Rayleigh Elementis QQ Series Inductively Coupled Plasma Mass Spectrometer (ICP-MS)

Overview

The Rayleigh Elementis QQ Series Inductively Coupled Plasma Mass Spectrometer (ICP-MS) is engineered for high-precision elemental and isotopic analysis in regulated and research-intensive laboratory environments. Leveraging robust inductively coupled plasma ionization—where sample aerosols are atomized, ionized at ~7,000 K in an argon plasma—and subsequent mass separation via a pure molybdenum quadrupole mass filter, the system delivers trace-level detection (sub-femtogram per liter), isotopic ratio reproducibility ≤0.05% RSD, and long-term signal stability (<2% RSD over 4 hours). Designed to meet the operational rigor of ISO/IEC 17025-accredited labs and support GLP/GMP-aligned workflows, the Elementis QQ integrates hardware-level interference mitigation, digital/analog dual-mode detection, and adaptive RF tuning—enabling reliable analysis of complex matrices without routine manual recalibration.

Key Features

• Modular torch assembly with self-aligning split-tube geometry—reducing alignment drift and enabling rapid maintenance without realignment tools.
• Thermoelectrically cooled (TEC) spray chamber operating at −5 °C—minimizing solvent vapor load, suppressing oxide/hydride interferences (e.g., ⁴⁰Ar¹⁶O⁺, ⁴⁰ArH⁺), and enhancing sensitivity for low-mass elements (e.g., Li, Be, Mg).
• On-line argon dilution module—permitting direct introduction of high-salinity samples (up to 25% w/v NaCl) without clogging or signal suppression.
• Self-excited all-solid-state RF generator (27.12 MHz) with frequency-matching auto-tuning—eliminating mechanical matching networks and delivering stable plasma ignition across organic solvents (e.g., methanol, kerosene) and aqueous matrices.
• Hybrid electric field collision/reaction cell—operable in kinetic energy discrimination (KED), collision cell (CRC), and multi-reaction (MR) modes—selectively removing polyatomic interferences (e.g., ⁴⁰Ar³⁵Cl⁺ on ⁷⁵As⁺) while preserving >70% ion transmission efficiency.
• Dual-mode electron multiplier detector—switching seamlessly between analog (for high-intensity signals) and digital pulse-counting (for ultra-trace detection), achieving a linear dynamic range spanning nine to ten orders of magnitude.

Sample Compatibility & Compliance

The Elementis QQ accommodates liquid samples introduced via concentric nebulizers (glass or PFA), laser ablation solids (with optional LA interface), and hydride-generation systems. It supports regulatory compliance frameworks including EPA Methods 200.8 and 6020B, ISO 17294-2, and ASTM D5673 for trace metal quantification. Data acquisition and audit trails conform to FDA 21 CFR Part 11 requirements when paired with validated software configurations. The instrument’s hardware architecture—including sealed RF compartments, inert flow paths (Ni, Pt, and quartz), and temperature-compensated quadrupole drive electronics—ensures consistent performance under standard laboratory conditions (20–25 °C, 40–60% RH) without environmental enclosures.

Software & Data Management

Control and data reduction are managed through Rayleigh ICP-MS Suite v3.x—a Windows-based platform supporting method development, real-time interference correction, isotope ratio calculation (with internal/external standardization), and automated QC reporting (e.g., calibration verification, drift correction, blank subtraction). Raw data files comply with ANDI/NetCDF format for third-party integration (e.g., ChemStation, MassHunter). Audit trail logs record user actions, parameter changes, and calibration events with timestamps and operator IDs—fully traceable for GLP audits and regulatory submissions.

Applications

• Environmental monitoring: Quantification of U, Th, Pb, As, Cd, Hg in groundwater, wastewater, soil digests, and airborne particulate filters.
• Food & tobacco safety: Screening for toxic elements (Pb, Cd, As, Ni) in infant formula, rice, leaf tobacco, and e-liquid aerosols per EU Commission Regulation (EU) No 2023/915.
• Petrochemical QA/QC: Catalyst residue analysis (V, Ni, Fe) in crude oil and refined fuels; sulfur speciation via reaction cell chemistry.
• Geochemical research: High-precision ⁸⁷Sr/⁸⁶Sr and ²⁰⁶Pb/²⁰⁴Pb isotope ratio measurements in silicate rocks and mineral separates.
• Clinical & pharmaceutical: Multi-element profiling in serum, whole blood, and urine for biomonitoring (e.g., Se, Zn, Cu, Co); residual catalyst metal testing in monoclonal antibody formulations.
• Forensics: Isotopic fingerprinting of lead bullets, illicit drug precursors, and heavy metal poisoning evidence.
• Semiconductor materials: Sub-ppt impurity screening (Na, K, Ca, Fe, Cr) in HF, HNO₃, and ultrapure water per SEMI F57 standards.
• Nuclear sector: Uranium enrichment assay (²³⁵U/²³⁸U), fission product monitoring (Cs, Sr, Ru), and environmental swipe sample analysis near fuel cycle facilities.

FAQ

Does the Elementis QQ Series support hyphenated techniques such as HPLC-ICP-MS?
Yes—the system features a dedicated micro-flow interface with low dead volume (<10 µL) and configurable dwell time synchronization for elemental speciation analysis.
Is the quadrupole mass analyzer temperature-stabilized?
The molybdenum rods are housed in a thermally insulated chamber with passive thermal mass design; RF voltage compensation algorithms further mitigate ambient humidity-induced frequency drift.
Can the collision/reaction cell operate with gases other than helium and hydrogen?
The cell supports He, H₂, NH₃, CH₄, and O₂—each selectable via software-controlled gas manifold with mass flow controllers calibrated to ±0.5% FS.
What level of automation is available for routine QC checks?
Built-in QC protocols include daily sensitivity checks (e.g., 1 ng/L Rh, In, Ce), oxide ratio monitoring (¹⁵⁶Gd¹⁶O⁺/¹⁵⁶Gd⁺), and background equivalent concentration (BEC) trending—with auto-flagging against user-defined acceptance criteria.
Is remote diagnostics supported?
Yes—via encrypted TLS 1.2 connection to Rayleigh’s Secure Remote Access Portal, enabling authorized service engineers to perform firmware updates, log review, and diagnostic scans without onsite visits.