I am wondering if anyone has come across calibration curve and uncertainty for PM2.5, SO2, O3, and NO2 monitors maintained and operated by the CPCB?
Please share link herein for the same if you are aware.
Best regards,
Prashant
You should contact them directly. As a regulatory body, they are required to provide the standards to which they want you held! They may be the same standards as those used in the USA (EPA) or the UK, but I would check before getting them from either of those sources.
https://www.epa.gov/system/files/documents/2024-02/pm-naaqs-monitoring-fact-sheet.pdf
Article On the absolute calibration of SO 2 cameras
https://www3.epa.gov/ttnamti1/files/ambient/pm25/spec/so2sum2.pdf
Thanks Steven. Some of the docs on CPCB website indicate that they are doing qa qc checks routinely but some of the fine details are not available publicly for further use.
Fundamentally, the validity or use of the results is just the error/uncertainty of the calibration curve. They should be publishing that - at least the nominal specification - with each "qa/qc" check that is done. Saying you are doing a "check" without supporting evidence is worthless. Generally, the manufacturers of any equipment used will usually be happy to share their accuracy values (even if optimistic).
To access documents containing calibration curves and uncertainty data for PM2.5, SO2, O3, and NO2 monitors as regulated by the Central Pollution Control Board (CPCB) of India, you can follow these steps:
1. CPCB Official Website
The Central Pollution Control Board's official website often contains guidelines, reports, and technical documents related to air quality monitoring. Here's how you can navigate their site:
- Visit the CPCB Website: Go to CPCB's official website.
- Search for Relevant Documents: Use the search bar or navigate through sections like 'Publications', 'Reports', and 'Guidelines'.
- Technical Reports and Guidelines: Look for technical reports and guidelines that might contain calibration curves and uncertainty information. These documents are typically found under the 'Air Quality' section.
2. Contact CPCB Directly
If you cannot find the specific documents on their website, you can contact CPCB directly:
- Email: Send an email to the CPCB (you can find contact details on their website under 'Contact Us').
- Phone: Call their office for direct assistance.
- Request for Information: Formally request the specific documents you need, mentioning calibration curves and uncertainties for PM2.5, SO2, O3, and NO2 monitors.
3. Research Publications and Journals
Many calibration and uncertainty studies are published in scientific journals. You can search for these publications through academic databases such as:
- Google Scholar: Use search terms like "CPCB calibration curve PM2.5", "CPCB SO2 monitor uncertainty", etc.
- ResearchGate: Access papers and publications from researchers who might have worked on relevant studies.
- PubMed and IEEE Xplore: These databases also contain environmental and engineering research articles.
4. National Air Quality Monitoring Program (NAMP) Reports
The NAMP, under the CPCB, releases periodic reports which might include detailed calibration and uncertainty data for air quality monitors:
- NAMP Reports: These reports can be found on the CPCB website under 'Air Quality Monitoring' or similar sections.
- Annual and Quarterly Reports: Look for specific sections that discuss the methodologies used for calibration and data quality.
5. Environmental Standards and Guidelines
Refer to the environmental standards and guidelines set by CPCB, which might include calibration protocols:
- Environmental Standards: These documents are typically listed under the 'Standards' section of the CPCB website.
- Technical Manuals: Manuals and guidelines for monitoring equipment often contain calibration and uncertainty details.
Example Searches on CPCB Website
Specific Documents and Sections
- Air Quality Monitoring Guidelines: These guidelines often contain detailed methodologies.
- Technical Reports on Air Quality: Look for technical documentation specific to each pollutant (PM2.5, SO2, O3, NO2).
By exploring these resources and contacting CPCB directly if necessary, you should be able to access the required calibration curves and uncertainty data for the specified air quality monitors.
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