CAJ | 학술논문

利用重量法精确配制不同肼质量分数的肼-70样品集，采用偏最小二乘法建立了肼质量分数的近红外光谱模型，以快速测定肼-70的纯度。样品恒温时间为5 min，光谱最佳预处理方式：均值中心化，一阶导数，21点平滑，模型最佳主因子数为4。近红外光谱法与碘酸钾直接滴定法测定结果相比相对偏差绝对值小于0.13%，经t检验，两种方法测定结果无显著性差异。近红外光谱法快速、准确，可用于肼-70产品的质量控制。
이용중량법정학배제불동정질량분수적정-70양품집，채용편최소이승법건립료정질량분수적근홍외광보모형，이쾌속측정정-70적순도。양품항온시간위5 min，광보최가예처리방식：균치중심화，일계도수，21점평활，모형최가주인자수위4。근홍외광보법여전산갑직접적정법측정결과상비상대편차절대치소우0.13%，경t검험，량충방법측정결과무현저성차이。근홍외광보법쾌속、준학，가용우정-70산품적질량공제。
A series of hydrazine-70 sample sets of different content of hydrazine were prepared accurately by accurate weight method. The calibration model of hydrazine content was established by use of partial least squares regression for rapid determination of hydrazine-70 purity. The optimized stabilization time was 5 min, and the best spectral pretreatment methods were mean centre, first derivative and 21 point smoothing. The optimal principal factor number of spectrum model was 4. Compared with titration method, the relative deviation absolute value of determination results of near infrared spectroscopy was less than 0.13%. It was indicated that these two methods had no significant difference by t test. The near infrared spectroscopy method is rapid and accurate, and can be applied to the quality control of hydrazine-70.