土壤全氮、全磷的测定,现在一般仍是采用分别消煮、测定的方法。全氮一直沿用的是经典的凯氏法,全磷多采用硫酸一过氯酸消煮液,钼锑抗比色的方法。这些分析方法,其分解率高,一般可达98%—99%,分析结果也比较准确可靠,但是在操作手续上较复杂,费时间,成本高,为此,多年来许多分析工作者曾致力于分析方法方面的改进研究,籍以简化手续,节省分析时间,降低成本。几年来,我们在分析工作中,以辽宁 Determination of soil total nitrogen, total phosphorus, are now generally used separately digestion and determination of the method. Total nitrogen has been used in the classic Kjeldahl method, the total phosphorus and sulfuric acid used a perchlorate digestion liquid, antimony molybdenum anti-colorimetric method. These analysis methods, the decomposition rate is high, generally up to 98% -99%, the analysis results are more accurate and reliable, but the operation is more complicated, time-consuming and costly, for which many analysts have been committed to Improvements in analytical methods have been introduced to simplify procedures, save analysis time and reduce costs. Over the past few years, we in the analysis, to Liaoning