This standard substance is mainly used in the fields of food, hygiene, environment, agriculture, etc. The content of the corresponding components, residual detection and analytical instrument calibration, analysis method evaluation and quality control in the detection process.
Sample Preparation
This standard substance is made of pure dicamba with accurate purity as the raw material, methanol as the solvent, and accurately prepared by the weight-volume method.
Dicamba, English name: Dicamba, CAS: 1918-00-9
Traceability and valuation method
This standard material uses the prepared value as the standard value of the concentration of the standard material. The prepared standard material and the quality control reference sample are calculated by high performance liquid chromatography (HPLC) 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) |
BWY272957
| Dicamba in Methanol | 1000 | 3 |
The uncertainty of the standard value is mainly composed of raw material purity, weighing, constant volume, uniformity, long-term stability and other uncertainty components.
Uniformity inspection and stability inspection
With reference to the technical specifications of the national "Class 1 Standard Substances", random sampling is carried out on the subpackaged samples. High performance liquid chromatography (HPLC) was used to inspect the uniformity and stability of the solution concentration. Test result: the uniformity meets the F test rule, and the stability is well investigated.
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, storage and use
1. Packaging: This standard substance is packaged in a glass ampoule, about 1.2mL/piece. When pipetting or diluting, please refer to the pipette volume.
2. Storage and use: Store in refrigeration and protected from light. Before use, equilibrate at room temperature (20±3℃) and shake evenly. Once the ampoule is opened, it should be used immediately. It cannot be used as a standard substance after being sealed again.
