Chromatography column: LB-WAX MS (30m × 0.25 mm, 0.25 μ m)

Item number: LBWAXP-30-25-25

Instrument: GC-MS/MS Agilent 8890-700D

Injection port temperature: 220 ℃

Carrier gas: helium, purity ≥ 99.999%, flow rate 1.0mL/min

Injection method: non split injection;

Injection volume: 1 μ L

Column temperature: Initial temperature of 40 ℃, heated to 80 ℃ at a rate of 10 ℃/min, then heated to 100 ℃ at a rate of 2 ℃/min, and finally heated to 240 ℃ at a rate of 20 ℃/min, and maintained for 2 minutes.

Mass spectrometry conditions:

Ionization method: EI; Ion source temperature: 250 ℃; Measurement method: MRM

Under this condition, both NDMA and its internal standard NDMA-D6 obtained analysis results with sharp peak shapes and good separation, meeting the requirements of the national standard.

LUBEX LB-WAX MS domestic gas chromatography column, matched with standard requirements, adopts special inerting process to ensure low column loss, providing a stable and low-noise detection environment for GC-MS/MS system, effectively extending instrument maintenance cycle and ensuring long-term reliability of data.