Tetrahydrophene is mainly used as an odorant, also known as a deodorizer, for gas fuels such as liquefied gas, city gas, and natural gas. It can also be used as raw materials for the production of medical, agricultural, and optical products. At present,

According to international standardsAccording to the requirements, the odorant for urban gas, natural gas and other gases must use tetrahydrothiophene, and the previously used odorants such as ethanethiol have been banned.

Determination of the amount of tetrahydrothiophene added as an odorant: The relevant regulations on the amount of odorant added in the Design Code for Urban Gas (GB50028-2020) are as follows:

1. No gas leakage into the air, reaching 20% of the lower explosive limit, should be detectable;

2. When gas leaks into the air and reaches the harmful concentration allowed for human health, it should be noticeable.

In its interpretation, it is further suggested that when using tetrahydrothiophene (THT) for odorization of natural gas, the dosage of odorant should not be less than 20mg/Nm3, and the concentration at the central end should not be less than 8mg/Nm3.

1、 Instrument configuration

1. Host: GS-300B gas chromatograph

2. Injector: Inert treatment injection valve

3. Chromatographic column: tetrahydrothiophene specific column

4. Detector: TCD

5. Data processing: dedicated chromatography workstation

6. Built in helium gas cylinder

2、 Detection range：5~200mg/m3

3、 Compliant with standards:GB/T40704-2021

GB 50028-2020

4、 Scalability:It is convenient to install a gas component and calorific value detection system.

5、 Analyzer parameters

1. Sensitivity: S ≥ 6000mv.ml/mg

2Testing items: tetrahydrothiophene content, expandable nitrogen, carbon dioxide, methane, ethane, propane, isobutane, n-butane, isopentane, n-pentane, low calorific value, high calorific value, density, gasification rate

3. Detection range 5~200mg/m3

4. Noise: ≤ 0.02mv

5. Drift: ≤ 0.05mv/H

6. Temperature control range: 0~399 ℃

Temperature control accuracy: better than ± 0.1 ℃

Temperature gradient: ≤ 1%

7. Carrier gas purity: 99.999%

8. Sampling method: gas sampler or online use

9. Injection method: gas injection valve

10. Number of digits: 24 digits

11. Sampling period: 60 times/second

12. Zui small resolution: 0.001mv

13. Integral sensitivity: 0.001mV.S

14. Analysis time: 5 minutes

15. Zui High Power: 500W

16. Power supply: AC 220V

17. Instrument size: 400 * 210 * 380

18. Instrument weight: 12KG