Overview of solid phase extraction instrument: As a sample preparation technology, solid phase extraction has been more and more widely used in the laboratory. It utilizes the poor ability of the analyte to be adsorbed in different media to purify the target substance, effectively separating the target substance from the interfering components, greatly enhancing the ability to detect analytes, especially trace analytes, and improving the sample to be tested Recovery rate. Such products are widely used in many fields such as pesticide detection, food analysis, medicine, and commodity inspection.
The principle and application of solid phase extraction instrument: The solid phase extraction device uses a solid adsorbent to adsorb the target compound in the liquid sample, separate it from the sample matrix and interfering compounds, and then elute with the eluent or heat desorption to achieve separation And the purpose of enriching the target compounds (ie sample separation, purification and enrichment), the purpose is to reduce sample matrix interference and improve detection sensitivity, which is used in various food safety tests, agricultural product residue monitoring, medicine and health, environmental protection, commodities Inspection, tap water and chemical production laboratories.
Main features of solid phase extraction instrument:
1. The whole machine is made of transparent plexiglass and has strong corrosion resistance.
2. Each channel is equipped with an inlet regulating valve, which can adjust the flow rate according to the test requirements. Good sealing and high consistency;
3. The operation is simple, fast and easy to realize automation;
4. Anti-cross pollution and anti-atomization vacuum tank design;
5. The solid phase extraction instrument is evenly pressurized everywhere, with good air tightness and strong stability.
6. The internal test tube rack of the product is made of PTFE, so it has high corrosion resistance.
7. The vacuum tank has uniform wall thickness, so it can withstand high negative pressure above -0.096Mpa.
Technical characteristics of solid phase extraction instrument:
1. Accurate speed control, single channel flow rate 0.01-7ml / min, support large volume injection and positive pressure elution, avoid cross contamination;
2. Corrosion-resistant top plate, chassis phosphating and multi-layer epoxy resin spraying treatment;
3. The chassis structure is convenient for maintenance;
4. Multi-channel, small column joints are resistant to acid, alkali, organic solvents, oxidants;
5. The operation is simple, and single-person operation can process 1-8 samples at the same time, greatly improving work efficiency;
6. Consistent extraction speed and easy control adjustment;
7. Good sealing, strong stability, good linear relationship between speed and flow rate.
Solid phase extraction device: http: //
Wall lamps refer to auxiliary lighting decorative lamps installed on indoor walls, mostly equipped with milky white glass lampshades. The light of the wall lamp is elegant and harmonious, which can put the ring
The environment is decorated with elegance and richness. There are many types and styles of wall lamps, common ceiling lamps, color-changing wall lamps, bedside wall lamps, mirror wall lamps, etc. 2, if the surrounding is narrow, optional
Thin wall light. The power of the wall light source should be consistent with the purpose of use. The installation height of the wall lamp should be slightly higher than the human head.
1. Pay attention to the quality of the lampshade. When buying a wall lamp, first look at the quality of the lamp itself. The lampshade is usually made of glass, while the bracket is usually metal
made. The lampshade mainly depends on whether its light transmittance is suitable, and the pattern and color of the surface should echo the overall style of the room. Whether the corrosion resistance of the metal is good
Well, whether the color and gloss are bright and full are important indicators to check the quality.
2. Light brightness. - - Generally speaking, soft light is better, and the degree should be less than 60 watts. In addition, different types of wall lamps should be selected according to the needs of installation, such as: .
If the room is small, use a single-head wall lamp, if the room is large, use a double-head wall lamp, if the space is large, you can choose a thicker wall lamp; otherwise, choose a thinner one. Last note
It is best to choose a wall lamp with a protective cover for the bulb, which can prevent the wallpaper from igniting and cause danger.
3. Style specifications. The style and specifications of wall lamps should be coordinated with the installation site. For example, double-fire wall lamps can be installed in large rooms, and single-fire wall lamps can be installed in small rooms. The thickness of the wall lamp
Coordinate with the installation site environment. If the surrounding area is large, thick wall lamps can be selected; if the surrounding areas are narrow, thin wall lamps can be selected.
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