Citation: Yuan Yang, Xiaoli Wu, Hanshuang Li, Yurong Deng, Chengbin Zheng. Determination of selenite and organoselenium in water using GC coupled with a 3D-printed point discharge atomic emission detector and HS-SPME[J]. Chinese Chemical Letters, ;2026, 37(8): 112298. doi: 10.1016/j.cclet.2025.112298 shu

Determination of selenite and organoselenium in water using GC coupled with a 3D-printed point discharge atomic emission detector and HS-SPME

Yuan Yang ^a ,
Xiaoli Wu ^a ,
Hanshuang Li ^a ,
Yurong Deng ^{b, *,} ,
Chengbin Zheng ^{b, *,}

a.
Sichuan Provincial Engineering Research Center of Molecular Targeted Diagnostic & Therapeutic Drugs, School of Science, Xihua University, Chengdu 610039, China
b.
Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University, Chengdu 610065, China

ydeng@scu.edu.cn

abinscu@scu.edu.cn

Received Date: 22 July 2025
Revised Date: 5 December 2025
Accepted Date: 17 December 2025
Available Online: 19 December 2025

Figures(3)

Selenium (Se) speciation analysis is typically performed using complex and costly hyphenated analytical systems. In this study, we developed a novel strategy for Se speciation using gas chromatography combined with a 3D-printed point discharge micro atomic emission detector (GC-PD-μAED), coupled with chemical vapor generation (CVG) and headspace-solid phase microextraction (HS-SPME), for the simultaneous determination of selenite (Se(Ⅳ)), dimethylselenide (DMSe) and dimethyldiselenide (DMDSe) in aqueous matrices. The method involves derivatization of Se(Ⅳ) to volatile diethylselenide (DEtSe) using NaBEt₄, followed by HS-SPME preconcentration of all three Se species prior to GC separation and PD-μAED detection at the Se emission line of 196.03 nm. The optimized method achieved limits of detection (LODs) of 2.34, 0.28 and 0.13 μg/L (as Se) for DMSe, DMDSe and Se(Ⅳ), respectively, with precision (RSD) ranging from 4.6% to 4.9%. The accuracy and practicability of the developed method were demonstrated through speciation analysis of Se in seven water samples with excellent recoveries (90.4%−107.9%). Moreover, this novel approach offers simplified instrumentation, significantly lower costs, and minimal use of consumables while maintaining robust analytical performance comparable to conventional methods, making it particularly valuable for resource-limited settings.
- Selenite,
- Organoselenium,
- Gas chromatography,
- Point discharge,
- Miniature atomic emission detector,
- HS-SPME
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沈阳化工大学材料科学与工程学院沈阳 110142