Pretreatment of complex samples has always been the focus of analytical chemistry research. The efficient, rapid, parallel, environment-friendly and miniaturized sample pretreatment technology has become an important research field in modern analytical chemistry. Hollow fiber tube micro-extraction technology (HFME) integrates sampling, extraction, and concentration. It has a small amount of organic solvent, is environment-friendly, has a low cost, and is simple to install. It is easy to use with modern chromatographic analyzers such as HPLC and GC. Widely used in food safety, drug evaluation, environmental monitoring and other livelihood areas. Under the support of the National Natural Science Foundation of China, the team led by Shi Yanping, a researcher at the Northwest Key Laboratory of Plant Resources Chemistry of the Chinese Academy of Sciences Lanzhou Institute of Chemical Physics, has carried out Hollow Fiber Microextraction technology combined with chromatographic analysis since 2008. Based on systematic research, a variety of hollow fiber micro-extraction technologies have been developed and applied to the monitoring of contaminants and pesticide residues in foods and pharmaceuticals, and the monitoring of environmental pollutants. First, by exploiting the advantages of porous hollow fibers, the development of hollow fiber liquid phase micro-extraction (HF-LPME) using porous polypropylene hollow fiber (PPHF) [Acta Chromatographica, 2010, 22 : 307; Biomedical Chromatography, 2010, 24: 1350; Journal of Chromatography B, 2010, 878: 2811]. Second, they overcome the shortcomings of hollow fiber liquid phase microextraction and use porous polypropylene hollow fiber as a template to prepare and establish hollow metal oxides hollow fiber sorptive micro-extraction (HF-SME). ), and combined with gas chromatography (GC-MS) analysis of trace pesticide residues in illicit additives melamine, fresh grapes and rhubarb in dairy products and organic pollutants in environmental water samples [Journal of Chromatography A, 2009 , 1216: 5467; Analytica Chimica Acta, 2009, 651: 182; Analytical and Bioanalytical Chemistry, 2010, 398: 1501; Food Chemistry, 2011, 127: 784]. Third, the advantages of carbon nanotubes strong adsorption (CNTs) and hollow fiber pore sieve filtration were fully exploited. With the porous polypropylene hollow fiber as the matrix, carbon nanotubes reinforced hollow fiber micro-extraction technology was developed and established. The solid phase micro-extraction (CNTs-HF-SPME) and the combination of high-performance liquid chromatography (HPLC) have been applied to the analysis of non-steroidal estrogens in milk and the residual non-stilbestrol in water samples. Anti-inflammatory drugs piroxicam and diclofenac sodium, broad-spectrum insecticide carbamate commonly used in apples, naphthalene acetic acid and naphthalene acetic acid as plant hormones in tomato, strychnine and strychnine, toxic alkaloids in Chinese urine [Talanta, 2012, 97: 222; Talanta, 2012, 100: 153; Talanta, 2013, 116: 188; Food Chemistry, 2013, 139: 246; Journal of Chromatography A, 2014, 1374: 23]. Fourth, taking full advantage of the advantages of ionic liquids and electrical membrane extraction, ionic liquid based electromembrane extraction (IL-EME) using hollow fibers as the support liquid membrane, combined with HPLC to efficiently detect urine in traditional Chinese medicine The toxic ingredients brucine and strychnine, pesticide residues in livestock tissues, etc. [Journal of Chromatography A, 2014, 1352: 1; RSC Advance, 2015, 5:37682]. Based on years of research on hollow fiber microextraction technology, the research group systematically reviewed the "Research Progress of Sample Preparation Technology for Hollow Fiber Tubes Modified by Various Adsorbents Functionally Modified" and published in the recently published TrAC magazine [Trends]. In Analytical Chemistry, 2015, 64: 109]. The above advanced analysis methods and detection technologies provide a scientific basis for food safety, drug evaluation, and environmental monitoring in China, and are conducive to promoting the improvement of China's food and drug safety and environmental protection levels.
Product Features
1. Good physical and mechanic performance.
2. High tearing resistance, strong deformation adptability.
Product Application
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Q : Are you a factory or trading company? Geotextile Fabric,Hdpe Geomembranes,Pp Pet Geotextile,Geosynthetic Clay Liner Shandong Jinruixiang Geotextile Material Co., Ltd , https://www.jrxgeosynthetics.com
3. Corrosion resistance, aging resistance.
4. Good adaptability to high and low temperature, non-toxicity, long service life.
5. Good waterproof, drainage, anti-seepage and damp proof effects.
6. Complete width and thickness specifications, low cost and easy installation.
Construction Method
2. Tow adjacent longitudinal joints should not be in a horizontal line, should bestaggered more than 1m each other.
3. Longitudinal joints should be more than 1.50m away from the dam foot and bending foot, and should be located on the plane.
4. When the slope is laid, the direction of spreading film should be basically parallel to the slope line.
5. The construction, first of all to use small diameter sand or clay levelingbase, and then laid the geomembrane. The geomembrane should not be stretched too tight, and the part of the soil bured at both ends is corrugated. A transitional layer of about 10cm is laid on the geomembrane with sand or clay.
Company Information
Customer Feedback
A : We are a professional manufacturer that specialized in geomembrane, geotextile, Composite Geomembrane etc with ISO9001 certificate more than 15 years.
Q : Where is your factory located? How can I visit there?
A : Our facoty is located is No.10 Yuanshan Road High-tech Development Zone, Laiwu District, Jinan City China. You can take the plan to Jinan Yaoqiang International Airport, then we can pick you up.
Q : Could you send the sample before order confirmation?
A : Yes, we'd love to send a free sample to you for an evaluation if you need.
Q : How about the delivery time?
A : General within 3-7 days after received the deposit.
Q : Can you produce the product according to customers' requirements?
A : Sure, we are professional manufacturer, OEM and ODM are both welcome.
Hollow fiber micro-extraction technology and chromatographic analysis methods have achieved series progress
HDPE Geomembrane is produced according to the GRI GM13 standard.
It`s made of high quality polyethylene resin with proportional carbon black antioxidant, anti-aging and UV- resistance materials which exhibit impermeable and ultraviolet resistance properties. Compared with traditional concrete and compacted clay, smooth geomembranes have proven to be more cost effective, safe and fast deployment. They are widely used for solid waste landfills, waste containment, aquaculture and water treatment system, etc.
Product name
HDPE geomembrane fish farm shrimp pond dam landfill mine tailing liner
Usage
Waterproof and seepage control project
Color
Black/white/blue/double color
Material
HDPE/LDPE/LLDPE/EVA
Thickness
0.1mm-3.0m 1m-8m in roll width, the length as client's request
Service valid term
More than 10 years!
Payment term
L/C D/A D/P T/T Western Union Money Gram
Packing detail
Packing in woven bags. Keep it away from fire.
Property
Good flexible ,UV treated,Excellent environmental stress cracking resistance property,Low temperature resistance, corrosion resistance, aging resistance.
Specific Use
Municioal environmental project, water conservancy projects,Landfill cap, mining heap leach pads, pond liner, canal linings, tank, linings, raw water treatment reservoirs, retention ponds,Waste water treatment lagoon, secondary containment.
Aquaculture Industry
For example, industrialized aquaculture ponds, fish ponds, shrimp pons lining, sea cucumber circle protection, etc.
Environmental Protection
Water Conservancy
Municipal Engineering
For example, tunnel, subway, underground works of buildings and roof cisterns, impervious roof garden, lining of sewage pipes, etc.