Description
Specifications Table
Product Name – Chromate, Ion chromatography standard solution, Specpure®, CrO₄²⁻ 1000µg/ml
Quantity/Pack Size – 100ml, 500ml
Form – Liquid (Aqueous Solution)
Grade – Specpure® (Ultra-High Purity)
Application – Ion Chromatography, Trace Analysis, Environmental Testing
Product Overview
This Specpure® Chromate ion chromatography standard solution delivers unmatched precision with a certified concentration of 1000µg/ml, specifically formulated for demanding analytical workflows. The ultra-high purity grade eliminates matrix interferences, ensuring consistent baseline stability and peak resolution in ion chromatography systems. Each batch undergoes rigorous multi-point calibration against NIST-traceable references, with certification documentation provided for GLP/GMP compliance. The aqueous formulation maintains long-term stability when stored under recommended conditions, with minimal degradation even after repeated freeze-thaw cycles. The solution’s low particulate content (<0.2µm filtered) prevents column clogging in high-sensitivity detectors, while the optimized pH range (7.5-8.5) ensures compatibility with most anion-exchange columns. Packaged in HDPE bottles with tamper-evident seals, the solution resists leachables that could compromise analytical integrity. The 100ml and 500ml pack sizes offer flexibility for both routine calibration and high-throughput laboratories, with the larger volume reducing frequent recalibration needs.
FAQs
1. What is the shelf life of this Chromate 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. Always verify the expiration date on the certificate of analysis.
2. Can this standard be used with conductivity detectors in ion chromatography?
Yes, the solution is fully compatible with conductivity detectors. The ultra-low background conductivity (<5 µS/cm) ensures minimal baseline noise, while the optimized ionic strength prevents peak tailing in gradient elution methods.
3. What alternatives exist for lower concentration Chromate standards?
For applications requiring diluted standards, you can prepare working solutions from this 1000µg/ml stock using deionized water (18.2 MΩ·cm). Alternatively, some suppliers offer pre-diluted 100µg/ml or 10µg/ml standards for convenience.
4. How should I handle potential precipitation in the solution?
Chromate solutions may form microcrystals if exposed to temperatures below 5°C. Gently warm the bottle to 20-25°C in a water bath and invert several times to redissolve any precipitate. Avoid microwave heating to prevent concentration changes.
5. Is this standard suitable for ICP-MS analysis?
While primarily designed for ion chromatography, the solution can be used for ICP-MS after appropriate dilution (typically 1:1000) to match the instrument’s linear range. Note that the matrix may require internal standardization for accurate quantification.
