容量法测定卤水中碘含量的不确定度评定

doi:10.11962/1006-4990.2019-0507

Abstract

Abstract:

In order to improve the accuracy of the volumetric method for the determination of iodine content in brine,the determination of iodine content by saturated bromine water method was evaluated.The source of uncertainty was summarized from three aspects,such as the preparation of potassium iodate standard solution,calibration of Na₂S₂O₃ standard solution and brine sample determination.The detailed evaluation process of uncertainty components in measurement of iodine content in brine was given by establishing mathematics model.Synthesis standard uncertainty and expanded uncertainty of iodine content were obtained by the uncertainty components.The uncertainty of measurement of iodine content in brine was 17.52±0.116 mg/L in the level of 95% confidence level.

Key words: brine, iodine content, uncertainty of measurement

CLC Number:

TQ124.61

Yu Lijuan,Li Guangyi,Yuan Yuxia,Yan Xiuzheng. Uncertainty evaluation in determination of iodine content in brine by volumetric method[J]. Inorganic Chemicals Industry, 2020, 52(8): 84-87.

元素	原子量	引用不确定度	标准不确定度
K	39.098 30	±0.000 10	0.000 058
I	126.904 47	±0.000 03	0.000 017
O	15.999 40	±0.000 30	0.000 170

序号	V₃ /mL	c（Na₂S₂O₃）/ （mol·L^-1）	序号	V₃ /mL	c（Na₂S₂O₃）/ （mol·L^-1）
1	25.12	0.001 991	6	25.10	0.001 993
2	25.13	0.001 991	7	25.13	0.001 991
3	25.08	0.001 995	8	25.12	0.001 991
4	25.12	0.001 991	平均值	25.11	0.001 992
5	25.08	0.001 995

序号	V₃ /mL	ρ_（I）/（mol·L^-1）	序号	V₃ /mL	ρ_（I）/（mol·L^-1）
1	20.78	17.51	5	20.83	17.55
2	20.72	17.46	6	20.78	17.51
3	20.85	17.57	平均值	20.79	17.52
4	20.80	17.53

[1]	QB 2829—2006 螺旋藻碘盐[S].
[2]	Ramebäck H, Lindgren P. Uncertainty evaluation in gamma spectrometric measurements:Uncertainty propagation versus Monte Carlo simulation[J].Applied Radiation and Isotopes, 2018,142(12):71-76. doi: 10.1016/j.apradiso.2018.09.024
[3]	JJG1036—2008 电子天平[S].
[4]	JJG196—2006 常用玻璃量器检定规程[S].

[1]	YANG Yousheng, YAO Zhihao, ZHAO Zhixing, FENG Xia, ZENG Ying, YU Xudong. Research progress of lithium-rich sulfate type salt lake brine evaporation experiment [J]. Inorganic Chemicals Industry, 2024, 56(4): 1-7.
[2]	SU Xin, LAI Dongmei, ZHOU Yuan, ZHU Xiaping. Study on preparation process of strontium rich functional salt from Zigong underground brine [J]. Inorganic Chemicals Industry, 2024, 56(3): 45-50.
[3]	LI Zhiwei, FU Zhenhai, ZHANG Zhihong, LI Shengting. Prediction model of brine evaporation rate based on back-propagation neural network [J]. Inorganic Chemicals Industry, 2024, 56(1): 53-58.
[4]	CHEN Haixia, YAN Hong, SUN Yunlong, MA Guoqiang. Research progress of lithium resource extraction technology [J]. Inorganic Chemicals Industry, 2024, 56(1): 9-22.
[5]	FU Yu, DENG Mi, HUANG Donggen, WAN Jinbao. Research progress of lithium extraction technology from salt lake brine [J]. Inorganic Chemicals Industry, 2023, 55(9): 9-16.
[6]	LU Nana, QIN Yaru, MA Shuqing, WANG Qihui, LIU Bing, SHI Chenglong. Study on extraction of lithium from simulated old brine of salt lake by pyridine ionic liquid system [J]. Inorganic Chemicals Industry, 2023, 55(7): 45-50.
[7]	MA Xue, ZHOU Yuan, HUANG Chao, ZHU Xiaping. Study on preparation process of high purity calcium citrate from Zigong underground yellow brine [J]. Inorganic Chemicals Industry, 2023, 55(4): 60-64.
[8]	CUI Xiangmei, PAN Tongtong, LUO Qinglong, BIAN Fuxuan, YE Xiushen. Preparation of amino alcohol modified GO/CNTs composite aerogel and boron adsorption from salt lake brines [J]. Inorganic Chemicals Industry, 2023, 55(12): 59-65.
[9]	ZHU Ruisong, CAO Jing, LIU Taoran, LI Yingwen, GAO Fei, HU Xuesheng. Research progress of lithium extraction technology and industrialization of unconventional brines in global [J]. Inorganic Chemicals Industry, 2023, 55(11): 1-11.
[10]	LAI Xianrong, CHEN Zhouqin, SUN Hao, YANG Chao. Pilot study on lithium extraction by adsorption from raw brine of magnesium sulfate subtype salt lakes in Tibet [J]. Inorganic Chemicals Industry, 2023, 55(11): 86-92.
[11]	YU Jianguo,SUN Qing,QIU Shengbo,ZHANG Yiren,CHEN Jun. Lithium resources development supporting national new energy strategy development [J]. Inorganic Chemicals Industry, 2023, 55(1): 1-14.
[12]	LIN Yuqing,ZHANG Yiren,QIU Yulong,ZHANG Jiayu,YU Jianguo. Progress and prospect of membrane technology in lithium extraction from salt lake brine [J]. Inorganic Chemicals Industry, 2023, 55(1): 33-45.
[13]	SU Jianjun,ZENG Ying,LI Longgang,QIN Jiazheng,YU Mingxiang,LIU He. Study on isothermal evaporation of potassium?extracted old brine and frozen brine in West Taijinar Salt Lake at 25 ℃ [J]. Inorganic Chemicals Industry, 2022, 54(5): 84-89.
[14]	WU Liping,YUAN Hongzhan,JIN Fang. Study on natural evaporation experimental of deep brine in Yahu structure [J]. Inorganic Chemicals Industry, 2022, 54(11): 71-78.
[15]	NIE Zhen,WU Qian,DING Tao,BU Lingzhong,WANG Yunsheng,YU Jiangjiang,HOU Xianhua. Research progress on industrialization technology of lithium extraction from salt lake brine in China [J]. Inorganic Chemicals Industry, 2022, 54(10): 1-12.

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Uncertainty evaluation in determination of iodine content in brine by volumetric method

RichHTML

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

Figures/Tables 3

References 4

Related Articles 15

Metrics

Comments

Recommended 0