Description
Specifications Table
Product Name – Sulfur, plasma standard solution, Specpure®, S 1000μg/ml
Quantity/Pack Size – 50ml, 100ml, 500ml
Form – Liquid (aqueous solution)
Grade – Specpure® (ultra-high purity)
Application – ICP-OES, ICP-MS, AAS calibration; trace sulfur analysis
Product Overview
This Specpure® sulfur plasma standard solution (1000µg/ml) is meticulously formulated for laboratories demanding uncompromised precision in elemental analysis. The solution leverages ultra-high-purity sulfur dissolved in a stabilized aqueous matrix, eliminating matrix interference risks common in lower-grade standards. Its 1000µg/ml concentration offers optimal sensitivity for ICP-OES, ICP-MS, and atomic absorption spectroscopy (AAS) applications, ensuring linear calibration curves across broad dynamic ranges. The Specpure® certification guarantees traceability to NIST SRMs, with impurity levels strictly controlled below 10 ppb for critical elements (e.g., As, Se, Pb), making it ideal for environmental, pharmaceutical, and materials testing where sulfur quantification must meet GLP/ISO 17025 compliance. The solution’s long-term stability (12+ months at 2–8°C) minimizes recalibration frequency, while the acidified matrix (2% HNO₃) prevents sulfur precipitation or microbial growth. Each batch undergoes multi-point verification via ICP-OES cross-checking to confirm concentration accuracy within ±0.5%. Compatible with autodilution systems, the solution’s homogeneous composition ensures reproducibility even at micro-volume dispensings, reducing waste in high-throughput labs.
FAQs
1. What is the shelf life of this sulfur plasma standard solution when unopened?
The unopened solution remains stable for 18 months from the date of manufacture when stored at 2–8°C in its original amber glass bottle. Avoid freezing, as this may alter the matrix composition.
2. Can this standard be used for sulfur analysis in organic matrices like petroleum or polymers?
While optimized for aqueous-based techniques (ICP-OES/MS, AAS), the standard can serve as a reference for organic sample digestion workflows if the final digest is aqueous-compatible. For direct organic analysis, consider sulfur standards in organic solvents or matrix-matched CRMs.
3. How does the Specpure® grade differ from ACS or reagent-grade sulfur standards?
Specpure® standards undergo additional purification steps to reduce metallic and anionic impurities below 10 ppb, with certified traceability to primary standards. ACS/reagent grades may contain higher impurity levels (e.g., 50–100 ppb), potentially interfering with ultra-trace sulfur determinations.
4. Is this solution compatible with mercury-free lab protocols?
Yes, the solution contains no added mercury or mercury compounds. The stabilization matrix uses ultra-pure nitric acid (≤1 ppb Hg), aligning with mercury-free lab guidelines for environmental and clinical applications.
5. What dilution factors are recommended for creating working standards below 100 µg/ml?
For concentrations below 100 µg/ml, use Class A volumetric glassware and 2% HNO₃ (prepared from ultra-pure acid) as the diluent. A 1:10 dilution (1 ml standard + 9 ml diluent) yields 100 µg/ml; further 1:10 dilutions maintain linearity. Avoid plasticware for dilutions below 10 µg/ml to prevent sulfur leaching.
