CAJ | 학술논문

离子选择电极法测定土壤全氟化物前处理过程中的熔融条件控制至关重要。使用马弗炉或高温烘箱直接升温，熔融反应过于剧烈，测定结果误差大。本实验就氢氧化钠与土壤的比例、马弗炉的升温方式、熔融最终温度和时间的选择进行相关研究。通过实际样品和有证标准样品多次试验验证：本方法检出限为12.5mg／kg ；平行测定的相对标准偏差RSD＝2.0％～5.9％；有证标准样品测定结果与真值的相对误差RE％＝－1.1％～1.3％。程序升温控制熔融条件下，样品测定的准确、可靠性得到了改善。
리자선택전겁법측정토양전불화물전처리과정중적용융조건공제지관중요。사용마불로혹고온홍상직접승온，용융반응과우극렬，측정결과오차대。본실험취경양화납여토양적비례、마불로적승온방식、용융최종온도화시간적선택진행상관연구。통과실제양품화유증표준양품다차시험험증：본방법검출한위12.5mg／kg ；평행측정적상대표준편차RSD＝2.0％～5.9％；유증표준양품측정결과여진치적상대오차RE％＝－1.1％～1.3％。정서승온공제용융조건하，양품측정적준학、가고성득도료개선。
Control of melting condition is crucial w hen total fluoride in soil is determined by the meth‐od of ion selective electrode. The research contents of this paper include the ratio of sodium hydroxide with the soil sample ,the heating mode of muffle furnace ,the selection of final melting temperature and time. The testing data with good results were confirmed through actual samples and certified reference materi‐als. The detection limit was 12.5mg/kg ,the relative standard deviation was 2.0%‐5.9% relied on parallel determination ;t the certified reference sample test results were qualified and the relative error was from -1.1% to 1.3%. The experiment results confirm that the temperature programme control of melting condi‐tion is more accurate and reliable.