着重论述了本底计数对倒数外推方法的影响。

The paper particularly introduces the effect of background counting on the reciprocal extrapolation method.

用该方法在实验室试验结果表明，可较好地克服本底计数波动的干扰。提高测钾精度。

Experimental data showed that such a technique could reduce the adverse effect caused by the random fluctuating of base count, and therefore improve the procession of potassium determination.