We present a new detailed analysis of the ionization quench function Q(E) used in calculating the counting efficiency in liquid-scintillation counting (LSC), which shows that Q(0) = 1, and permits one to derive Q(E) as a function of the electron energy and the parameter kB. The coefficients are tabulated by applying a new empirical formula of Q(E) for kB values in the range between 0.001 and 0.20 gMeV~(-1) cm~(-2). We demonstrate the convenience of applying ~(3)H and ~(54)Mn for β-ray and electron capture standardizations, respectively.
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