Dear all, I am loocking for the formula to calculate the detection limits of analyses using microprobe. Could anybody suggest me any reference?. Thank you very much in advanced for your help. Javier -------------------------------------------------------------------------- Francisco Javier Carrillo Rosúa Instituto Andaluz de Ciencias de la Tierra (Universidad de Granada-C.S.I.C.) Facultad de Ciencias. Avenida de Fuentenueva s/n 18002 Granada. ESPAÑA Tlfno: 958 248535; Fax: 958 243368 --------------------------------------------------------------------------