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Method development for determination of imatinib and its major metabolite, N ‐desmethyl imatinib, in biological and environmental samples by SA–SHS–LPME and HPLC
Author(s) -
Rahimi Kakavandi Nader,
Asadi Tayebeh,
Jannat Behrouz,
Abdi Khosrou,
GhaziKhansari Mahmoud,
Shahali Hossein,
Naraki Karim
Publication year - 2021
Publication title -
biomedical chromatography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 65
eISSN - 1099-0801
pISSN - 0269-3879
DOI - 10.1002/bmc.5088
Subject(s) - chemistry , triethylamine , chromatography , desmethyl , detection limit , high performance liquid chromatography , solid phase extraction , metabolite , organic chemistry , biochemistry
A salting‐out‐assisted switchable hydrophilicity solvent‐based liquid phase microextraction (SA–SHS–LPME) was developed for the separation and determination of trace amounts of imatinib and N‐ desmethyl imatinib in biological and environmental samples by HPLC–UV. Triethylamine as a hydrophobic compound and protonated triethylamine carbonate as a hydrophilic one were switched by the addition or elimination of CO 2 . The use of NaOH resulted in the elimination of CO 2 from the sample solution, which led to the conversion of P‐TEA‐C into triethylamine (TEA) and as a result, the analytes was extracted and entered the TEA phase. The salting out was performed to speed up the formation of the TEA in the shape of fine droplets in the specimen solution. Furthermore, the impact of several momentous factors that influence the recovery of the extraction was investigated. Under the optimum conditions, the limit of detection and limit of quantification were obtained in ranges of 0.03–0.05 and 0.1–0.15 μg L −1 for imatinib and 0.04–0.06 and 0.13–0.20 μg L −1 for N‐ desmethyl imatinib, respectively. The preconcentration factor was 250. Inter‐ and intraday precision (RSD, n = 5) was <5%. In the case of imatinib and N‐ desmethyl imatinib in biological and environmental specimens, a range of 97.0–102% was obtained as the recovery.