离子色谱法测定废旧锂电池湿法浸出液中氟和氯

doi:10.19964/j.issn.1006-4990.2020-0483

Abstract

Abstract:

An method for simultaneous determination of fluorine and chlorine in leaching solution in waste lithium battery by ion chromatography was established.The fluorine and chlorine were separated and enriched by water steam distillation method at 160~180 ℃ with high-boiling sulfuric acid as distillation medium and absorbed by sodium hydroxide absorption solution, which could eliminate the interference caused by organic compounds and coexisting metal ions in the leaching solution.After passing through the 0.22 μm filter membrane,the fluorine and chlorine in absorption solution were separated with high-capa-city AS23 type anion analytical column and detected by conductivity detector using the mixture solution of 4.5 mmol/L Na ₂CO₃-1.0 mmol/L NaHCO₃ as eluent.The results showed that the fluorine and chlorine showed a good linear correlation with their corresponding peak areas in the concentration range of 0.1~10.0 mg/L with correlation coefficient of 0.999 8 and 0.999 6,respectively.The proposed method was applied to the determination of fluorine and chlorine in leaching solution in waste lithium battery with satisfactory results,registering the standard addition recovery of 95.47% and 96.29% with the relative standard deviations（RSD, n=10） of 2.9% and 3.7%, respectively.The result was satisfactory.

Key words: ion chromatography, waste lithium battery, leaching solution, fluorine, chlorine

CLC Number:

TQ131.11

Xie Tangfeng,Chen Ruokui,Cai Luorong,Wang Ming,Jiang Kuailiang. Determination of fluorine and chlorine in leaching solution in waste lithium battery by ion chromatography[J]. Inorganic Chemicals Industry, 2021, 53(7): 101-104.

Figures/Tables 7

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References 12

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离子	测定值/（mg·L^-1）					平均值/ （mg·L^-1）	相对标准偏差（RSD）/%	参考值/ （mg·L^-1）
F^-	35.81	30.02	33.76	29.36	33.92	31.46	2.9	32
F^-	28.25	27.35	33.92	32.76	29.45	31.46	2.9	32
Cl^-	348.64	349.03	342.56	340.87	341.75	344.72	3.7	350
Cl^-	346.93	341.35	346.78	339.98	349.29	344.72	3.7	350

离子	测定值/ （mg·L^-1）	加标量/ （mg·L^-1）	测定总量/ （mg·L^-1）	回收率/ %
F^-	29.58	30	58.22	95.47
Cl^-	362.75	360	709.37	96.29

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Inorganic Acid-Base-Salt Committee of CIESC

Determination of fluorine and chlorine in leaching solution in waste lithium battery by ion chromatography

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