Chromatographic detection analyzer for Shanghai Chuanqi trans fatty acids - Database & Sql Blog Articles

Trans fatty acids (TFA), also known as trans fats, are often referred to as "hidden dangers on the table." These harmful compounds primarily come from partially hydrogenated vegetable oils. These oils offer benefits such as high heat resistance, stability, and long shelf life, making them popular in various processed foods like cakes, cookies, frozen pizzas, French fries, and popcorn. However, excessive consumption of trans-fatty acids can raise blood cholesterol levels, increasing the risk of cardiovascular diseases. The testable components include: - N-hexane - Methyl tridecanoate - Methyl octadecanoate - Methyl anti-octadecenoate - Cis-methyl octadecanoate - Anti-octadecadienoic acid methyl ester - Methyl octadecadiate - Methyl eicosanoate - Cis-methyl eicosenoate These compounds are analyzed using gas chromatography, a powerful analytical technique that separates and identifies different chemical components in a sample. The GC-6890 gas chromatograph is an economical and reliable instrument designed for precise and efficient analysis. It features microcomputer control, a user-friendly Chinese menu display, and a highly integrated electronic system. Its ease of use, memory settings, and long-term stability make it ideal for continuous operation without frequent recalibration. This instrument is equipped with a large oven and a powerful cooling system that allows near-room temperature operation. It supports various column types, including capillary, glass, and stainless steel columns, and offers both constant temperature and temperature-programmed operation modes. Key features of the GC-6890 include: - **Large-screen LCD Chinese display**: Easy to operate and learn, suitable for users of all experience levels. - **Self-diagnosis and over-temperature power-off protection**: Ensures safe and stable operation during analysis. - **Six independent temperature control zones**: Enables precise control of multiple sections of the instrument. - **Intelligent door opening system**: Provides rapid cooling, improving efficiency. - **Separate capillary analysis system**: Includes a split injector with diaphragm cleaning, splitting, and makeup adjustment options. - **Multiple detector options**: Equipped with a hydrogen flame detector (FID), thermal conductivity detector (TCD), and flame photometric detector (FPD). Users can choose based on their specific needs and even add accessories like a six-way valve or reformer device. Technical specifications include: - **Temperature control range**: - Oven: 6°C to 399°C (accuracy ±0.1°C) - Injector and detector: 6°C to 399°C (accuracy ±0.1°C) - **Temperature programming**: Up to fifth-order program with variable heating rates: - 0.1°C/min to 40°C/min for temperatures up to 200°C - 0.1°C/min to 20°C/min for temperatures above 200°C **Detector performance**: - **Hydrogen Flame Detector (FID)**: - Sensitivity: ≤1×10⁻¹¹ g/s (n-hexadecane) - Noise: ≤5×10⁻¹⁴ A - Linear range: ≥10⁶ - **Thermal Conductivity Detector (TCD)**: - Sensitivity: ≥5000 mv·ml/mg (hexadecane) - Noise: ≤20 uv - Linear range: ≥10⁴ - **Flame Photometric Detector (FPD)**: - Sensitivity for sulfur: 1×10⁻¹¹ g(S)/s (in thiophene) - Sensitivity for phosphorus: 1.4×10⁻¹² g(P)/s (in methyl parathion) This advanced gas chromatograph is ideal for laboratories requiring accurate and consistent results in food safety, environmental monitoring, and chemical analysis.

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