Edible Oil Manufacturing Company (United States)
March 2025
Cooking Oil Testing
InquiryThrough our global network of testing experts and analytical equipment including chromatography (HPLC, GC, GC/MS) and atomic absorption spectroscopy (AAS, GFA, FIAS), Our goal is to provide test services as efficiently as possible to maximize our customers' profits. For more information about our services, contact one of our experts today.
Note: this service is for Research Use Only and Not intended for clinical use.
Cooking oil is plant, animal, or synthetic fat used for frying, baking, and other types of cooking. It is also used in preparation of foods and flavourings that do not involve heat, such as salad dressings and bread dips, and in this sense, it might be more accurately termed as edible oil. Cooking oils are typically liquid at room temperature, and some oils that contain saturated fat, such as coconut oil, palm oil and palm kernel oil, are solid. The common edible oils are mostly vegetable oils, including corn oil, rapeseed oil, peanut oil, sesame oil, olive oil, camellia oil, palm oil, canola oil, sunflower seed oil, soybean oil, linseed oil (spoma oil), grape seed oil, walnut oil, peony seed oil and other vegetable oils.
As a professional and comprehensive third-party testing organization, Alfa Chemistry Testing Lab provides one-stop testing, analysis and technical support services to clients around the world to ensure the quality and safety of cooking oils, and issues authoritative, scientific, fair and accurate testing reports for clients.
Samples that can be tested by Alfa Chemistry include:
- Animal-derived oils
Butter, sheep oil, lard, etc. - Vegetable oils
Corn oil, rapeseed oil, peanut oil, sesame oil, corn oil, olive oil, camellia oil, palm oil, canola oil, sunflower seed oil, soybean oil, sesame oil, linseed oil, grape seed oil, walnut oil, peony seed oil, etc.
Alfa Chemistry's testing services for edible oils include:
| Services | Testing Items |
|---|---|
| Nutrient content testing | Flavor quality, product quality grade, fatty acid methyl ester, determination of main components, iodine, trans fatty acids, fat, vitamin E, etc. |
| Mycotoxin testing | Aflatoxin B1, zearalenone, etc. |
| Heavy metal testing | Lead, total arsenic, cadmium, etc. |
| Environmental pollutant testing | Benzopyrene, dioxins, polychlorinated biphenyls, polycyclic aromatic hydrocarbons (PAHs), etc. |
| Food additive testing | Antioxidants, processing aids for the food industry, etc. |
| Physical and chemical analysis | Moisture, impurities, acid value, peroxide value, trans fatty acid, free fatty acid, physical index, chloropropanol ester, volatile phenol, etc. |
| Microbiological testing | Total number of colonies, coliforms, molds, pathogens, etc. |
| Veterinary drug residue testing | Tetracycline, etc. |
| Illegal additive testing | Plasticizer, etc. |
| Pesticide residue testing | Herbicide, organophosphate insecticide, dimethoate, fenthion, aldicarb, parathion, phorate, phoxim, malathion, dithiphos, hexachlorocyclohexane, pyrethroid, cypermethrin , deltamethrin, fenvalerate, methamidophos, etc. |
| Transgenic testing | Genetically modified screening, gene detection, strain identification, etc. |
Techniques for cooking oil testing
Gas Chromatograph (GC)
Purpose: Detect volatile compounds such as fatty acid methyl esters, solvent residues, and antioxidants.
High-Performance Liquid Chromatograph (HPLC)
Purpose: Detect non-volatile compounds such as vitamin E, sterols, and natural pigments.
Fourier Transform Infrared Spectrometer (FTIR)
Purpose: Analyze molecular structures and functional groups, and detect the content and oxidation state of unsaturated fatty acids.
Nuclear Magnetic Resonance Spectrometer (NMR)
Purpose: Determine the composition of fatty acids, particularly the ratio of saturated to unsaturated fatty acids.
Acid Value Tester
Purpose: Measure the content of free fatty acids, assessing the freshness and oxidation level of oils.
Peroxide Value Tester
Purpose: Detect peroxide content, evaluating the oxidation level and shelf life of oils.
Ultraviolet-Visible Spectrophotometer (UV-Vis)
Purpose: Detect pigments, antioxidants, and oxidation products, analyzing the purity and stability of oils.
Refractometer
Purpose: Measure refractive index, helping to identify types of oils and detect adulteration.
Conductivity Meter
Purpose: Measure the conductivity of oils, used to analyze moisture content or electrolyte contamination.
Heavy Metal Detector
Purpose: Detect heavy metal content in edible oils, such as lead, cadmium, and mercury, ensuring oil safety.
Automatic Titrator
Purpose: Automate acid-base titration analysis, commonly used for determining acid value, saponification value, and other indicators.
Moisture Meter
Purpose: Measure moisture content in oils, ensuring quality and shelf life.
Edible oils test guidance, standards and specifications
- USDA
- FDA
- ISO
Industry articlesFAQsCustomer Reviews
Determination of Free Steroidal Compounds in Vegetable Oils
Xu, Baocheng, et al. Food chemistry 245 (2018): 415-425.
Plant sterol profiles have been used for the characterization and identification of vegetable oils and are often employed as markers for detecting oil adulteration. Consequently, the study of plant sterols, particularly sterols in vegetable oils, has garnered interest among scientists.
A method was developed using comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry (GC×GC-TOF/MS) for the analysis of steroidal compounds in vegetable oils. This method offers better resolution and higher sensitivity compared to traditional one-dimensional gas chromatography, allowing for the determination of 31 types of sterols and triterpenols in a single injection. Additionally, the method enables the separation and detection of small amounts of other compounds (potentially unidentified steroidal compounds) that are masked in lower-resolution single-column techniques. The GC×GC system facilitates a more detailed and comprehensive assessment of the distribution and concentration of free sterols and triterpenols in safflower seed oil, soybean oil, canola oil, sunflower seed oil, and peanut oil.
Simultaneous Determination of Tocopherols, Carotenoids, and Plant Sterols in Edible Oils
Zhang, L., Wang, S., Yang, R., Mao, J., Jiang, J., Wang, X., ... & Li, P. (2019). Food Chemistry, 289, 313-319.
A method has been established fo sed on ultrasound-assisted saponification, liquid-liquid extraction, and liquid chromatography-tandem mass spectrometry (LC-MS/MS).
The sample treatment involved ultrasound-assisted saponification at a temperature of 75°C for 40 minutes. The limits of detection and quantification ranged from 2.0 to 3.2 ng/mL and 6.1 to 10.0 ng/mL, respectively. A linear correlation (R2 > 0.99) was achieved, with recovery rates at three spiking levels ranging from 81.7% to 112.0%.
Using this method, eight compounds were quantified in camellia oil and olive oil. The results indicated that the levels of stigmasterol, δ-tocopherol, γ-tocopherol, β-carotene, and lutein in camellia oil were significantly higher than those in olive oil (p < 0.05). This method can successfully be applied to the determination of these eight active components in camellia oil and other edible oils.
Determination of Ricinoleic Acid in Edible Oils
Cai, M., Chen, X., Wei, X., Pan, S., Zhao, Y., & Jin, M. (2014). Food chemistry, 158, 459-465.
A rapid and accurate method for the determination of ricinoleic acid in edible oils has been established using positive electrospray liquid chromatography-tandem mass spectrometry (LC-MS/MS).
Homogenized samples were extracted with ethanol/water (20:80, v/v), and 13C6-labeled ricinoleic acid was added as an internal standard. Purification was performed using dispersive solid-phase extraction (dSPE) with primary-secondary amine (PSA) and C18 as adsorbents. The extracts were separated using methanol/water (25:75, v/v) as the mobile phase on a short C18 reverse-phase column, and detection was carried out in multiple reaction monitoring (MRM) mode, with absolute matrix effects ranging from 93.2% to 102.2%.
Ricinoleic acid exhibited good linearity in the range of 0.5–50.0 μg/kg, with a limit of quantification of 0.5 μg/kg. Recovery rates ranged from 86.0% to 98.3%, and the intra-day and inter-day relative standard deviations (RSD) were 2.6% to 7.0% and 5.5% to 10.8%, respectively. This method is suitable for the rapid quantitative analysis of ricinoleic acid in edible oils.
Why is cooking oil testing important for food manufacturers and suppliers?
Cooking oil quality directly affects food safety, product consistency, and consumer acceptance. Regular testing helps companies verify oil quality during production, storage, and distribution, identify potential quality issues, and maintain compliance with food safety requirements.
For food manufacturers, restaurants, and oil suppliers, analytical verification provides reliable data to support quality control programs, supplier management, and product improvement.
How often should cooking oil be tested?
The testing frequency depends on factors such as production volume, storage conditions, processing methods, and quality management requirements.
Manufacturers may perform testing periodically as part of routine quality control, while companies handling large quantities of cooking oil may require more frequent evaluations to monitor quality changes and maintain consistent product performance.
Alfa Chemistry can help customers establish an appropriate testing schedule based on their specific quality objectives.
How does Alfa Chemistry ensure reliable cooking oil testing results?
Alfa Chemistry follows established laboratory procedures and quality control practices to ensure accurate and reproducible analytical results.
The laboratory applies appropriate calibration procedures, quality checks, and validated analytical methods throughout the testing process. Each report is reviewed to ensure data accuracy and clarity before being provided to customers.
Can Alfa Chemistry support quality control programs for food companies?
Yes. Alfa Chemistry works with food manufacturers, ingredient suppliers, and research organizations to support their quality assurance activities.
The testing results can help companies:
Testing solutions can be adjusted according to company-specific quality management requirements.
What information should customers provide before requesting cooking oil testing?
To develop a suitable testing plan, customers should provide basic project information, such as the purpose of testing, product background, quality concerns, and any specific requirements related to the evaluation.
Providing sufficient background information helps the laboratory recommend appropriate analytical approaches and deliver results that are more relevant to the customer's application.
⭐⭐⭐⭐⭐
"Alfa Chemistry assisted our quality control team with routine cooking oil analysis. Their reports were clear and easy to understand, and the technical team provided helpful guidance during the project. The results supported our internal quality verification process and improved confidence in our production control."
Service Used: Cooking Oil Quality Testing
⭐⭐⭐⭐⭐
"We selected Alfa Chemistry to support quality evaluation of our cooking oil products. The laboratory provided professional service, timely communication, and well-organized analytical reports. Their support helped our team better monitor product consistency during production."
Service Used: Cooking Oil Analysis & Quality Assessment
Food Processing Company (Canada)
November 2024
⭐⭐⭐⭐⭐
"Alfa Chemistry provided reliable testing support for our ingredient quality management program. The service process was efficient, and the final report contained the information needed for our internal review and customer documentation. We appreciated their professional approach and responsiveness."
Service Used: Cooking Oil Quality Control Testing
Food Ingredient Supplier (Germany)
August 2024
Downloads
White Paper
Flyer
Case Study
Fee Schedule
Latest updates
Do not know how to place an order, please refer to the flow chart shown below.
Submit quotation request |
A technical manager will contact you within 24 hours |
You will review and approve the final price and place an order |
Confirm with you and make the payment |
Instruct you to ship your samples and form |
Analytic report delivery |
Online Inquiry
X
KEEP UP TO DATE
Subscribe to our newsletter and follow us on social media
