CAJ | 학술논문

催化动力学分光光度法测定饲料中碘具有分析成本低、灵敏度高等优点,但该方法的测量误差较大,测量结果不易重现等缺陷影响了它在生产中的推广应用。为快速准确地测定饲料中的碘含量,有必要对整个实验过程中主要不确定度来源进行分析,明确关键控制环节,有效减少误差,为评价试验中测量结果的真确性提供科学依据。建立测量过程中主要分量的定量数学模型,通过最小二乘法线性拟合曲线,对数学模型中的定容体积、试样称量、重复测定等分量进行不确定度量化,合成得到了测定结果的相对不确定度及扩展不确定度。在95%的置信概率下,碘含量的测量结果报告为X=(2.48±0.29)mg/kg,k=2。影响催化动力学分光光度法测定饲料中碘含量的不确定度主要来源是由标准系列配制和消化液定容体积所产生的不确定度。对这两个环节加强质量控制,即可减少误差,提高测定结果的准确度。
최화동역학분광광도법측정사료중전구유분석성본저、령민도고등우점,단해방법적측량오차교대,측량결과불역중현등결함영향료타재생산중적추엄응용。위쾌속준학지측정사료중적전함량,유필요대정개실험과정중주요불학정도래원진행분석,명학관건공제배절,유효감소오차,위평개시험중측량결과적진학성제공과학의거。건립측량과정중주요분량적정량수학모형,통과최소이승법선성의합곡선,대수학모형중적정용체적、시양칭량、중복측정등분량진행불학정도양화,합성득도료측정결과적상대불학정도급확전불학정도。재95%적치신개솔하,전함량적측량결과보고위X=(2.48±0.29)mg/kg,k=2。영향최화동역학분광광도법측정사료중전함량적불학정도주요래원시유표준계렬배제화소화액정용체적소산생적불학정도。대저량개배절가강질량공제,즉가감소오차,제고측정결과적준학도。
ABSTRACT:Determination of iodine in feeds by catalytic kinetic spectrometry has the advantages of low cost,and high sensitiv-ity,but the measurement error of this method is large,the measurement results are not easy to reproduce,which affects its ap-plication in production.In order to determine iodine content in feed quickly and accurately,it is necessary to analyze the main sources of uncertainty in the whole process of the experiment,clarify the key control links,effectively reduce the error,and provide scientific basis for the authenticity of the measurement results of the evaluation experiment.The quantitative mathemat-ical mode of respective components in experiment was established,fitting curve by the least squares method,the relative and ex-panded uncertainty of volume size,sample weighing and repeated measurements were analyzed and calculated by the model.At the 95% confidence probability,the measurement results for iodine content reported as X=(2.48±0.29)mg/kg,k=2. Standard series preparing and volume of digestive fluid were the main sources of uncertainty.Strengthening the quality control of the two links could reduce the error,and improve the measurement accuracy.