Gases
CIL is pleased to offer a wide variety of gases enriched with 13C, D, 15N, and/or 18O. We also offer gas mixtures and a variety of packaging options (e.g., cylinders, fittings, regulators).
Related Resource
Stable Isotope-Labeled Gases
Filters:
Calibrant Gases
- Calibrant Gases(8)
- N/A(227)
Packaging Types
- Adaptor(3)
- Breakseal Flask(1)
- Cylinder(17)
- Lecture Bottle(8)
- Regulator(2)
Grade
- Research(235)
Molecular Weight Range
- 0-100 g/mol(180)
- 101-200 g/mol(10)
- N/A(45)
Product Form
- Individual(197)
- Mixture or Set(2)
- N/A(36)
Filters:
Calibrant Gases
- Calibrant Gases(8)
- N/A(227)
Packaging Types
- Adaptor(3)
- Breakseal Flask(1)
- Cylinder(17)
- Lecture Bottle(8)
- Regulator(2)
Grade
- Research(235)
Molecular Weight Range
- 0-100 g/mol(180)
- 101-200 g/mol(10)
- N/A(45)
Product Form
- Individual(197)
- Mixture or Set(2)
- N/A(36)
Calibrant Gases
We are pleased to offer four CO2 standards for use in 13C-urea breath analysis. These gas calibration standards are designed to mimic 13CO2 levels in normal breath (baseline calibrant) and at three enriched levels (low-, mid-, and high-level calibrants). Each is gravimetrically prepared and analyzed for 13C content by isotope ratio mass spectrometry (IRMS). The 13C content is expressed as delta value vs. PDB (Pee Dee Belemnite), with the enriched calibrant gases further defined by their d13C DOB values.
Frequently Asked Questions
When will a gas liquefy? A liquefied gas is a gaseous substance at ambient temperature and pressure that undergoes liquefaction by pressurization and/or refrigeration. This process compresses the gas, making it suitable for gas carriage. As these gases are typically flammable with inherent safety hazards, they must be handled with care and transported by a suitable gas carrier. Examples of gases that liquefy include ammonia, 1,3-butanediene, carbon dioxide, propane, and ethane.
How do you calculate the approximate pressure in a cylinder at 20°C? For ideal gases, the pressure can be calculated using the combined gas law: P1V1/T1 = P2V2/T2. To solve for P, factor in the following known values: volume of cylinder (e.g., 3 L), volume ordered (e.g., 20 L), temperature (i.e., standard – 273 K, atmospheric – 293 K), and atmospheric pressure (i.e., 14.7 psi). This equation does not account for the nonideality of gases nor does it apply to gases that liquefy in the cylinder.
Which gases can be refilled? Examples of gases that can be refilled are carbon dioxide, carbon monoxide, methane, and nitrogen.
Example References
Sultana, N.; Zhao, J.; Zheng, Y.; et al. 2019. Stable isotope probing of active methane oxidizers in rice field soils from cold regions. Biol Fert Soils, 55, 243-250. Read more.
Apps, S.L.; White, A.J.P.; Miller, P.W.; et al. 2018. Synthesis and reactivity of an N-triphos Mo(0) dinitrogen complex. Dalton Trans, 47(33), 11386-11396. PMID: 30062342
Lynch, L.M.; Machmuller, M.B.; Cotrufo, M.F.; et al. 2018. Tracking the fate of fresh carbon in the Arctic tundra: Will shrub expansion alter responses of soil organic matter to warming? Soil Biol and Biochem, 120, 134-144. Read more.
Follett, C.L.; White, A.E.; Wilson, S.T.; et al. 2018. Nitrogen fixation rates diagnosed from diurnal changes in elemental stoichiometry. Limnol Oceanogr. Read more.
Liu, Y.; Misztal, P.K.; Xiong, J.; et al. 2018. Detailed investigation of ventilation rates and airflow patterns in a northern California residence. Indoor Air, 28(4), 572-584. PMID: 29665159
Maity, A.; Pal, M.; Maithani, S.; et al. 2016. Molecular hydrogen in human breath: a new strategy for selectively diagnosing peptic ulcer disease, nonulcerous dyspepsia and Helicobacter pylori infection. J Breath Res, 10(3), 036007. PMID: 27448107