Extraction Funnel
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Extraction Funnel

1.Triangular Funnel: 60mm/75mm/90mm/120mm/150mm
2.Big mouth Funnel:90mm/170mm/210mm/260mm
3.Wide-mouthed funnel: 150mm/200mm/250mm/300mm
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Description

Technical Parameters

The Extraction Funnel, also known as a separating funnel, is a vital piece of laboratory equipment primarily used in the process of liquid-liquid extraction. It facilitates the separation of two immiscible (non-mixing) liquids based on their different densities and solubility characteristics. Typically made of glass or plastic for durability and chemical resistance, this funnel-shaped container is designed with a narrow neck to minimize evaporation and enhance the separation process.

Moreover, its design ensures minimal contamination and waste, contributing to both the accuracy of experimental results and sustainability in laboratory practices. With its simple yet effective mechanism, it stands as a cornerstone of modern chemical extraction techniques.

The funnel is one of the indispensable instruments in chemical experiments and plays an important role in the separation, extraction or purification of liquid mixtures. It is of great significance for improving the efficiency and ensuring the safety of the experiment to master the correct use method and precautions.

 

Specifications

 

20241028113854

 

 
Triangular Funnel
 

 

Triangular Funnel Specifications | Shaanxi Achieve chem-tech

 

20241028113938

 

 
Big Mouth Funnel
 

 

Big Mouth Funnel Specifications | Shaanxi Achieve chem-tech

 

20241028114025

 

 
Wide-mouthed Funnel
 

 

Wide-mouthed Funnel Specifications | Shaanxi Achieve chem-tech

 

Matters needing attention

Select the appropriate extraction solvent: the extraction solvent should have a large solubility of the extract, and is not miscible or slightly soluble with the original solvent. At the same time, the extraction solvent should have a low boiling point, which is easy to recover by distillation and other methods after extraction.

Extraction Funnel | Shaanxi Achieve chem-tech

Avoid emulsification

Emulsification may occur during extraction due to violent oscillations or improper selection of solvents. At this time, the emulsification layer can be destroyed by standing, adding electrolyte, heating or dropping a small amount of alcohol.

Extraction Funnel | Shaanxi Achieve chem-tech

Safe operation

When using the separator funnel, care should be taken to avoid liquid leakage and spatter. Especially when dealing with flammable, explosive or toxic solvents, it should be operated in the fume hood and strictly comply with laboratory safety specifications.

Extraction Funnel | Shaanxi Achieve chem-tech

Maintenance

After the end of the experiment, the funnel should be cleaned and dried in time. When not used for a long time, a strip of paper should be sandwiched between the piston and the funnel to prevent adhesion.

Applications
In the food industry

In the food industry, extraction funnels are primarily utilized for the separation of impurities or the extraction of specific components from food materials. These devices can come in various forms, such as filter funnels, separating funnels, or even specialized extraction equipment tailored for specific food processing needs.

1. Impurity Removal
  • In the production of beverages, oils, and other liquid foods, they can be used to remove solid impurities like dust, dirt, or unwanted particles.
  • They ensure the clarity and purity of the final product by filtering out contaminants that could affect taste, appearance, or safety.
2. Component Extraction
  • They may also be employed in processes where specific components need to be isolated from a mixture. For example, in the extraction of natural flavors or essences from plant materials, a specialized funnel setup can facilitate the separation and collection of these valuable components.
  • In some cases, solvent extraction methods using them are utilized, where a solvent is used to dissolve and separate the desired compound from the mixture.
3. Sample Preparation for Analysis
  • In food safety and quality control, they are often used for the preparation of samples for analytical testing. This involves filtering or extracting specific components from a larger sample to facilitate accurate analysis.
  • For instance, in the detection of pesticide residues or microbial contamination, samples may be processed through them to isolate and concentrate the target analytes for subsequent analysis.

Extraction Funnel Applications | Shaanxi Achieve chem-tech

Extraction Funnel Applications | Shaanxi Achieve chem-tech

 

About Pesticide Residue Testing

 

Pesticide residue testing is a crucial process in ensuring the safety of food and agricultural products for human consumption. It involves the detection and quantification of trace amounts of pesticides that may remain on or within crops after application. These residues can pose potential health risks if not adequately monitored and regulated.

 

The testing process typically begins with sample collection, where fruits, vegetables, grains, or other agricultural commodities are randomly selected to represent the batch. Samples are then prepared through various techniques such as washing, homogenization, and extraction to isolate the pesticide residues.

 

Modern analytical methods, including chromatography (e.g., gas chromatography and liquid chromatography) coupled with mass spectrometry, are widely used due to their high sensitivity and specificity in identifying and quantifying pesticides. These techniques allow for the detection of even minute concentrations of pesticides, often in the parts-per-million or parts-per-billion range.

 

Once analyzed, the results are compared against regulatory limits set by governments and international organizations to determine compliance. If residues exceed these limits, the products may be subject to further investigation, withholding from market, or destruction.

 

Pesticide residue testing is not only essential for protecting public health but also promotes sustainable agriculture by encouraging the responsible use of pesticides. Continuous advancements in analytical technology and regulatory frameworks are enhancing the accuracy, efficiency, and global harmonization of this vital safety practice.

 

Extraction Funnel Applications | Shaanxi Achieve chem-tech Extraction Funnel Applications | Shaanxi Achieve chem-tech

 

About Microbiological Contamination Testing

 

Food microbiological contamination testing is a crucial process in ensuring the safety and quality of food products. It involves the detection and identification of microorganisms, such as bacteria, viruses, molds, and yeasts, that may be present in food and could pose a risk to consumers' health.

 

The testing process typically begins with the collection of food samples, which are then prepared and processed under controlled conditions to prevent contamination. Various techniques are employed to detect these microorganisms, including culture-based methods, which involve incubating samples in specific media to promote the growth of target microorganisms, and molecular methods, such as PCR (polymerase chain reaction), which can detect the presence of microbial DNA or RNA.

 

In addition to detecting the presence of microorganisms, testing also aims to determine their levels or concentrations, as well as their potential to cause illness. This information is crucial for assessing the safety of food and for implementing appropriate control measures to reduce or eliminate contamination.

 

Overall, food microbiological contamination testing plays a vital role in protecting public health and maintaining consumer trust in the food industry. By ensuring that food products are free from harmful microorganisms, this testing helps to prevent foodborne illnesses and promote the overall safety and quality of food.

 

Method of preventing adhesion during extraction

Material and selection of funnel and piston

 

 

First of all, the material choice of funnel and piston is very important. Typically, extraction funnels and pistons are made of glass or plastic. Glass funnel is widely used because of its good chemical stability, high temperature resistance, not easy to deformation and so on. However, the glass funnel also has the disadvantages of being fragile and heavy. Plastic funnels are relatively light and durable, but some plastic materials may react chemically to certain solvents, so full compatibility testing is required before use.

When selecting the funnel and piston, it should be ensured that their sizes match and their sealing performance is good. The sealing performance of the piston is the key to prevent leakage and adhesion. If the gap between the piston and the funnel is too large, it may lead to leakage; If the gap is too small, it may cause adhesion due to excessive friction. Therefore, when selecting, the sealing performance of the piston and the matching degree with the funnel should be carefully checked.

The use and precautions of grease

 

 

In order to prevent the adhesion of the funnel and the piston, applying an appropriate amount of grease is an effective method. Greases should be selected based on their chemical stability, lubrication properties and compatibility with extracts. Common greases include petroleum jelly and glycerin.

Petroleum jelly: Petroleum jelly is a commonly used lubricant and sealant with good adhesion and lubrication properties. After the application of petroleum jelly, a lubricated and tight film can be formed between the piston and the funnel, which effectively reduces the occurrence of leakage and adhesion. However, it should be noted that the application should be uniform and not excessive, so as not to block the flow hole or affect the separation effect.

Glycerin: Glycerin also has lubricating and sealing effects, and its chemical properties are stable, and will not interfere with the experiment. After applying glycerin, a protective film can be formed on the surface of the piston to improve the sealing performance of the piston. Compared with petroleum jelly, glycerin may be more suitable for experiments that require higher requirements for greases.

 

When applying grease, the following points should also be noted:

 Before applying, ensure that the surface of the funnel and piston is clean and free of impurities.

 Apply evenly to avoid uneven local application.

 The amount of application should be moderate, neither too much nor too little. Too much will cause the piston to slide poorly, and too little will not achieve the desired lubrication and sealing effect.

Precautions in the operation process

In the extraction process, the correct operation method is also the key to prevent the funnel and the piston from sticking. Here are some operational details to be aware of:

Extraction Funnel | Shaanxi Achieve chem-tech
Extraction Funnel | Shaanxi Achieve chem-tech
Extraction Funnel | Shaanxi Achieve chem-tech
Extraction Funnel | Shaanxi Achieve chem-tech

Check tightness: Before use, check the sealing performance of the funnel and piston. It can be judged whether the sealing performance is good by injecting water into the funnel and observing whether there is leakage. If leakage is found, it should be handled in time, such as reapplying grease or replacing seals.

Control of shaking strength: During the extraction process, the funnel needs to be shaken to make full contact between the solution and the solvent. However, the shaking force should not be too large, so as not to cause excessive pressure to leak or increase the friction between the piston and the funnel, resulting in adhesion. Therefore, when shaking, the strength should be controlled and the gas should be deflated in time to reduce the internal pressure.

Static stratification: After shaking, the funnel should be left standing for a period of time to fully stratify the solution and solvent. During the resting process, avoid moving the funnel or interfering with its layering process. After delamination, the correct solution discharge method should be selected according to the relationship between the specific gravity of the extractant and the specific gravity of the extracted liquid.

Timely cleaning and drying: After the extraction is completed, the funnel and piston should be cleaned in time to remove residual solvents and impurities. After cleaning, dry it thoroughly and store it properly to avoid adhesion. When stored, a strip of paper can be placed between the piston and the funnel or other methods can be used to prevent adhesion.

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