Post-modified chloro-functionalized covalent organic frameworks for micro-solid phase extraction of organochlorine pesticides

This dataset is derived from the raw experimental data of five organochlorine pesticides (heptachlorine, epoxy heptachlorine, 2,4 '- DDD, 2,4' - DDE, 2,4 '- DDT) in Yellow River water and agricultural irrigation water, prepared by chlorine functionalized two-dimensional covalent organic framework Cl COF and determined by micro solid-phase extraction gas chromatography electron capture detector (μ - SPE-GC-ECD). The experiment was completed at room temperature in the laboratory from September to December 2022. The experimental process includes solvent thermal synthesis of substrate TAPT-PTA-COF and chlorine modified Cl COF, and preparation of ground glass extraction slides; Using FT-IR, XRD, TGA, nitrogen adsorption desorption XPS、 The water contact angle test has been completed to characterize the material system; System optimization of key parameters for microsolid phase extraction (adsorbent dosage, ionic strength, extraction temperature, extraction time, elution solvent and elution volume); Establish a series of standard curves ranging from 0.10 to 1000 ng/L and complete methodological validation (linearity, detection limit LOD, quantification limit LOQ, intra/inter day precision, inter slide repeatability, enrichment factor); Conduct 30 adsorption desorption cycle stability tests and collect surface water from the Yellow River main stream and farmland irrigation channels in Lanzhou for three spiked recovery tests at levels of 1.0, 50, and 100 ng/L. The dataset is stored in an Origin table, with rows representing materials with different modification ratios, extraction condition gradients, standard concentration gradients, and parallel samples of actual water samples.

Columns include standard solution concentration (ng/L), chromatographic peak area, spiked theoretical concentration, measured concentration, recovery rate (%), RSD (%), etc; Samples below the quantification limit are labeled as ND and there are no large areas of missing data. The experimental error comes from the baseline fluctuations of weighing, pipetting, and gas chromatography ECD detector. The actual water sample spiked recovery rate is 89.0% to 105.5%, RSD＜12.8%。 The compressed file contains 5 types of files: 1.