4-OP, 4-NP, BPA, and [D.sub.16]-bisphenol A ([D.sub.16]-BPA) were purchased form Dr Ehrenstorfer GmbH (Germany), and silicone/N-propyl ethylenediamine (silica/PSA) glass hybrid solid phase
extraction column was of 1.0 g/6mL (Hangzhou Fu yu technology service co., LTD).
Preparation of Imazethapyr MIPs Solid-Phase
Extraction Column. An empty polypropylene solid-phase
extraction column prepared for the experiment was blocked by a polyethylene sieve plate, and 500 mg of MIP powder was filled into the column, another polyethylene sieve plate was used to compact the MIP powder.
Other instruments included a MTN-2800D nitrogen concentrator (Tianjin Auto Science, China) and a HC-C18 solid phase
extraction column (CNW, Germany).
Next it is extracted in 70% methanol and then loaded onto a strong anion exchange, solid phase
extraction column. TFV-DP is isolated with salt gradients after which it is dephosphorylated.
Therefore, one of the approaches is the application of magnetic sorbents instead of filling the
extraction column with the sorbent.
Dust extraction ports were placed at regular intervals along the center of the spiral, either in the form of slots perforated directly in the central
extraction column or as suction channels under sections of the spiral with perforations.
In zone B, stratification planes occur in roof bedrock at a greater distance from developed bedrock, as compared to zone A, and is characterized by smaller size along the wall length, but greater size along the length of
extraction column. After full transfer of hanging "bedrock package" weight onto the seat earth, goaf bedrock is compacted, and separation occurs in the bedrock further away from the goaf roof (zone C).
The ultrasonic
extraction column includes the ultrasonic generation instrument and extraction reactor.
Larger ticks will increase the amount of fragmented exoskeleton in solution and this may obstruct the flow of the
extraction column, therefore, an additional 25-50 [micro]l of lysis buffer was added before homogenization.
The results suggest that paraffin-micro encapsulated red phosphorus particles show a lower moisture absorption ratio within the experimental conditions of the
extraction column and nozzle temperature of 120 [degrees] C,
extraction column pressure of more than 16 MPa, and a mass flow of core particles (0.5 g/min).
The major device used in this work is a bench scale pulsed plate liquid-liquid
extraction column whose characteristics are presented in Table 1.
In brief, the estrogenic chemicals were immobilized on a C18 silica-bonded solid-phase
extraction column, eluted, and analyzed by gas chromatography/mass spectrometry.