NCS Pure Iron Flux for Direct-Reading Spectrometry

Overview

NCS Pure Iron Flux is a high-purity, matrix-matched flux specifically engineered for use in direct-reading optical emission spectrometry (OES), particularly with spark discharge instruments such as the Thermo Fisher ARL 8860. As a critical consumable in solid metallic sample preparation, this flux serves to homogenize sample composition during arc/spark excitation, suppress spectral interferences from oxide formation, and stabilize plasma temperature—thereby enhancing analytical precision, signal-to-noise ratio, and long-term calibration stability. Its ultra-low impurity profile (<10 ppm total non-iron elements) ensures minimal contribution to background emission lines across the UV–VIS spectral range (130–800 nm), making it suitable for trace-element quantification in low-alloy steels, stainless steels, and high-purity iron-based reference materials. The flux is supplied in pre-weighed, sealed aluminum-laminated pouches to prevent moisture uptake and oxidation prior to use.

Key Features

• Ultra-high purity: Fe ≥ 99.995% (w/w), with controlled trace levels of C, Si, Mn, P, S, Cr, Ni, Cu, Al, and Ti—certified via ICP-MS and GD-OES
• Consistent particle size distribution (D₅₀ ≈ 45 µm) optimized for uniform packing density in graphite electrodes and cup electrodes
• Low hygroscopicity and oxygen affinity, ensuring stable performance under ambient laboratory conditions (20–25°C, 30–60% RH)
• Batch-certified with full traceability to NCS internal reference standards and ISO/IEC 17025-accredited calibration protocols
• Compatible with both argon-flushed and vacuum-type OES systems without requiring purge time extension or excitation parameter recalibration

Sample Compatibility & Compliance

This flux is validated for use with ferrous alloys containing ≤ 5% total alloying elements (e.g., carbon steels, low-alloy structural steels, ferritic stainless steels). It is not recommended for high-silicon (>1.5%) or high-aluminum (>0.5%) samples due to potential refractory oxide formation. All production batches comply with ASTM E415–22 (Standard Test Method for Determining Elemental Composition of Steel by Spark Atomic Emission Spectrometry) and ISO 11573:2020 (Metallic materials — Spark discharge atomic emission spectrometry — General requirements). Documentation includes CoA (Certificate of Analysis), MSDS (in accordance with GHS Rev. 10), and batch-specific uncertainty statements aligned with EURACHEM/CITAC Guide CG4.

Software & Data Management

While the flux itself is a consumable and does not interface directly with instrument software, its use is fully integrated into routine QC/QA workflows supported by Thermo Fisher’s ARl QUANTOM software and Bruker’s SPECTRUM software. Each lot number is linked to an internal LIMS record at NCS, enabling full audit trail from raw material sourcing through final packaging. For laboratories operating under GLP or ISO 17025 accreditation, batch documentation supports 21 CFR Part 11-compliant electronic record retention when imported into validated data management platforms.

Applications

• Routine quality control of incoming raw materials (scrap, pig iron, ferroalloys) in foundries and steel mills
• Production line verification of heat-treated components per ASTM A370 and EN 10084 specifications
• Reference material certification for CRM producers (e.g., IRMM, NIST SRMs) requiring certified Fe-based matrices
• Method validation studies for multi-element OES analysis in accordance with ISO/IEC 17025 Clause 7.2.2
• Interlaboratory comparison programs organized by national metrology institutes (e.g., CNAS Proficiency Testing Scheme PT017)

FAQ

What is the shelf life of NCS Pure Iron Flux under proper storage?

24 months from date of manufacture when stored unopened in original packaging at ≤25°C and <60% relative humidity.

Can this flux be used with handheld LIBS or XRF analyzers?

No—this product is formulated exclusively for stationary spark OES systems; it is not compatible with laser-induced breakdown or X-ray fluorescence excitation geometries.

Is there a certificate of conformance available for each shipment?

Yes—each delivery includes a signed Certificate of Analysis listing measured impurity concentrations, particle size distribution, and compliance with ASTM E415 Annex A1.

How should opened packages be handled to maintain integrity?

Opened pouches must be transferred to a desiccator with indicator silica gel and used within 72 hours; resealing is not recommended.

Does NCS provide technical support for method optimization using this flux?

Yes—application engineers offer remote consultation on electrode geometry, pre-spark duration, and integration time adjustments specific to ARL 8860, SPECTROLAB, and FOUNDRY-MASTER Smart platforms.