Nitrogen Purity Testing By USP: Parameters, Impurities, and Methods Testing Laboratories · Global Voices
The purity of nitrogen is one of the most important parameters in the use of gas for industrial needs, especially when nitrogen is used as inert gas, process gas, blanketing gas, purging gas, or gas for the pharmacycal and manufacturing applications.
In the context of laboratory testing, nitrogen purity is not only visible to the percentage of N per cent, but it can also involve checking on various impurities It's potentially affecting the quality and capacity of the gas to the specifications it requires.
For a need that refers to USP Nitrogen, testing can include the determination of nitrogen levels and certain impurities checks such as oxygens and carbon monoxide, according to the prevailing monograph requirements.
Default Based on Nitrogen Purity Testing
For industries, nitrogen testing in the lab can be used to ensure that the gas is accepted or used in the process of fulfilling the terms of the set quality.
Verification of the purity of Gas
Testing helps ensure actual nitrogen levels in samples and compare them to the specifications required.
Impurities Identification
Besides N as the main component, testing can be used to evaluate the existence of other components like:
- Oxygen (O religion)
- Carbon Monoxide (CO)
- Carbon Dioxide.
- Water / motive
- Other Impurities fit the needs and standards of testing
Quality Control and Supplier Verification
Lab testing results can be used to support:
- Incoming gas inspection
- Quality control
- Supplier qualification
- Verification Certificate of Analysis (COA)
- Investigations on gas quality changes
- Audit and quality documentation
Support Specification Compatibility
The test data can be compared to the customer specs, industrial standards, or the pharmaceutical requirements used as reference.
Purity Nitrogen Testing Parameters
Nitrogen purity doesn't always mean just measuring N concentration. In testing the quality of the gas, impurity components can be an important part of the evaluation.
| Parameter | Testing Destination |
|---|---|
| Nitrogen (N spans) | Set nitrogen main component level |
| Oxygen (O religion) | Evaluate the existence of oxygen as impunity |
| Carbon Monoxide (CO) | Set CO level in nitrogen |
| Carbon Dioxide. | Evaluate the existence of CO as necessary testing |
| Water / Moisture | Determines water content or moisture in gas |
| Odor | Evaluation of the smell characteristics according to the current requirements |
Not all of these parameters should be tested with the same method. The analysis method is determined based on the parameter to be measured, expected concentration, limit determination, sample characteristics, and the standard used.
USP Nitrogen: Purity and Impurity · Global Voices
For Nitrogen in the USP, the purity requirement is not only related to the content of N.
At Nitrogen Monograph, USP determines NLT nitrogen content 99.0% v / v N test using assay Gas Chromatography (GC) with Thermal Conductivation Detector (TCD).
One of the immunances checked is oxygen, with 1.0% NMT requirements. Carbon monoxide also has a lower limit, which is NMT 10 ppm on that monograph requirement.
Thus, the concept of testing can be understood as:
Nitrogen Purity
It's important because high-level gas is not necessarily to automatically meet all the quality requirements needed for a specific application.
Note: The requirements must always refer to the monograph and standard editions used in projects or customer specifications. Don't equalize nitrogen terms with other gas products like 97 percent nitrogen, because they both have different requirements.
Purity Nitrogen Testing Method
Chromatography gas with TCD
Chromatography gas is one of the techniques used to determine the composition of the gas.
In USP nitrogen testing, Thermal Conductivation Detector (TCD) is used to detect components based on its thermal conductivity differences against gas carrier.
GC-TCD usage allows gas components to be separated first in the column before being detected.
Generally speaking:
Sample Gas Separation to Columbn KnTCD Detection
The analysis can then be used to determine the composition or the amount of gas components in the sample.
Why was TCD used?
TCD has characteristics as a detector that can be used for various components of gas, including gases that don't give strong response to hydrocarbons like FID detectors.
That allows TCD to be relevant to permanent gases and gas composition analysis, including nitrogen and oxygens.
Purity Nitrogen Not Always Testing With One Method
One of the important things in Nitrogen Purity Testing is to understand that any immunity can have a different analysis need.
For example:
N
Analyable using suitable Chromatography-TCD gas configuration.
Carbon Monoxide
Need attention to the concentration level because the terms can be at the ppm level.
Water / Moisture
Moisture testing can require a different method or instrumentation than GC, depending on the specifications and precision limit required.
Why is Nitrogen Purity important to industry?
The nitrogen quality can directly impact the process when gas is used as part of the production system.
Pharmaceutical Industry
Nitrogen can be used in various processes that require inert environments or oxidation control.
The quality of the gas becomes essential when nitrogen is used in processes that have certain purity requirements.
Food & Beverage
Nitrogen can be used for blanketing Or an app associated with oxygen protection products.
Certain impurities can be an important parameter depending on applications and product specs.
Chemical Industry
Nitrogen is often used as:
- Inerting gas
- Purging gas
- Blanketing gas
- Gas process
The nitrogen quality can affect the state of process and potential contamination.
Oil & Gas
Nitrogen can be used for various operations needs such as:
- Purging
- Inering
- Blanketing
- Pressing
Gas quality testing can be used to verify the gas used in the process.
Manufacturing & Industrial Projects
Nitrogen is also used in various manufacturing processes that require gases with certain characteristics.
Certification of Analysis (COA) vs Laboratory Testing
In industrial practice, nitrogen suppliers can generally provide the Certification of Analysis (COA) as a document that shows the quality of the product.
However, CoA and the independent lab testing have different functions.
CoA shows the test results performed or specified by the suppliers based on batches or specific products.
Meanwhile, independent lab testing can be used for:
- Verify received gas quality
- Supplier qualification
- Cross-check CoA
- Quality change investigation
- Quality assertion
- Audit and documentation
It becomes more relevant if nitrogen is not only tested on its source, but it also needs to be verified in storage or point of use.
The conditions of the distribution system, storage, regulator, connection, and handling can be a part that needs to be noticed while investigating the quality of gas.
Nitrogen Testing Scope
The need for testing can be adjusted to the purpose of the analysis and specs used.
Purity Testing Nitrogen
The subjugation of N level is a major component.
Oxygen Testing
Pregnancy O procure as immunity.
Carbon Monoxide Testing
A CO-level suppression at a qualified concentration.
Carbon Dioxide Testing
The content evaluation of the CO is consistent with the need for analysis.
Water / Moisture Testing
The water content testing is in nitrogen for applications that require moisture control.
Gas Composition Analysis
Analysis of the gas composition to get the component profile in the sample.
Why the important laboratory selection?
For nitrogen testing, laboratory selection is not only based on the ability to have instruments.
Some aspects need to be noticed among others:
- Test method used.
- Scope or lab competence scope.
- The type of parameter that can be analyzed.
- Detection limit matches specifications.
- Calibration and equipment search.
- Lab personnel competition.
- The format of the report and interpretation results.
- The results match the standard or specifications requested by the customer.
Power Hidea Purity Testing Nitrogen Service
PT Hidea Core provides lab testing service for needs Nitrogen Purity Testing, Nitrogen Impurity Testing, and Gas Composition Analysis.
Testing can be adjusted to required standards, analysis parameters, sample characteristics, and customer technical needs.
Service can be used for needs:
- Quality Control
- Incoming Inspection
- Supplier Verification
- COA Verification
- Gas Quality Assessment
- Industrial Gas Testing
- Gas Composition Analysis
- Technical Investigation
For needs that refer to USP, parameters and acceptance criteria need to be determined based on monograph and the standard edition in effect.
Nitrogen Testing Information
For Nitrogen Purity Testing, Nitrogen Impurity Testing, or Gas Composition Analysis, please contact:
Custom Service PT Hidea Core
📞 +62 877-6494-5736
📧 labservices@hidea.id
The Power Hidea team can help consult on testing parameters, methods, sample needs, and the interpretation of laboratory results to the industry.
PT Hidea Core
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