Home

Citation: Yanbin Tong, Bohan Zheng, Ziqi Yu, Ning Su, Yulong Zhang, Qixuan Mei, Yitong Ma. Digital design for determining nitrogen content in ammonium sulfate[J]. University Chemistry, ;2026, 41(7): 342-350. doi: 10.12461/PKU.DXHX202508083 shu

Digital design for determining nitrogen content in ammonium sulfate

Yanbin Tong ^1,, ,
Bohan Zheng ² ,
Ziqi Yu ¹ ,
Ning Su ¹ ,
Yulong Zhang ² ,
Qixuan Mei ¹ ,
Yitong Ma ¹

1.
College of Chemical Engineering, Daqing Normal University, Daqing 163712, Heilongjiang Province, China;
2.
School of Mechatronics Engineering, Daqing Normal University, Daqing 163712, Heilongjiang Province, China

Corresponding author: Yanbin Tong, tongyanbin163@163.com
Received Date: 25 August 2025
Revised Date: 5 November 2025

In analytical chemistry laboratory instruction, the conventional formaldehyde method for determining nitrogen content in ammonium sulfate presents two significant drawbacks: formaldehyde’s toxicity poses safety concerns for student experiments, and visual endpoint determination using phenolphthalein indicator introduces observational errors. This study implements an innovative digital approach to address these limitations. The experimental setup incorporates a robotic arm-controlled burette system integrated with pH sensors for intelligent endpoint detection, with all procedures conducted within a fume hood. Results demonstrate the digital method’s superior precision, showing a relative standard deviation of 0.42% for nitrogen content determination and a confidence interval of 20.13% to 20.33% for the overall mean. Statistical analysis reveals significantly better precision compared to manual titration (p<0.05). This digital design demonstrates broad applicability for titration experiments and offers valuable implementation potential for chemistry education.
- Titration analysis,
- Ammonium sulfate,
- Digital design,
- Formaldehyde method
1. [1]
2. [2]
3. [3]
4. [4]
5. [5]
6. [6]
7. [7]
8. [8]
9. [9]
10. [10]
1. [1]
  Siyi Deng , Le Li , Guanghui Chen , Shunze Zhan . Sources of Titration Endpoint Error and Their Practical Significance. University Chemistry, 2026, 41(4): 433-437. doi: 10.12461/PKU.DXHX202502067
2. [2]
  Lu Zheng , Yueying Sun , Xin Ding , Jitao Liu . Preparation of 3D Printed Metamaterials Based on Molecular Design. University Chemistry, 2026, 41(1): 253-263. doi: 10.12461/PKU.DXHX202506019
3. [3]
  Jian Huang , Mingjue Zhang , Shangchu Ma , Jia Dong , Guanzi Wu , Aiming Wen , Zhuoliang Liu . Data-Driven Approach for the Determination of Chemical Reaction Rate Constant. University Chemistry, 2026, 41(1): 213-226. doi: 10.12461/PKU.DXHX202505110
4. [4]
  Zhican Lu , Junyu Li , Zijun Huang , Ziyi Zeng , Chi Huang , Chuqing Gong , Yalan Zhong . Digital Experimental Design of Decomposition of Ammonium Perchlorate Catalyzed by MOFs. University Chemistry, 2026, 41(1): 133-143. doi: 10.12461/PKU.DXHX202506017
5. [5]
  Jiaqi Chen , Liang Chen , Xiaocui Wei , Yankai Wang , Yahui Chang , Xinghao Ji , Haoyu Yang , Yue Sun , Yawen Wang , Xiufeng Shi , Xu Wu . Digital Empowerment for Foundational Excellence: A Digitally Enhanced Coordination Titration Experiment of Heating Pack Component Analysis. University Chemistry, 2026, 41(1): 382-393. doi: 10.12461/PKU.DXHX202506008
6. [6]
  Juan Hou . Reflection on the Innovation and Practice of Course Ideological and Political Education Teaching Design under the Digitalization Context: A Case Study of Analytical Chemistry Course. University Chemistry, 2026, 41(4): 90-97. doi: 10.12461/PKU.DXHX202502038
7. [7]
  Xinhao Yan , Guoliang Hu , Ruixi Chen , Hongyu Liu , Qizhi Yao , Jiao Li , Lingling Li . Polyethylene Glycol-Ammonium Sulfate-Nitroso R Salt System for the Separation of Cobalt (II). University Chemistry, 2024, 39(6): 287-294. doi: 10.3866/PKU.DXHX202310073
8. [8]
  Simin Fang , Hong Wu , Wei Liu , Wei Wei , Hongyan Feng , Wan Li . Construction and Application of Teaching Resources for Inorganic and Analytical Chemistry Experimental Course in the Context of Digital Empowerment. University Chemistry, 2024, 39(10): 156-163. doi: 10.3866/PKU.DXHX202402053
9. [9]
  Hui Shi , Shuangyan Huan , Yuzhi Wang . Ideological and Political Design of Potassium Permanganate Oxidation-Reduction Titration Experiment. University Chemistry, 2024, 39(2): 175-180. doi: 10.3866/PKU.DXHX202308042
10. [10]
  Jihua Deng , Xinshi Wu , Dichang Zhong . Exploration of Green Teaching and Ideological and Political Education in Chemical Experiment of “Preparation of Ammonium Ferrous Sulfate”. University Chemistry, 2024, 39(10): 325-329. doi: 10.12461/PKU.DXHX202405046
11. [11]
  Jingjie Rao , Wenwen Cai , Jiahui Zhao , Xu Yang , Ziyan Yan , Tianjin Zhang , Hang Zhang . Digital Exploration of Analytical Chemistry Experiments in the Context of Machine Learning and Big Data: A Case Study on Water Hardness Measurement. University Chemistry, 2026, 41(1): 276-288. doi: 10.12461/PKU.DXHX202504104
12. [12]
  Pan He , Junlin Yan , Zhigang Chen , Enming Dai , Xin Zhao , Ruijuan Wang . Design of Digital Experiment for Field Emission Scanning Electron Microscopy Based on Semi-Physical Simulation. University Chemistry, 2026, 41(1): 114-121. doi: 10.12461/PKU.DXHX202505104
13. [13]
  Shoulei Zhang , Yu Wang , Zicheng Shuai , Yanbing Bi , Qiangsheng Li , Xijie Lan , Xiaojie Gu , Bing Xu . Innovative design of ammonium ferrous sulfate preparation experiment from the perspective of chemistry “101 plan”: crystal morphology control and smart observation integration. University Chemistry, 2026, 41(6): 230-236. doi: 10.12461/PKU.DXHX202508002
14. [14]
  Juan Hou , Chen Zhou , Jing Sun . Teaching Design of the Classical Analytical Chemistry Content Based on Logical and Innovative Thinking: A Case Study of the Application of Acid-Base Titration Method. University Chemistry, 2024, 39(4): 221-226. doi: 10.3866/PKU.DXHX202310023
15. [15]
  Qinglin Yang , Yonghai Yue , Kesong Liu , Lidong Li , Tianyi Zhao , Wei Zhou , Dongyu Zhao , Yuzhen Ning . Teaching design and practice in analytical chemistry based on “graphic teaching method + problem-based learning”: taking coordination titration as an example. University Chemistry, 2026, 41(6): 84-91. doi: 10.12461/PKU.DXHX202510004
16. [16]
  Tangsheng Guan , Ruizhi Yang , Pingyue Geng , Yuhong Lin , Shui Hu , Xiaojuan Chen , Houjin Li , Yong Shen . Innovative Digital Experiments for Glutathione-Targeted Anticancer Drugs in Redox Systems. University Chemistry, 2026, 41(1): 144-158. doi: 10.12461/PKU.DXHX202505028
17. [17]
  Ruoyu Cao , Jiaxin Chen , Jiaen Hu , Youting Zhai , Jiacong Fu , Lifen Hou , Xuebin Yan , Yanyang Li , Kai Li , Shuangquan Zang . Interactive Digital Experiment for Organic Synthesis: Designing Process and Case Presentation. University Chemistry, 2026, 41(1): 406-412. doi: 10.12461/PKU.DXHX202504022
18. [18]
  Laiying Zhang , Weitai Wu , Ruming Yuan , Yuan Chun , Liang Qiao , Ning Fang , Jie Lei , Weigao Xu , Xinhua Xu , Zhimin Zhang , Chengbin Zheng , Pingping Zhu , Jiawei Yan , Bin Ren . Design and construction of digital textbook of dynamic electronic curriculum plan for chemical measurement experiment under the “101 Plan”. University Chemistry, 2026, 41(6): 237-243. doi: 10.12461/PKU.DXHX202512039
19. [19]
  Ningyuan Chen , Qingyi Zeng , Zhiqiang Kuang , Peicong Tian , Dazhi Yan , Weiliang Jin , Deming Kong . Digital-Assisted Experimental Study on Dye Adsorption by Porous Materials. University Chemistry, 2026, 41(1): 321-331. doi: 10.12461/PKU.DXHX202504072
20. [20]
  Xianjiao Meng , Yujiao Ma , Wang Li , Xi Zhao , Yiming Wang , Fugui Wang , Yongpo Zhang , Jinzhong Zhao . Experimental Teaching Design of Extracting Capsanthin from Chili Peppers: A Digital Perspective. University Chemistry, 2025, 40(11): 233-240. doi: 10.12461/PKU.DXHX202412118

Get Citation

PDF

XML

Metrics

PDF Downloads(1)
Abstract views(87)
HTML views(19)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Address：Zhongguancun North First Street 2,100190 Beijing, PR China Tel: +86-010-82449177-888

DownLoad: Full-Size Img PowerPoint

Return