Critical limit,	LC (counts) = 1.645 × [B (1 + n/2m)]1/2
	LC (cps) = (LC/t); LC (Ci) = [C × LC (cps)]
Upper limit,	LU (counts) = A + 1.645 × [A + B (1 + n/2m)]1/2
	LU (cps) = (LU/t); LU (Ci) = [C × LU (cps)]
Detection limit,	LD (counts) = 2.71 + 3.29 × [B (1 + n/2m)]1/2
	LD (cps) = (LD/t); LD (Ci) = [C × LD (cps)]