Laboratory analytical instrument procurement, second-hand headspace sampler supply.

Nikon Scientific Instruments is based in the scenic city of Nanjing, leveraging its convenient and well-connected transportation network to provide analytical testing users across various provinces and cities in China—including universities, R&D enterprises, pharmaceutical companies, and others in fields such as medicine, chemicals, food, environment, life sciences, and third-party testing—with high-precision analytical instruments and related services. These include high-quality new/refurbished liquid chromatography, gas chromatography, LC-MS, GC-MS systems, and consumables, accessories, maintenance, repair, certification, leasing, and relocation services for international brands such as Agilent, Waters, Thermo, Shimadzu, and AB Sciex.

We also supply imported/domestic laboratory instruments and equipment, such as ion chromatographs, atomic absorption spectrometers, UV spectrophotometers, infrared spectrometers, moisture titrators, polarimeters, electronic balances, stability test chambers, and related products.

Headspace Sampler

The headspace sampler is a convenient and efficient sample handling method in gas chromatography. Its principle involves placing the sample to be tested into a sealed container, heating it to allow volatile components to evaporate from the sample matrix, reaching equilibrium between the gas and liquid (or gas and solid) phases. The top gas is then directly extracted for chromatographic analysis to determine the composition and content of volatile components in the sample. Using headspace sampling technology eliminates lengthy and cumbersome sample preparation processes, avoids interference from organic solvents in analysis, and reduces contamination of the chromatographic column and injection port. This instrument can be connected to various models of gas chromatographs, both domestic and international.

Advantages

Compared to other gas chromatography sample handling techniques, the headspace sampler eliminates complex and error-prone steps, allowing you to obtain a wealth of useful information in a shorter time.

Classification and Features

Currently, headspace analysis methods include manual injection, gas-tight syringe injection, balanced-pressure system, pressure-loop system, and static-dynamic compensation system. Below are the characteristics of each injection method.

I. Manual Injection (Oven or Water Bath Method)

1. Sample is heated to reach thermal equilibrium.

2. Sample is extracted using a syringe.

3. Quickly transferred to the gas chromatograph for injection and analysis.

II. Gas-Tight Syringe Injection

1. Sample is heated to reach thermal equilibrium.

2. Sample is extracted using a heated gas-tight syringe.

3. Moved to the gas chromatograph for injection and analysis.

III. Balanced-Pressure System

1. Sample is heated to reach thermal equilibrium.

2. Carrier gas is introduced through a conduit to pressurize the system.

3. Sample is introduced along with the carrier gas for analysis.

IV. Pressure-Loop System

1. Sample is heated to reach thermal equilibrium.

2. Pressure is applied to introduce the sample into the sample loop.

3. A valve directs the sample into the transfer channel for injection.

V. Static-Dynamic Compensation System—AutoHS Headspace Sampler

1. Utilizes advanced technology to provide more options for sample extraction.

1.2. Purge Mode

1.3. Constant Mode

1.4. Multiple Headspace Mode

1.5. Temperature Ramp Mode

Nikon Scientific Instruments Co., Ltd. provides equipment and instrument maintenance and repair services, including Agilent instrument refurbishment. Whether you need information on maintenance principles, parameters, pricing, or models, feel free to consult us. Contact us for pre-sales and after-sales support.