Description
Specifications Table
Product Name – Cobalt, plasma standard solution, Specpure®, Co 1000µg/ml
Quantity/Pack Size – 50ml, 100ml, 500ml
Form – Liquid (Aqueous Solution)
Grade – Specpure® (Ultra-High Purity)
Application – ICP-OES, ICP-MS, AAS Calibration
Product Overview
This Specpure® cobalt plasma standard solution (1000µg/ml) is engineered for laboratories demanding uncompromising accuracy in trace metal analysis. Formulated using ultra-high-purity cobalt (Co) in a stabilized aqueous matrix, it eliminates matrix interferences that plague lower-grade standards. The solution undergoes rigorous multi-stage purification to remove particulate and ionic contaminants, ensuring baseline stability during ICP-OES, ICP-MS, or AAS calibration curves. Its certified concentration of 1000µg/ml (1mg/ml) provides optimal signal intensity without requiring excessive dilution, reducing preparation errors. The Specpure® grade guarantees lot-to-lot consistency with NIST-traceable certification, critical for GLP/GMP compliance. Packaged in HDPE bottles with tamper-evident seals, the solution resists leaching and photodegradation, preserving integrity during storage. Unlike generic standards, this formulation includes proprietary stabilizers to prevent cobalt precipitation or oxidation over extended use. The low acidity (≤2% HNO₃) minimizes instrument corrosion while maintaining solubility. Each batch is tested for 20+ elemental impurities via ICP-MS, with results provided in the included Certificate of Analysis. For labs requiring sub-ppb detection limits, this standard delivers the purity and stability needed to validate complex matrices like environmental, clinical, or geological samples.
FAQs
1.What is the shelf life of this cobalt plasma standard after opening?
When stored at 15–25°C in the original bottle with the cap tightly sealed, the solution remains stable for 12 months after opening. Avoid exposure to direct sunlight or temperature fluctuations, as these can accelerate degradation of the stabilizers. 2.
2.Can this standard be used for both ICP-OES and ICP-MS applications?
Yes, the 1000µg/ml concentration is optimized for direct use in ICP-OES while allowing precise dilution for ICP-MS applications. The ultra-low impurity profile (<10 ppt for most interferents) ensures compatibility with high-sensitivity mass spectrometry. 3.
3.Is this solution compatible with organic solvents for specific sample preparations?
The aqueous matrix is designed for water-based systems. For organic solvent compatibility, pre-dilution with a miscible solvent like methanol or acetone is required, but this may alter the calibration curve and should be validated separately. 4.
4.What alternatives exist if I need a lower concentration of cobalt standard?
For concentrations below 1000µg/ml, serial dilution using ultra-pure nitric acid (1–2% v/v) is recommended. Alternatively, ready-to-use standards at 100µg/ml or 10µg/ml are available under the same Specpure® line for convenience. 5.
5.How is the concentration of 1000µg/ml verified during manufacturing?
The concentration is verified via gravimetric preparation using NIST-traceable cobalt metal, followed by cross-validation against primary standards using ICP-OES. Each batch undergoes triple-point calibration to ensure accuracy within ±0.5% of the stated value.
