Determination of Boron in Refractories

doi:10.19691/j.cnki.1004-4493.2020.02.007

China's Refractories ›› 2020, Vol. 29 ›› Issue (2): 37-41.DOI: 10.19691/j.cnki.1004-4493.2020.02.007

• Original article • Previous Articles Next Articles

Determination of Boron in Refractories

WANG Yanni, HAN Dan, LEI Xiaoyu, ZHANG Yajing

Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, China

Revised:2021-05-13 Online:2020-06-15 Published:2020-06-15
About author:Wang Yanni, born in 1986, gained her bachelor's degree from Zhengzhou University in 2009 and master's degree from University of Science and Technology Beijing in 2012, majored in material science and technology. Since then, she has been working in Sinosteel Luoyang Institute of Refractories Research Co., Ltd.

Abstract

Abstract:

Refractory materials have been widely used in high-temperature industries, in which the boron content has a great influence on the performance. To control the detection quality and satisfy the requirement of production and scientific research of refractories, conditional tests involving three methods for the boron determination (alkali titrimetry, inductively coupled plasma atomic emission spectrometry (ICP-AES), and curcumin absorption spectrophotometry) were carried out in this work. The affecting factors on the determination of boron were analyzed and discussed by performing the experiment. The results show that compared with curcumin absorption spectrophotometry, alkali titrimetry and ICP-AES have the advantages of simple operation, quick analysis and high precision (relative standard deviation <5%), which are more appropriate for boron determination in refractories.

Key words: refractories, boron, determination, alkali titrimetry, inductively coupled plasma atomic emission spectrometry, curcumin absorption spectrophotometry

WANG Yanni, HAN Dan, LEI Xiaoyu, ZHANG Yajing. Determination of Boron in Refractories[J]. China's Refractories, 2020, 29(2): 37-41.

Figures/Tables 9

References 10

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Methods	Recovered B₂O₃ /mg	Average value /mg	Relative standard deviation (n=6) /%
Method 1	9.96, 9.95, 9.99, 9.98, 9.96, 9.98	9.97	0.16
Method 2	9.97, 9.96, 9.95, 9.98, 9.97, 9.95	9.96	0.12

Methods	Recovered B₂O₃ /mg	Average value /mg	Relative standard deviation (n=6) /%
Method 1	9.96, 9.95, 9.99, 9.98, 9.96, 9.98	9.97	0.16
Method 2	9.97, 9.96, 9.95, 9.98, 9.97, 9.95	9.96	0.12

Reference materials	Measured value /%	Average value /%	Certified value /%	Relative standard deviation (n=6) /%
BCS372	2.36, 2.34, 2.35, 2.35, 2.34, 2.32	2.34	2.35	0.58
YSB1674-05	5.70, 5.68, 5.71, 5.69, 5.70, 5.66	5.69	5.65	0.31
GBW03132	8.87, 8.80, 8.81, 8.84, 8.88, 8.86	8.84	8.87	0.37

Reference materials	Measured value /%	Average value /%	Certified value /%	Relative standard deviation (n=6) /%
BCS372	2.36, 2.34, 2.35, 2.35, 2.34, 2.32	2.34	2.35	0.58
YSB1674-05	5.70, 5.68, 5.71, 5.69, 5.70, 5.66	5.69	5.65	0.31
GBW03132	8.87, 8.80, 8.81, 8.84, 8.88, 8.86	8.84	8.87	0.37

Reference materials	Measured value /mass%	Average value /mass%	Certified value /mass%	Relative standard deviation (n=6) /%
BCS389	0.027, 0.029, 0.029, 0.028, 0.027, 0.026	0.028	0.029	4.38
BCS396	0.089, 0.092, 0.090, 0.091, 0.088, 0.090	0.090	0.09	1.57
JRRM301	0.82, 0.84, 0.89, 0.90, 0.91, 0.87	0.87	0.87	4.07
BCS372	2.30, 2.28, 2.38, 2.31, 2.34, 2.40	2.34	2.35	2.02
GBW03132	8.76, 8.81, 8.90, 8.84, 8.85, 8.79	8.82	8.87	0.56

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m (B₂O₃) /μg		0	1	2	3	4	5
Absorbance	100 mL dish	0.125	0.181	0.223	0.270	0.296	0.340
Absorbance	250 mL dish	0.094	0.389	0.438	0.514	0.552	0.671

m (B₂O₃) /μg		0	1	2	3	4	5
Absorbance	10 min	0.063	0.234	0.379	0.489	0.482	0.589
	30 min	0.060	0.234	0.381	0.491	0.476	0.593
	60 min	0.062	0.233	0.380	0.491	0.481	0.592

m (B₂O₃) /μg		0	1	2	3	4	5
Absorbance	Batch 1	0.037	0.189	0.241	0.291	0.482	0.589
Absorbance	Batch 2	0.071	0.220	0.285	0.345	0.501	0.629

Reference materials	Measured value /mass%	Average value /mass%	Certified value /mass%	Relative standard deviation (n=6) /%
BCS389	0.024, 0.022, 0.025, 0.022, 0.026, 0.024	0.024	0.029	6.72
BCS396	0.089, 0.086, 0.092, 0.090, 0.085, 0.094	0.089	0.090	3.86
JRRM301	0.88, 0.86, 0.90, 0.91, 0.86, 0.94	0.89	0.87	3.50

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