Full
Outline
To achieve metrological calibration of nL/min-level liquid ultra-microflow, a piston-type liquid ultra-microflow standard device based on the interference method has been developed. This device employs laser interference measurement technology to ensure precise capture of the syringe piston’s micrometer-level displacement. By establishing a flow calculation model based on the syringe's inner diameter and piston displacement, the uncertainty of each component in the device is analyzed and evaluated. The study used syringes of various specifications to test ultra-microflows in the range of 1–1000 nL/min. Experimental results demonstrate that the device can detect microscopic changes in ultra-microflow, exhibiting excellent flow response capability. Calibration errors for the syringe pump were below 1%, with an expanded uncertainty of less than 4% (k = 2). Finally, comparative experiments between gravimetric and interference method standard devices demonstrated consistent error trends in syringe pump calibration. Further calculation of normalized deviation validated the accuracy of the interference method device and the validity of its uncertainty assessment results.
98
48
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
