This standard substance is mainly used for measuring instrument calibration, analytical method evaluation and quality control, as well as the content determination and residue detection of corresponding components in the fields of food, hygiene, environment and agriculture. It can also be used as a standard stock solution and prepared into various types through successive dilutions. Standard solution for work, etc.
Sample Preparation
This standard material is made of pure pyridaben with accurate purity as raw material, pesticide residue methanol as solvent, and accurately prepared by the weight-volume method.
Pyridaben (alias: pyridaben), English name: Pyridaben, CAS: 96489-71-3
Traceability and valuation method
This standard material uses the prepared value as the standard value, and uses HPLC-DAD to compare the batch of standard materials with the quality control control sample to verify the prepared value. Through the use of preparation methods, measurement methods and measuring instruments that meet the requirements of metrological characteristics, the traceability of the value of the reference material is guaranteed.
Characteristic value and uncertainty
Number | Name | Standard value(μg/mL) | Relative expanded uncertainty(%)(k=2) | BWY272959 | Pyridaben in Methanol | 100 | 3 |
The uncertainty of the standard value is mainly composed of raw material purity, weighing, constant volume, uniformity, stability and other uncertainty components.
Uniformity inspection and stability inspection
According to JJF1343-2012 "General Principles and Statistical Principles for Determining the Value of Standard Materials", random samples were taken of the subpackaged samples, and the uniformity and stability of the solution concentration were inspected. The results show that the standard material has good uniformity and stability. The quality value of this standard material is valid for 24 months from the date of setting the value. The development unit will continue to track and monitor the stability of the standard material. If there is any change in the value within the validity period, the user will be notified in time.
Packaging, transportation and storage, use and precautions
1. Packaging: This standard material is packaged in a borosilicate glass ampoule, about 1.2mL/piece. When pipetting or diluting, please refer to the pipette volume. 2. Transportation and storage: transport in ice bags, avoid squeezing and collision during transportation; store under refrigerated and dark conditions. 3. Use: Equilibrate at room temperature (20±3℃) before unsealing, and shake well. Once the ampoule is opened, it should be used immediately. It cannot be used as a standard substance after being sealed again.
Scope of application (this standard solution is applicable but not limited to the following analytical standards)
GB 2763 <National Food Safety Standard Maximum Residue Limits of Pesticides in Foods> SN/T 2432 <Method for the determination of pyridaben residues in import and export food> | 
