ICP Torch Tube by SGM

Overview

The SGM ICP Torch Tube is a precision-engineered consumable component designed for inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS) systems. Constructed from ultra-high-purity fused quartz (≥99.99% SiO₂), the torch tube withstands sustained plasma temperatures exceeding 6,000–10,000 K while maintaining dimensional stability and optical clarity. Its triple-concentric design—comprising inner, intermediate, and outer capillaries—enables stable plasma ignition, efficient aerosol transport, and precise control of argon gas laminar flow dynamics. The geometry is optimized to minimize plasma flicker, reduce carbon deposition, and support consistent nebulization efficiency across extended operational cycles. Unlike generic quartz tubes, the SGM ICP Torch Tube undergoes rigorous annealing and vacuum-degassing prior to final inspection, ensuring low metallic impurity background and minimal spectral interference in trace-element analysis.

Key Features

• High-purity fused quartz construction with certified trace-metal content ≤10 pg/g for Al, Fe, Na, K, and Ca
• Dimensionally stabilized after controlled thermal cycling (25 °C → 800 °C × 5 cycles) to prevent warping during routine plasma operation
• Precision-ground concentricity tolerance: ±0.02 mm between inner/intermediate/outer tubes, critical for plasma stability and signal reproducibility
• Optimized inner capillary bore (2.0 mm ID) compatible with standard PFA, quartz, and sapphire nebulizers delivering 0.1 mL/min uptake rate
• Intermediate tube (12.0 mm ID) engineered for optimal auxiliary gas flow (typically 0.5–1.5 L/min Ar), minimizing radial plasma displacement
• Outer tube (22.0 mm OD) with uniform 1.0–1.2 mm wall thickness ensures mechanical rigidity and resistance to thermal stress fracture

Sample Compatibility & Compliance

The SGM ICP Torch Tube is validated for use with aqueous, organic (e.g., methanol, ethanol-diluted), and high-salt matrix samples (up to 25% w/v NaCl) when paired with appropriate sample introduction systems. It complies with ISO 17025 requirements for certified reference material (CRM) analysis and supports method validation per ASTM D1976, EPA Method 200.7, and USP <232>/<233>. Torch geometry meets OEM specifications for major ICP platforms including PerkinElmer Optima series, Thermo iCAP RQ/RAD, Agilent 5110/5900, and Shimadzu ICPE-9800. All units are supplied with individual Certificate of Conformance listing batch-specific purity assay, dimensional verification report, and thermal history log.

Software & Data Management

While the torch tube itself is a passive hardware component, its performance directly impacts instrument software-driven diagnostics. When integrated into ICP systems with vendor-supplied control software (e.g., WinLab32, Qtegra, or ICP Expert), the SGM torch enables stable baseline drift (<0.5% RSD over 4 h), facilitating automated plasma optimization routines and real-time RF impedance monitoring. Torch lifetime data—including hours of operation, plasma start-fail count, and visual inspection logs—can be recorded within laboratory information management systems (LIMS) compliant with 21 CFR Part 11 audit trail requirements. No proprietary firmware or embedded electronics are present; compatibility is purely mechanical and thermodynamic.

Applications

• Multi-element trace metal quantification in environmental water (drinking, wastewater, seawater) per ISO 17294-2
• Geochemical analysis of rock digests and soil extracts using HF-HNO₃-HPA digestion protocols
• Pharmaceutical elemental impurities testing aligned with ICH Q3D and USP <232>/<233>
• Food safety screening for toxic elements (As, Cd, Pb, Hg) in infant formula, cereals, and dietary supplements
• Metallurgical grade control of high-purity alloys (Ni-base superalloys, semiconductor-grade Cu)
• Academic research requiring low-background detection limits (sub-pg/g) in biological matrices (serum, urine, plant tissue)

FAQ

What is the recommended replacement interval for the SGM ICP Torch Tube?
Under standard operating conditions (aqueous samples, 1.5 L/min coolant gas, 1.2 kW RF power), typical service life ranges from 500–1,200 hours. Replacement is advised when plasma instability exceeds ±3% RF forward power fluctuation or when visible etching/cracking is observed under 10× magnification.
Is this torch compatible with oxygen- or nitrogen-supported plasmas?
Yes—the high-purity quartz composition resists oxidation and nitridation up to 800 °C. For O₂-mixed plasmas, pre-conditioning at 400 °C under inert gas for 30 minutes is recommended to remove adsorbed moisture prior to first use.
Can the torch be cleaned and reused?
Ultrasonic cleaning in 10% v/v HNO₃ followed by deionized water rinse is permissible for light salt deposits. However, thermal stress microcracks or permanent deformation are irreversible; visual inspection before each installation is mandatory per GLP practice.
Does SGM provide calibration or certification documentation?
Each package includes a traceable Certificate of Conformance with batch-specific quartz purity assay (ICP-MS verified), dimensional metrology report (CMM-measured), and thermal history log. NIST-traceable calibration is not applicable to passive consumables, but documentation satisfies ISO/IEC 17025 Clause 6.6.2 requirements.