Table 4.

Inter-day variability of MALDI-TOF MS after sample preparation with IMAC-Cu beads.

m/z	MS signal area			CV%
	Day1 (101908)	Day2 (102008)	Day3 (102108)
1607.4	1,629	1,767	1,089	24
2022.4	35,263	21,049	42,092	33
2251.5	12,093	13,520	15,774	13
2660.8	44,250	35,381	49,267	16
3241.3	29,019	22,306	34,462	21
3894.8	7,636	7,125	8,302	8
4963.2	51,412	62,928	87,357	27
7651.2	1,304	829	766	30
Average CV%				22

CV, coefficient of variation.