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| 差示扫描量热分析法测定硬脂酸的凝固点 |
| Determination of Solidification Point of Stearic Acid by Differential Scanning Calorimetry |
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| DOI： |
| 中文关键词: 硬脂酸；凝固点；差示扫描量热分析 |
| 英文关键词: stearic acid；solidification point；differential scanning calorimetry |
| 基金项目: |
| 中图分类号:TQ330. 38＋5；O657. 99 |
| Author Name | Affiliation | | DING Zhaojuan | Stone Testing Technology Co. ，Ltd | | LYU Yanyan | Stone Testing Technology Co. ，Ltd | | ZHANG Yanling | Stone Testing Technology Co. ，Ltd | | WU Aiqin | Stone Testing Technology Co. ，Ltd | | LIU Aiqin | Stone Testing Technology Co. ，Ltd |
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| 中文摘要: |
| 研究差示扫描量热分析（DSC）法测定硬脂酸凝固点的影响因素，对比DSC法与手工法（按GB/T 9104—2008《工业硬脂酸试验方法》进行）测定硬脂酸凝固点的异同。结果表明：DSC法测定硬脂酸凝固点的优化试验条件为样品用量 10 mg，氮气流速 20 mL·min-1，熔化温度 70 ℃，冷却速率 5 ℃·min-1；与手工法测定硬脂酸凝固点相比，DSC法操作简便、快速，试样用量小，测试精密度高和重复性好。 |
| 英文摘要: |
| In this study，testing of the solidification point of stearic acid by differential scanning calorimetry （DSC） was investigated and testing parameters were optimized. Similarities and differences between DSC method and manual method which was according to GB/T 9104—2008，Stearic Acid Test Method were compared. The results showed that the optimal testing parameters of the DSC method were as follows：sample weight 10 mg，carrier gas flow rate 20 mL·min-1，melting temperature 70 ℃，and cooling rate 5 ℃·min-1. Compared with manual method，DSC method was simple and fast，required only a small amount of sample，and the test presented high precision and good measurement repeatability. |
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