Description
Specifications Table
Product Name – Iodide, Ion chromatography standard solution, Specpure®, I|- 1000µg/ml
Quantity/Pack Size – 100ml, 500ml
Form – Liquid (aqueous solution)
Grade – Specpure® (Traceable, ultra-pure)
Application – Ion chromatography calibration, anion analysis, environmental testing
Product Overview
This Specpure® iodide standard solution (1000µg/ml) is meticulously formulated for ion chromatography applications, offering unmatched purity and traceability to NIST SRMs. The aqueous solution is prepared in ultra-pure water with negligible matrix interference, ensuring baseline stability and minimal background noise during analysis. Its precise iodine concentration (1000µg/ml as I⁻) eliminates dilution errors, while the Specpure® certification guarantees lot-to-lot consistency critical for GLP/GMP compliance. The solution’s stability is enhanced with proprietary stabilizers, preventing iodine loss or oxidation over extended storage periods. Packaged in HDPE bottles with tamper-evident seals, it resists leaching and contamination, preserving integrity from first to last use. The absence of preservatives like mercury or azide makes it safer for disposal while maintaining analytical performance. Its broad linear response range accommodates both low-level environmental samples and high-concentration industrial matrices without requiring multiple standards. The solution’s compatibility with suppressed and non-suppressed IC systems ensures versatility across different instrument configurations, reducing the need for method adjustments.
FAQs
1. What is the shelf life of this iodide standard solution when unopened?
The unopened solution maintains its certified concentration for 24 months from the date of manufacture when stored at 15–25°C in its original packaging. Avoid exposure to direct sunlight or temperature fluctuations to prevent degradation of the iodine species.
2. Can this standard be used for ICP-MS or AAS analysis?
While optimized for ion chromatography, the solution’s ultra-pure matrix allows adaptation for ICP-MS or AAS after appropriate dilution. However, the iodine concentration (1000µg/ml) may require significant dilution for these techniques, and matrix matchers might be needed to compensate for spectral interferences.
3. How does the Specpure® grade differ from reagent-grade iodide standards?
Specpure® standards undergo additional purification steps to eliminate metallic and anionic contaminants below ppb levels, with certified accuracy ±0.5% of the stated concentration. Reagent-grade standards typically have wider tolerances (±2–5%) and may contain unquantified impurities that affect baseline stability in sensitive applications.
4. Is this solution compatible with autosampler vials for automated IC systems?
Yes, the solution’s low viscosity and particle-free formulation prevent clogging in autosampler needles or tubing. For best results, use polypropylene or glass vials with PTFE-lined caps to avoid iodine adsorption, and ensure the vial’s pH stability matches the sample matrix to prevent peak shifting.
5. What alternatives exist if I need a lower iodide concentration for trace analysis?
For sub-ppm applications, consider serial dilution using 18MΩ/cm deionized water or purchasing pre-diluted standards (e.g., 10µg/ml or 100µg/ml). Avoid using tap or distilled water, as residual chlorides or organics can introduce interference peaks in chromatograms.
