“…Up to now, several mass spectrometric techniques have been applied for 90 Sr analyses including accelerator mass spectrometry (AMS) (Paul et al, 1997;Arslan et al, 1994), resonance ionisation mass spectrometry (RIMS) (Bushaw and Cannon, 1997;Bushaw and Nö rtershä user, 2000;Monz et al, 1993;Zimmer et al, 1994), inductively coupled plasma mass spectrometry (ICP-MS) and electrothermal vaporization-ICP-MS (ETV-ICP-MS) (Berryman and Probst, 1996;Grinberg et al, 2007). AMS and particularly RIMS allow high isotopic and elemental selectivity and thus are suitable for determination of 90 Sr with detection limits down to 2 mBq per sample .…”