I have a user doing magnetite analyses who came across a paper, Dupuis & Beaudoin Miner Deposita (2011) 46:319-335, that reports detection limits for V, Cr, Mn at ~50 ppm and Ni, Cu, Zn at 180-470 ppm. V, Cr, Mn were collected on LLIF and Ni, Cu, and Zn were collected on LIF all at 15kV, 100nA, and 20 seconds on peak. The reported detection limits in the paper are lower than the CDL99 detection limits reported in PFE and we are counting over 100 seconds for each element at 15kv and 100nA.
As a JEOL user wondering
1. Is the Cmin from Cameca software more like a 60ci detection limit? They provide the formula in the paper (Ancey et al. 1978) and I do not know what the F refers to? They say it is a "computed correction factor". Is this to get the standard used back to the pure element intensity? Also not sure I understand what the lambda(alpha,beta) statistical parameter is.
2. Can some one provide a comparison of actual count rates on a LiF versus an LLiF?