Reference material for total volatile organic compounds (TVOCs) solution in methanol

Product Name:Reference material for total volatile organic compounds (TVOCs) solution in methanol

Specifications:2ml/bottle, 4 bottles

Packaging:Brown Ampere Bottle

Content:Blank, 0.01mg/mL, 0.1mg/mL, 1mg/mL

Components: Ethyl acetate, (methanol), benzene, toluene, n-undecane, ethylbenzene, p-xylene, m-xylene, o-xylene, styrene

Purpose:Mainly used for indoor environment detection, health and epidemic prevention departments to confirm and evaluate indoor environment detection and analysis methods, instrument calibration, and measurement quality control.

Certificate:With certificate (China Institute of Metrology)


The parameters are as follows:

number	Standard value of benzene mass concentration (mg/ml)		Standard value of toluene mass concentration (mg/ml)		Standard value of ethylbenzene mass concentration (mg/ml)
	Standard value	relative uncertainty	Standard value	relative uncertainty	Standard value	relative uncertainty
GBW(E)081154	1.00	5	1.00	5	1.00	5
GBW(E)081155	0.100	5	0.100	5	0.100	5
GBW(E)081156	0.1000	5	0.1000	5	0.1000	5
blank
number	Standard value of mass concentration of n-butyl acetate (mg/ml)		Standard value of mass concentration of o-xylene (mg/ml)		Standard value of mass concentration of meta xylene (mg/ml)
	Standard value	relative uncertainty	Standard value	relative uncertainty	Standard value	relative uncertainty
GBW(E)081154	1.00	5	1.00	5	1.00	5
GBW(E)081155	0.100	5	0.100	5	0.100	5
GBW(E)081156	0.1000	5	0.1000	5	0.1000	5
blank
number	Standard value of mass concentration of xylene (mg/ml)		Standard value of mass concentration of n-undecane (mg/ml)		Standard value of styrene mass concentration (mg/ml)
	Standard value	relative uncertainty	Standard value	relative uncertainty	Standard value	relative uncertainty
GBW(E)081154	1.00	5	1.00	5	1.00	5
GBW(E)081155	0.100	5	0.100	5	0.100	5
GBW(E)081156	0.1000	5	0.1000	5	0.1000	5
blank

Attached certificate style:

National standard materials（NCRM）
Reference material number: GBW (E) 081154~081156
Code
Standard accurate object nature prove book
Reference Material Certificate

Total Organic Compounds (TVOC) Solution Standard Reference Material
Total Volatile Organic Compounds

Batch number: 19002
Batch Number
Fixed value date: May 2019
Certification Date
Validity period: May 2020
Period Validity


Research and development (production) unit: China Academy of Metrology
Reference Marerial Producer
Unit Address: No. 18, North Third Ring East Road, Chaoyang District, Beijing
Address
Contact phone number:
Telephone
Email: crm-service@nim.ac , cn
Email
Version number: 1.0
Version




This standard substance is mainly used for indoor environmental testing, health and epidemic prevention departments to confirm and evaluate indoor environmental testing and analysis methods, instrument calibration, and measurement quality control.



1sample preparation

This standard substance is made from pure volatile organic compounds with a purity determined value, accurately prepared using the weight volume method, and uses methanol as the solvent. The TVOC standard substance set includes four components, divided into three concentrations and one blank. The total volatile organic compounds include benzene, toluene, ethylbenzene, xylene, o-xylene, m-xylene, styrene, n-butyl acetate, and n-undecane.

IITraceability and value determination methods

This standard substance ensures the traceability of its quality value by using measurement methods and measuring instruments that meet the requirements of metrological characteristics. The purity of pure volatile organic compounds was determined by gas chromatography in multiple laboratories. The standard value of the concentration of the standard solution is based on the prepared value and verified by gas chromatography (FID detector).

IIICharacteristic values and uncertainties

name	GBW(E)081154	GBW(E)081155	GBW(E)081156	Relative expanded uncertainty (%) (K=2)
	Concentration 1 (mg/mL)	Concentration 2 (mg/mL)	Concentration 3 (mg/mL)
Benzene/toluene	0.98	0.10	0.010	5
Toluene/methanol	1.00	0.10	0.010	5
Ethylbenzene/methanol	1.06	0.11	0.011	5
M-xylene/methanol	1.00	0.10	0.010	5
Paraxylene/methanol	1.00	0.10	0.010	5
O-xylene/methanol	1.03	0.10	0.010	5
Styrene/methanol	1.04	0.10	0.010	5
N-undecane/methanol	1.00	0.10	0.010	5
Butyl acetate/methanol	1.00	0.10	0.010	5

The uncertainty of standard values is mainly synthesized by the uncertainty components introduced during the preparation processes such as raw material purity, weighing, and constant volume.

4Uniformity inspection and stability assessment

According to JJF1343-2012 "General Principles and Statistical Principles for Determination of Standard Substances", the randomly sampled and packaged samples were subjected to uniformity testing and stability investigation of solution concentration using gas chromatography (FID detector). Test result: The uniformity meets the F-test rule, and the stability test is good.
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.

5Packaging, Storage, and Use

1. Packaging: This standard substance is packaged in glass ampoules, 2ml per vial. Accurately remove as needed during use.

2. Storage and use: Store under dark and refrigerated conditions. Before use, equilibrate at room temperature (20 ± 3) ℃ and shake evenly. Once the ampoule is opened, it should be used immediately and cannot be melted again before being used as a standard substance.

statement

1. This standard substance is only used for laboratory research and analytical testing work. We will not be held responsible for complaints caused by improper use or storage by users.

2. Upon receipt, please immediately verify the variety, quantity, and packaging. Relevant compensation is limited to the standard substance itself and does not involve any other losses.

3. The public is responsible for the complete certificate stamped with the "Special Seal for Standard Substances of China Institute of Metrology". Please keep this certificate safe.

If you need more information related to the application, please contact the technical consulting department.

Chromatogram:

Chromatographic Column Information: Wax Capillary Column 30m * 0.32mm * 0.5 µ m

Chromatographic peak sequence (retention time from small to large)

1-Benzene, 2-toluene, 3-butyl acetate, 4-undecane, 5-ethylbenzene, 6-methylbenzene, 7-p-xylene, 8-o-xylene, 9-styrene