Zhao Jianxin

Analysis and Testing Centre

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Co-Authors

Daming Fan

Jiangnan University

Hao Zhang

Southern Medical University

Yishu Gao

Southeast University

Anjiang Shen

China National Petroleum Corporation (China)

Pang Ke

Chen Wei

Northeastern University

Ting Cheng

Institut National de la Recherche Scientifique

Shenyan Ma

Jiangnan University

Anping Hu

China National Petroleum Corporation (China)

Huang Luelue

Shenzhen Polytechnic

Cooperative Institutions

Jiangnan University

State Key Laboratory of Food Science and Technology

Research Institute of Petroleum Exploration and Development

China National Petroleum Corporation (China)

Wuxi Institute of Technology

Chinese Academy of Sciences

Zhejiang University

The Synergetic Innovation Center for Advanced Materials

Dalian Medical University

Nanjing Medical University

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Uncertainty Evaluation on Measurement Results for Tungsten in Tin Concentrates by Thiocyanate-Tin(II) Chloride Dehydrate Spectrophotometric method

Journal of Xinjiang Normal University (2011)

Zhao Jianxin

The measurement uncertainty of the analytical results for tungsten in tin concentrates with tin(Ⅱ) chloride dihydrate as reducing agent by thiocyanate spectophotometric method was evaluated and the mathematic model for uncertainty expression was established.The total uncertainty mainly came from the sub-uncertainties of samples preparing process,volume,measurement results,repetitive experiments,conversion constant 0.7931,reagent blanks,etc.The uncertainty expression and mathematical models for calculating each parameter were proposed.And the extend uncertainty for the method was obtained from the combined uncertainty multiplied by extended factor of 2.When the average content of W in the samples was 208.5 μg/g,the expanded uncertainty was 8.0 μg/g.

Thiocyanate

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Experimental Study on the Relationship between Uranium(VI) and Total Uranium in Uranium Ores and Uranium-bearing Rocks

Rock and Mineral Analysis (2010)

Zhao Jianxin

The effect of sample digestion time and temperature on the determination of U(Ⅵ) and U(Ⅳ) in uranium ores and uranium-bearing rocks was carried out.And the relationship between U(Ⅵ) and total uranium in samples with both high(≥100 μg/g) and low(≤100 μg/g) contents of uranium was also discussed.The results indicate that U(Ⅵ) and U(Ⅳ) can be extracted and determined effectively under digestion temperature of 65℃ in 3 hours.The content of total uranium equals to the sum of U(Ⅵ) and U(Ⅳ) for the samples with high uranium content(≥100 μg/g).However,the content of U(Ⅵ) can be expressed as an equation of w=(A560/A584)×w(Utotal) for the samples with low uranium content(≤100 μg/g),which can be used to calculate the contents of U(Ⅵ) and U(Ⅳ) in the samples when total content of uranium is obtained by the determination at different wavelengths,which greatly simplifies the analysis procedure and improves the analysis efficiency.

Uranium ore

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Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry in situ U-Pb dating and its application to diagenesis-porosity evolution of carbonate reservoirs

石油勘探与开发 (2019)

Anjiang Shen Anping Hu Ting Cheng Feng Liang Pan Wenqing

Laser Ablation

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Analysis of fatty acids and small-molecule substances in quinoa from different areas by gas chromatography-mass spectrometry.

Food Science (2019)

Min Guo LU Hengqian Shunhe Wang Chen Wei Zhao Jianxin

10.7506/spkx1002-6630-20180928-315

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The influence of microwave irradiation on the thermal radical generation and storage behavior of the product of brown rice powder process

Shipin yu Fajiao Gongye (2016)

Lu-fen Lin Hu Bo Yishu Gao Huang Luelue Daming Fan

Brown rice

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Applications of microwave assisted technique in protein research

Science and Technology of Food Industry (2012)

Shenyan Ma Daming Fan Zhao Jianxin Pang Ke Wei Chen

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Improvement of Precision for Molybdenum Determination in Uranium Ores by Potassium Thiocyanate Spectrophotometric Method

Rock and Mineral Analysis (2010)

Zhao Jianxin

Based on the national standard analytical method for determination of molybdenum in uranium ores(GB/T 14353.9—1993) and using stannous chloride as reducing agent,potassium thiocyanate as a complexing agent and synthesized national grade I spectral silicate reference material as standard sample,the effects of different sample digestion methods and acid media on detection limit of molybdenum were studied.The determination parameters of molybdenum in uranium ores by thiocyanate spectrophotometry were further optimized.The detection limit of the method for Mo was as low as 10.0 μg/g with the advantages of high reliability and simple operation.The method has been applied to the determination of Mo in uranium ores and the results are in agreement with those by ICP-AES.

Thiocyanate

Potassium thiocyanate

Spectrophotometry

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