. Cefzolin was used as the internal standard.

Compound Name	Retention Time	Precursor Ion	Product Ion	Collision Energy	Dwell Time
		m/z		V	ms
Cefmetazole (quantify)	2.24	472	328	10	75
Cefmetazole (qualify)	2.24	472	356	8	75
Cefzolin (internal standard)	2.4	455	155.9	15	150