Advance 3 500 nmr spectrometer

The concentrations of C, H, and N of the final product were measured by Elementar-Vario elemental analyzer (Elementar Co., Germany). The purity and yield can be calculated by Eq 1 and Eq 2, respectively. Fourier Transform Infrared Spectrum (FT-IR) of the synthesized tert-octylsalicylaldoxime was surveyed from 400 to 4000 cm⁻¹ by AVATR-360 FT-IR infrared spectrophotometer (Nicolet Co., United States) using KBr pellet technique. The ¹H NMR (Nuclear Magnetic Resonance) and ¹³C NMR spectroscopy of the final product were obtained by ADVANCE III 500 NMR spectrometer (Bruker Co., Germany) using deuterium chloroform as solvent. The mass spectrometry was recorded by a GCMS-QP2010 analyzer (Japan) (Li et al., 2019 (link); Wang et al., 2019 (link)). $\text{Purity}\left(\text{\%}\right)=\frac{\text{The}\text{measured}\text{concentration}\text{of}\text{N}}{\text{The}\text{theoretical}\text{concentration}\text{of}\text{N}}\times 100\%.$
$\text{Yield}\left(\text{\%}\right)=\frac{\text{The}\text{real}\text{product}\text{weight}}{\text{The}\text{theoretical}\text{product}\text{weight}}\times \mathrm{100\%}\mathrm{.}$