Description
Specifications Table
Product Name – Density standard, 2.0812 g/ml at 20 °C
Quantity/Pack Size – 100 ml
Form – Liquid
Grade – Analytical Standard
Application – Calibration of densitometers, pycnometers, and hydrometers
Product Overview
The density standard (2.0812 g/ml at 20°C) is a high-precision reference material designed for the calibration and verification of densitometers, pycnometers, and other density-measuring instruments. Manufactured under stringent ISO 17025 guidelines, this standard ensures traceability to NIST (National Institute of Standards and Technology), guaranteeing exceptional accuracy and reliability in laboratory settings. The solution is formulated using ultra-pure reagents and stabilized to minimize evaporation and degradation, ensuring long-term consistency. Its low thermal expansion coefficient reduces temperature-induced errors, making it ideal for applications requiring tight tolerance control. The standard is supplied in a high-quality, leak-proof borosilicate glass bottle with a tamper-evident seal to prevent contamination. Each batch undergoes rigorous quality checks, including density verification at multiple temperature points, to ensure compliance with international standards. The accompanying Certificate of Analysis (CoA) provides detailed traceability data, uncertainty values, and expiration dates for full transparency. This density standard is an essential tool for laboratories seeking to maintain ISO/IEC 17025 accreditation or adhere to GLP (Good Laboratory Practice) protocols, offering a cost-effective solution for routine instrument calibration without compromising on precision.
FAQs
1. What is the shelf life of this density standard, and how should it be stored?
The density standard has a shelf life of 24 months from the date of manufacture when stored unopened in its original packaging. For optimal stability, store the bottle upright at a controlled temperature between 15°C to 25°C, away from direct sunlight and moisture. Once opened, use within 6 months and ensure the cap is tightly sealed after each use to prevent evaporation or contamination. Avoid storing near volatile chemicals or in areas with temperature fluctuations, as this can affect the standard’s accuracy.
2. Is this density standard compatible with automatic densitometers?
Yes, this density standard is fully compatible with most automatic densitometers, including those from leading brands like Anton Paar, Mettler Toledo, and Rudolph Research. Its formulation meets the viscosity and surface tension requirements for seamless integration with automated systems. However, always verify the instrument’s specifications to ensure the standard’s density range falls within the device’s operational limits. For best results, follow the manufacturer’s calibration procedures and allow the standard to equilibrate to the instrument’s operating temperature before use.
3. Can this standard be used for calibrating hydrometers or areometers?
This density standard is suitable for calibrating hydrometers and areometers, provided the instrument’s measurement range includes 2.0812 g/ml. To ensure accuracy, immerse the hydrometer in the standard at the specified temperature (20°C) and adjust the instrument’s readings accordingly. For hydrometers with a narrower range, consider using additional standards that cover the lower and upper limits of the scale. Always clean the hydrometer with distilled water and dry it thoroughly before and after calibration to prevent cross-contamination.
4. What is the uncertainty value for this density standard?
The expanded uncertainty for this density standard is ±0.0002 g/ml at a 95% confidence level (k=2), as documented in the Certificate of Analysis. This value accounts for contributions from raw material purity, temperature control during production, and measurement repeatability. The uncertainty is traceable to NIST standards, ensuring compliance with ISO Guide 34 and ISO/IEC 17025 requirements. For applications requiring tighter tolerances, consult the CoA for batch-specific data or contact our technical team for customized solutions.
5. How does temperature affect the density measurement, and is correction required?
Density is temperature-dependent, and this standard is certified at 20°C. For measurements taken at different temperatures, apply a correction factor using the standard’s thermal expansion coefficient (provided in the CoA). Most modern densitometers automatically compensate for temperature variations, but manual calculations may be necessary for older instruments. To minimize errors, allow the standard and the instrument to equilibrate to the same temperature for at least 30 minutes before measurement. Avoid using the standard at temperatures outside the 15°C–25°C range, as extreme conditions can alter its properties.
