GBW National Standard

1GBW National StandardOverview

This standard substance is mainly used for pesticide residue detection in the fields of environment, food, occupational health, agriculture, etc. It can also be used in pesticide production departments and testing laboratories for laboratory quality control such as product quality, monitoring method evaluation, and instrument calibration; It is also suitable as a specialized standard substance for certification and assessment sites.

IIRaw material sources and preparation processes

This standard substance uses pesticide standard samples with purity determined values as raw materials, and uses chromatographically pure acetone as the solvent at room temperature20℃±4℃The use of weight in clean laboratories-Prepared using the capacity method.

IIIRecognized value and uncertainty

The uncertainty of standard values is synthesized by the uncertainty components introduced by raw material purity, weighing, constant volume, and temperature changes.

4Uniformity and stability testing

According to the national standard material technical specifications, gas chromatography is used for uniformity and stability testing, proving that this standard material has good uniformity and stability. The validity period of this standard substance is from the date of self determination1Year. The research and development unit will continue to track and monitor the stability of the standard substance. If any changes in the value are found during the validity period, the user will be notified in a timely manner.

5Measurement method for characteristic values

This type of standard substance isweight-The volumetric method is used to prepare the concentration standard value, and the national pesticide residue analysis standard sample gas chromatography method is used for quantity verification.

VITraceability description

By using preparation, measurement methods, and measuring instruments that meet the requirements of metrological characteristics, ensure the traceability of the quality values of standard materials.

7GBW National StandardCorrect usage instructions

Before use, the temperature should be kept constant until20℃±4℃ and shake thoroughly to ensure uniformity. Once the ampoule is opened, it should be used immediately and cannot be melted again before being used as a standard substance.

8Transportation and Storage

This standard substance is packaged in glass ampoules, with each vial1mLWhen carrying or transporting, it should be protected against breakage and frozen（–18℃±2℃）light-proofpreservation.

9Safety Warning

This standard substance belongs to toxic and harmful substances. When using it, attention should be paid to protection, wearing masks and latex gloves, avoiding inhalation and direct contact with the skin.