Dispensette® S TA Trace Analysis Bottle Top Dispenser

Overview

The Dispensette® S TA Trace Analysis Bottle Top Dispenser is an engineered solution for ultra-low-contamination liquid handling in trace elemental analysis laboratories. Designed specifically for applications demanding sub-ppb metal contamination control—such as ICP-MS, GF-AAS, and high-purity standard preparation—the device operates on a positive-displacement principle with a fully isolated fluid path. Unlike air-displacement pipettes, its piston-driven mechanism eliminates aerosol formation and cross-sample carryover. All wetted components—including the dispensing valve, piston seal, suction tube, and outlet nozzle—are fabricated from ultra-high-purity fluoropolymers (PFA, PTFE, FEP, ETFE, PCTFE) and single-crystal sapphire, ensuring minimal leaching of trace metals—even during prolonged contact with aggressive reagents such as hydrofluoric acid (HF), concentrated nitric acid, hydrogen peroxide, and sodium hydroxide.

Key Features

• Trace-metal-clean fluid path certified to meet ISO/IEC 17025-compliant validation protocols for trace analysis workflows
• Interchangeable valve modules with either platinum-iridium or tantalum coil springs—both corrosion-resistant and non-magnetic, critical for HF and high-oxidizing environments
• 360° rotatable valve head enabling ergonomic alignment with bottle labeling for unambiguous reagent identification and operator safety
• Adjustable suction tube length accommodating standard 45 mm GL45-threaded bottles and compatible with included adapter sleeves for common lab bottle formats (e.g., GL32, GL25)
• Modular piston cylinder assembly designed for rapid field replacement without tools—reducing downtime during routine maintenance or calibration intervals
• DE-M marked per German Measurement Act (Eichgesetz), indicating conformity with metrological requirements for volumetric accuracy and repeatability under DIN EN ISO 8655-3

Sample Compatibility & Compliance

The Dispensette® S TA is validated for use with high-purity acids (≥69% HNO₃, ≥48% HF, ≥30% H₂O₂), bases (e.g., 1 M NaOH), and organic solvents commonly employed in digestion and dilution protocols. Its sapphire valve seat and fluoropolymer seals withstand repeated exposure without degradation, maintaining volumetric accuracy across >10,000 dispense cycles. The absence of internal check valves (non-return design) prevents backflow-induced contamination—a requirement specified in ASTM D5127 for ultratrace metal analysis and aligned with EPA Method 200.8 recommendations. Each unit ships with a Certificate of Conformance detailing material certifications (e.g., ASTM D4894 for PFA purity, ISO 15203 for sapphire hardness) and batch-specific trace metal assay data (Al, Cr, Fe, Ni, Cu, Zn, Pb, Cd, As, U ≤ 10 pg/mL).

Software & Data Management

As a manually operated, non-electronic dispensing system, the Dispensette® S TA does not incorporate embedded firmware or digital connectivity. However, it supports full integration into GLP/GMP-compliant documentation frameworks: calibration records, usage logs, and cleaning verification reports can be maintained using laboratory information management systems (LIMS) or electronic lab notebooks (ELN). The included operation manual provides validated cleaning procedures—including sequential rinses with high-purity water, 2% HNO₃, and methanol—verified by ICP-MS post-cleaning blank testing. All cleaning steps are traceable and auditable per FDA 21 CFR Part 11 when executed within a controlled electronic record environment.

Applications

• Preparation of calibration standards and QC samples for ICP-OES, ICP-MS, and HG-AFS at ppt-level detection limits
• Acid digestion of environmental, biological, and semiconductor-grade samples in cleanroom-class laboratories (ISO Class 5 or better)
• Dispensing of high-purity solvents in photovoltaic wafer etching and lithium-ion battery electrolyte formulation
• Controlled delivery of oxidizing agents (e.g., H₂O₂, persulfates) in redox titration and catalyst synthesis where metal catalysis must be excluded
• Standard addition workflows requiring repeatable, low-volume transfers (1–10 mL) without memory effects

FAQ

Is the Dispensette® S TA suitable for hydrofluoric acid (HF)?

Yes—when equipped with the platinum-iridium spring variant and sapphire/PFA fluid path, it is validated for continuous use with ≥48% aqueous HF at ambient temperatures.
What cleaning protocol is recommended between different high-purity standards?

Follow the manufacturer’s validated 3-rinse sequence: ultrapure water → 2% v/v trace-metal-grade HNO₃ → methanol—each performed ≥5× full-volume cycles, followed by blank analysis via ICP-MS.
Can this dispenser be calibrated and certified for ISO/IEC 17025 accreditation?

Yes—third-party metrology labs accredited to ISO/IEC 17025 can perform volumetric calibration per DIN EN ISO 8655-3, issuing traceable certificates with uncertainty budgets.
Does it support GL45 bottle threads only?

It ships with a GL45 interface and includes interchangeable adapters for GL32 and GL25 bottles, enabling compatibility with major reagent container suppliers (e.g., Fisher, VWR, Sigma-Aldrich).
How is traceability ensured for regulatory audits?

Each unit bears a unique serial number; material certificates, cleaning logs, calibration reports, and usage records are retained per ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for FDA, EMA, or ISO 17025 inspections.