PMID- 38503706
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240322
IS  - 1872-2059 (Electronic)
IS  - 1000-8713 (Print)
IS  - 1000-8713 (Linking)
VI  - 42
IP  - 3
DP  - 2024 Mar 8
TI  - [Determination of trace anions in battery-grade lithium carbonate by 
      double-inhibition on-line matrix-removal ion chromatography].
PG  - 291-295
LID - 10.3724/SP.J.1123.2023.10003 [doi]
AB  - A method was developed for the determination of trace anions in battery-grade 
      lithium carbonate. In this method, lithium carbonate was dissolved in ultrapure 
      water with ultrasound assistance, and its matrix was removed using an on-line 
      matrix-removal method. In the matrix-removal process, the sample was first passed 
      through an ADRS600(4 mm) suppressor (suppressor current, 150 mA; external water 
      flow rate, 2 mL/min). Hydrogen and lithium ions were then completely exchanged 
      via the ion-exchange membrane in the suppressor, converting the lithium carbonate 
      into carbonic acid. The carbonic acid entered the waste-liquid channel in the 
      form of carbon dioxide through a CRD 200(4 mm) carbonate removal device to remove 
      the lithium carbonate matrix. Finally, the target anions were automatically 
      enriched on an IonPac UTAC-LP2 concentration column (35 mmx3 mm) and 
      automatically transferred to a chromatographic system using valve-switching 
      technology. The chromatographic system featured an IonPac AG18 column (50 mmx2 
      mm) as the protection column and an IonPac AS18 column (250 mmx2 mm) as the 
      analytical column. The column temperature was 30 ℃, gradient elution was 
      performed using KOH solution as the eluent, and the pump flow rate was 0.30 
      mL/min. An ADRS600(2 mm) suppressor, suppressor current of 25 mA, injection 
      volume of 250 muL, and conductance detector were also used. The results showed 
      good linear relationships (r>/= 0.999) for F(-), Cl(-), [Formula: see text] in 
      their respective concentration ranges. The limits of detection (LODs) and 
      quantification (LOQs) were 0.05-0.88 and 0.15-2.92 mug/L, respectively. Lithium 
      carbonate samples were tested six consecutive times, and the relative standard 
      deviations (RSDs) of the peak areas of each ion were less than 0.73%. The same 
      lithium carbonate samples were injected after 0, 2, 4, 8, 12, 18, and 24 h, and 
      the RSD of the peak areas of each ion was less than 0.96%. The average recoveries 
      ranged from 93.3% to 99.3%, and the RSDs (n=6) of samples spiked at three levels 
      were in the range of 0.97%-3.45%. The proposed method has a low method limit of 
      quantification of only 0.5 mg/kg for each ion analyzed and is capable of the 
      simultaneous analysis of multiple ions. Thus, it is suitable for the detection of 
      trace anions in battery-grade lithium carbonate.
FAU - Wu, Gang
AU  - Wu G
AD  - Chia Tai Tianqing Pharmaceutical Group Co., Ltd., Lianyungang 222062, China.
FAU - Wu, Guo-Quan
AU  - Wu GQ
AD  - null.
LA  - chi
PT  - English Abstract
PT  - Journal Article
PL  - China
TA  - Se Pu
JT  - Se pu = Chinese journal of chromatography
JID - 9424804
SB  - IM
PMC - PMC10951807
OTO - NOTNLM
OT  - anions
OT  - double-inhibition
OT  - ion chromatography (IC)
OT  - lithium carbonate
OT  - on-line matrix-removal
EDAT- 2024/03/20 00:42
MHDA- 2024/03/20 00:43
PMCR- 2024/03/08
CRDT- 2024/03/19 23:23
PHST- 2024/03/20 00:43 [medline]
PHST- 2024/03/20 00:42 [pubmed]
PHST- 2024/03/19 23:23 [entrez]
PHST- 2024/03/08 00:00 [pmc-release]
AID - 10.3724/SP.J.1123.2023.10003 [doi]
PST - ppublish
SO  - Se Pu. 2024 Mar 8;42(3):291-295. doi: 10.3724/SP.J.1123.2023.10003.