利用全自动定氮仪测定硝化棉的含氮量
发布时间：2018-07-17 08:11
【摘要】：采用自行研制的全自动定氮仪测定硝化棉的含氮量,研究了样品前处理条件、全自动定氮仪实验参数对检测结果的影响;讨论了实验的准确性与重复性,对全自动定氮仪法与传统合金还原法进行了比较。结果表明,样品前处理采用石墨炉加热,梯度升温的皂化模式;最佳实验参数为:蒸汽体积分数80%、预热30s、还原反应7min、硼酸体积35mL、蒸馏时间8min;与传统合金还原法相比,采用全自动定氮仪检测硝化棉含氮量的方法用时少、操作简单,自动化程度高,减少了人为误差的影响,可保证结果的精度和准确性。
[Abstract]:The determination of nitrogen content in nitrified cotton with a fully automatic nitrogen-fixing instrument developed by ourselves was used to study the effect of sample pretreatment conditions and experimental parameters of automatic nitrogen-fixing instrument on the results of the test, and the accuracy and repeatability of the experiment were discussed. A comparison was made between the automatic nitrogen-determination method and the traditional alloy reduction method. The results show that the saponification mode of sample pretreatment is graphite furnace heating and gradient heating, the optimum experimental parameters are as follows: steam volume fraction 80, preheating 30 s, reduction reaction 7 min, boric acid volume 35 mL, distillation time 8 min. The method of detecting nitrogen content in nitrified cotton with automatic nitrogen-fixing instrument has the advantages of less time, simple operation and high automation degree, which can reduce the influence of human error and ensure the accuracy and accuracy of the result.
【作者单位】： 西安近代化学研究所;
【基金】：国防科工局技术基础计量项目(J092012A005)
【分类号】：O652.9;TQ075.1
本文编号：2129746
[Abstract]:The determination of nitrogen content in nitrified cotton with a fully automatic nitrogen-fixing instrument developed by ourselves was used to study the effect of sample pretreatment conditions and experimental parameters of automatic nitrogen-fixing instrument on the results of the test, and the accuracy and repeatability of the experiment were discussed. A comparison was made between the automatic nitrogen-determination method and the traditional alloy reduction method. The results show that the saponification mode of sample pretreatment is graphite furnace heating and gradient heating, the optimum experimental parameters are as follows: steam volume fraction 80, preheating 30 s, reduction reaction 7 min, boric acid volume 35 mL, distillation time 8 min. The method of detecting nitrogen content in nitrified cotton with automatic nitrogen-fixing instrument has the advantages of less time, simple operation and high automation degree, which can reduce the influence of human error and ensure the accuracy and accuracy of the result.
【作者单位】： 西安近代化学研究所;
【基金】：国防科工局技术基础计量项目(J092012A005)
【分类号】：O652.9;TQ075.1
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1 汤国魁;;快速、准确、微量的半自动定氮仪[J];沈阳化工;1985年02期
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