Good news! Weiyel has successfully applied for 15 national reference materials.

Weiyel has successfully obtained approval for 15 national-level reference materials, marking another breakthrough in the field of reference material application! This successful application signifies a new level of advancement in Weiyel's R&D and innovation capabilities.

**Silver Nitrate Titration Solution Reference Material:** This reference material can be used for volumetric analysis, laboratory proficiency testing, quality control, certification assessment, and titration analysis and related analytical method validation and evaluation in environmental, food, chemical, health, and educational fields.

**Osmolality Reference Material (Sodium Chloride Solution):** This reference material is primarily used for the calibration of osmolality meters and the comparison of osmolality.

**Water Hardness Solution Reference Material:** This reference material is mainly used for the verification or calibration of water hardness meters, quality control of water hardness measurement, and the validation and evaluation of analytical methods.

**Ethylbenzene Solution Reference Material in Methanol:** This reference material is mainly used for ambient air quality, water quality testing, and monitoring of safety risks associated with residual drug solvents. It can also be used to evaluate laboratory measurement methods.

Isooctane-n-hexadecane solution standard reference: This standard reference reference is mainly used in the fields of oil and environmental analysis, instrument calibration, and can also be used to evaluate laboratory measurement methods.