Reference Material for Aqueous Suspended Matter Solution 60mg/L

This reference material (RM) is intended for routine analysis, detection, environmental monitoring, food testing, confirmation of relevant standards and methods, as well as laboratory quality control purposes such as method evaluation and instrument calibration.

1. Sample Preparation This RM was prepared using solutes of high-purity substances with accurately determined purity. Prepared by the weight-volumetric method in a clean laboratory at room temperature (20 ± 3) °C, using ultra-pure water as the solvent.

2. Traceability and Value Assignment Method The certified value of this RM is based on the verified value, with gravimetric analysis used for value verification. Traceability of the RM value to the SI is ensured through the use of preparation methods, measurement procedures, and measuring instruments meeting metrological characteristics requirements.

3. Characteristic Value and Expanded Uncertainty

The expanded uncertainty of the standard value is synthesized primarily from the uncertainties associated with raw material purity, weighing, volumetric filling, homogeneity, and long-term stability.

4. Homogeneity Assessment and Stability Study Homogeneity and stability were monitored in accordance with JJF 1343-2022 "Value Assignment and Homogeneity/Stability Assessment of Reference Materials." Results demonstrate good homogeneity and stability of this RM. This RM has a validity period of 12 months from the date of value assignment. The developing organization will continue to monitor the stability throughout this period. Users will be promptly notified should any changes occur within the validity period.

5. Packaging, Storage & Usage

• Packaging: Packaged in polyethylene plastic bottles. Protective measures against breakage should be taken during handling or transportation.
• Storage & Usage: Store sealed at ambient temperature. Prior to use, equilibrate to (20 ± 3) °C and shake thoroughly to ensure homogeneity. Strictly avoid contamination during use.

Disclaimer:

1. This RM is intended solely for laboratory research and analytical testing. The supplier shall not be held liable for complaints arising from improper user handling or storage.
2. Upon receipt, immediately verify the item, quantity, and packaging. Any claims for compensation are limited solely to the RM itself and exclude any other consequential losses.