HJ 1072-2019 Determination of Pyridine in Water Quality - Headspace/Gas Chromatography MethodIt will be officially implemented on June 30, 2020. This standard has added a description of the method principle, normative references, quality control and assurance, waste disposal, and precautions compared to the "Determination of Pyridine in Water Quality by Gas Chromatography" (GB/T 14672-1993). The chromatographic column has been changed from a packed column to a capillary column, manual injection has been changed to a fully automatic headspace sampler, and quantification has been performed using the standard curve external standard method.

Introduction to the method of analyzing pyridine in water quality by headspace gas chromatography:

At a certain temperature, pyridine in the water sample in the headspace bottle evaporates upwards and reaches thermodynamic dynamic equilibrium in the gas-liquid phase. Pyridine in the gas phase is separated by gas chromatography, detected by hydrogen flame ionization detector, qualitatively determined by retention time, and quantitatively determined by external standard method

Instrument conditions:

1. FID hydrogen flame ionization detector

2. Capillary injection system

3. Headspace sampler

4. Capillary chromatography column (30 meters)

This standardScope of Application

This standard specifies the headspace determination of pyridine in water/Gas chromatography method.

This standard is applicable for the determination of pyridine in surface water, groundwater, domestic sewage, and industrial wastewater.

When the sampling volume is10.0 mlWhen, the detection limit of the method is0.03 mg/LThe lower limit of determination is0.12 mg/L.