CAJ | 학술논문

针对城市污水中总氮的检测，采用高温消解和液相色谱分析联合的方法，研究了该方法的不确定度来源和结果的扩展不确定度。结果表明，样品前处理、标准曲线、重复检测和仪器对总氮结果产生的相对不确定度分量分别为0．31％、0．08％、0．12％和0．64％，合成相对不确定为0．73％，总氮结果的扩展不确定度为0．37 mg·L -1，总氮可以表示为（25．23±0．37） mg·L -1。4个不确定度分量中仪器对结果的影响最大，样品前处理的影响其次，在不确定度中分别占78％和18％。液相色谱法检测城市污水的总氮结果可靠。
침대성시오수중총담적검측，채용고온소해화액상색보분석연합적방법，연구료해방법적불학정도래원화결과적확전불학정도。결과표명，양품전처리、표준곡선、중복검측화의기대총담결과산생적상대불학정도분량분별위0．31％、0．08％、0．12％화0．64％，합성상대불학정위0．73％，총담결과적확전불학정도위0．37 mg·L -1，총담가이표시위（25．23±0．37） mg·L -1。4개불학정도분량중의기대결과적영향최대，양품전처리적영향기차，재불학정도중분별점78％화18％。액상색보법검측성시오수적총담결과가고。
T his paper studies the uncertainty source and the expanded uncertainty of the result in detecting TN in urban waste water with the combined method of high-temperature digestion and liquid chromato-gram analysis .The result shows that the relative uncertainty contribution of sample pretreatment ,standard curve ,duplicate detection and equipment is respectively 0 .31% 、0 .08% 、0 .12% and 0 .64% ,w hich sum up the total relative uncertainty is 0 .73% ,the expanded uncertainty of TN result is 0 .37 mg·L -1 ,thus TN can be expressed as (25 .23 ± 0 .37) mg·L -1 .Among the four factors the equipment has the maximum in-fluence on the result ,the influence of sample pretreatment takes the second place ,w hich takes 78% and 18% respectively .The result of detecting TN in urban wastewater by chromatograph is reliable .