Spectral and theoretical analysis of derivatives of 1,2,3,3-tetramethyl-3H-indolium iodide (TMI), a highly selective derivatization reagent of cyanide, and their utility for the analysis of cyanide concentrations in beverages.
Keiji NishiwakiYasuhiro MorikawaShigeo SuzukiKazutaka ShiomiIsao NakanishiPublished in: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry (2023)
We develop a specific derivatization gas chromatography-mass spectrometry (GC-MS) method for cyanide using 1,2,3,3-tetramethyl-3H-indium iodide as the derivatization reagent. The derivative compounds were synthesized and characterized using 1 H nuclear magnetic resonance (NMR), 13 C NMR, and Fourier transform infrared (FT-IR) spectroscopy. The high selectivity of this derivatization for cyanide is supported by calculations and activation energy comparisons. We applied this method to pure water, green tea, orange juice, coffee cafe au lait, and milk. Derivatization was performed by diluting 20 μL of sample solution with 0.1 M NaOH and adding 100 μL of saturated borax solution and 100 μL of 8 mM TMI solution, each drink was completed in 5 min at room temperature, and selected ion (m/z = 200) monitoring analysis was linear (R 2 > 0.998) at 0.15 to 15 μM, with detection limits of 4-11 μM were shown. This method is expected to be widely used in forensic toxicology analysis and can be applied to beverages, which are forensically important field samples.
Keyphrases
- gas chromatography mass spectrometry
- magnetic resonance
- gas chromatography
- ms ms
- high performance liquid chromatography
- solid state
- room temperature
- liquid chromatography tandem mass spectrometry
- solid phase extraction
- high resolution
- fluorescent probe
- liquid chromatography
- simultaneous determination
- tandem mass spectrometry
- mass spectrometry
- ultra high performance liquid chromatography
- magnetic resonance imaging
- molecular dynamics
- high resolution mass spectrometry
- density functional theory
- loop mediated isothermal amplification
- single molecule
- optical coherence tomography
- sensitive detection
- computed tomography
- reduced graphene oxide
- gold nanoparticles
- visible light