Table 2.

Characteristics of Bruker MAS rotors.

Bruker MAS rotor	Max. MAS rate b)		G-force on sample	Sample volume a) (μl)
	(kHz)	(RPM)
0.7 mm	111	6,660,000	11,180,000	0.5
1.3 mm	67	4,020,000	8,140,000	2.5 – 3
1.9 mm	42	2,520,000	5,330,000	10 – 14
2.5 mm (regular)	35	2,100,000	3,700,000	12 – 16
2.5 mm (thinwall)	35	2,100,000	4,200,000	12 – 20
3.2 mm (regular)	24	1,440,000	2,550,000	30 – 40
3.2 mm (thinwall) b)	5	300,000	130,000	42 – 50
	8.3	500,000	360,000
	12	720,000	750,000
	24	1,440,000	3,020,000
4 mm	15	900,000	1,360,000	89 – 92

^a)Sample volume estimates for all rotors (except 0.7mm) were obtained, and calculated from dimensions published by Cortecnet (Brooklyn, NY). The sample volume estimate for 0.7mm rotor was obtained from Bruker Biospin.

^b)Additional lower MAS rates are reported for the 3.2mm MAS rotors.