Schambeck SFD - Model S 6250/ S 6300 - HPLC-GPC Autosampler
From HPLC-GPC Autosampler
The S 6250 and S 6300 auto samplers are very flexible and powerful HPLC and GPC/SEC auto samplers with excellent reproducibility and linearity properties. Variable vial racks and adaptors for microtiter plates as well as a multitude of firmware options make this systems highly adaptable and suitable for any analytical application. Auto sampler S 6250 (60 samples) is in a small housing and the auto sampler S 6300 (120 samples) is in a slightly larger housing (see technical specifications).
The S 6250 and S 6300 auto samplers features a mechanically durable X / Y / Z - sampling-mechanic designed for long life operation. The self-lubricating bearings keep the routine maintenance at a minimum and avoid troubles caused by dusty environments. High precision stepper motors drive the X/Y axis for accurate positioning. Micro stepping mode enables a high resolution for the syringe dosing and vial positioning.
The dual-needle design of the S 6250 and S 6300 auto samplers avoids system blockages due to septum particles injected into the system. The ventilation needle pierces the septum before the injection needle moves into the sample vial (see figure on the right). As the more frag-ile injection needle does not need to pierce the vial septum, stronger vial caps or plastic vials can be used without problems.
The injection valve with sample loop and injection port can be accessed directly from the instrument front without removing any protective covers. The dosing syringe can be accessed from the side of the instrument through a hinged glass panel. The exchange of the syringe can be done without the requirement of any tools.
The S 6250 and S 6300 auto samplers offers multiple injection modes depending on application and sample needs. Besides fixed loop overfilling and variable volume injection the instrument offers a Zero-Waste injection mode for injecting very small sample amounts by moving the sample into the middle of the sample loop. Linearity and injection precision can be optimized for any volume by different sample loops and syringe sizes.
The modular nature of the S 6250 and S 6300 auto samplers offers the possibility to “just buy what you need”. Modular options include sample heating/cooling (only for auto sampler S 6300 in a range of approx. +4°C (RT-20°C) up to 60°C (RT = room temperature)) for any sensitive sample material and derivatization for automatized pre-column derivatization tasks from reagent derivatization to automatic sample dilution (available 4th quarter 2014).