Standard substance product of n-butanol solution in ethanol

BWQ7579-2016，Standard substance for n-butanol solution in ethanol
English name 1-Butanol in Etanol
Specification 2mL
Production date: July 10, 2018
Valid for 12 months
CAS 71-36-3
Packaging ampoules
Form liquid
Matrix ethanol
Analysis method: Gas chromatography hydrogen flame ionization detector (FID)
Research and development based on air and exhaust gas monitoring and analysis methods (fourth edition supplement).

This standard substance can be used as a working standard for daily analysis and testing; It can also be used for laboratory quality control such as testing method evaluation and instrument calibration.

1、 Sample preparation

This standard substance is prepared using n-butanol with a purity determined value as the solute and chromatographically pure ethanol as the solvent in a clean laboratory at room temperature of 20 ± 3 ℃ using the weight volume method.

2、 Traceability and value determination methods

The concentration standard value of this standard substance is based on the prepared value and verified by gas chromatography. By using preparation, measurement methods, and measuring instruments that meet the requirements of metrological characteristics, the traceability of the quality values of standard materials is ensured.

3、 Characteristic values and extended uncertainty

Expanded uncertainty of component standard values (k=2) matrix
N-butanol 6000 μ g/mL 2% ethanol

The expanded uncertainty of standard values is mainly composed of uncertainties such as raw material purity, weighing, constant volume, uniformity, and long-term stability.

4、 Uniformity inspection and stability assessment

Randomly sample the packaged samples and use gas chromatography to perform uniformity testing and long-term stability tracking of the standard substance. The results indicate that the uniformity conforms to the F-test rule and the stability assessment is good.

From the date of self determination of the quality value of this standard substance, the validity period is 12 months. The development unit will continue to track and monitor the stability of the standard substance. If any changes in the quantity value are found during the validity period, the user will be notified in a timely manner.

5、 Packaging, Storage, and Use

Packaging: This standard substance is packaged in ampoules with a specification of 2mL. It should be protected against breakage when carried or transported.

Storage and use: Store under refrigerated, sealed, and dark conditions. Before use, it should be equilibrated at room temperature (20 ± 3 ℃) and shaken 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. During use, strict precautions should be taken to prevent contamination.

Uncertainty of component concentration CAS
N-butanol 6000 μ g/mL 2%