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Quality Control

Quality Control

Quality control is one of the three cyclical quality assurance activities that help keep a system under statistical control. Typical quality control activities include creating quality control charts, conducting proficiency testing, and documenting and archiving results.
Quality control helps track data, visualize trends, and identify variations, making it easier to detect deviations that may affect the accuracy of an analysis. One way to do this is by generating a quality control chart, which...

Quality Assurance

Quality Assurance

Quality assurance is the overarching term used to describe the activities employed to ensure the proper performance of a system. These activities can be classified into three categories: quality control, quality assessment, and internal corrective measures. Typically, these activities work cyclically: quality control is performed before and during the analysis, while quality assessment occurs during and after the investigation. Internal corrective measures are implemented based on the findings...

Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Air-entraining Agents

Air-entraining Agents

Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...

Pulse amplitude and quality

Pulse amplitude and quality

Pulse amplitude is a crucial indicator of cardiac health because it provides valuable insights into the strength of left ventricular contractions and the overall uniformity of blood circulation within the vasculature. The strength of the pulse is directly related to the force with which the heart contracts and the volume of blood being pumped.
A weak or absent pulse may indicate reduced cardiac output or poor left ventricular contraction, which can be signs of cardiovascular dysfunction or...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...

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Related Experiment Video

Updated: Feb 5, 2026

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry

Published on: June 14, 2018

Indoor Air Quality.

Joseph M Seguel^1,2, Richard Merrill^1,2, Dana Seguel^1,2

¹St. Peter's Hospital, Albany, New York (JMS, DS).

American Journal of Lifestyle Medicine

|September 12, 2018

Summary

Indoor air pollution poses significant respiratory health risks, with pollutant levels potentially 100 times higher than outdoors. Healthcare providers must assess indoor environmental exposures for accurate patient diagnosis and improved outcomes.

Keywords:

indoor air quality mold radon secondhand smoking

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Last Updated: Feb 5, 2026

Analyzing the Photo-oxidation of 2-propanol at Indoor Air Level Concentrations Using Field Asymmetric Ion Mobility Spectrometry

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Published on: June 14, 2018

Preparation of High-Quality Fermented Fish Product

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Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA

Collection and Extraction of Occupational Air Samples for Analysis of Fungal DNA

Published on: May 2, 2018

Area of Science:

Environmental Health
Respiratory Medicine
Public Health

Background:

Outdoor air quality is widely recognized for its health impact, yet indoor air pollution's detrimental effects are often overlooked.
Indoor air pollutants can reach levels up to 100 times higher than outdoor pollutants, ranking among the top environmental health risks.
A strong correlation exists between air quality and respiratory health, necessitating thorough environmental exposure histories.

Purpose of the Study:

To highlight the significant impact of indoor air quality on respiratory health.
To educate healthcare providers on common indoor air pollutants and their associated health risks.
To emphasize the importance of identifying indoor environmental exposures for patient care.

Main Methods:

Review of common indoor air pollutants and their effects on the respiratory system.
Discussion of specific agents including secondhand smoke, radon, carbon monoxide, nitrogen dioxide, formaldehyde, cleaning agents, mold, dander, and dust mites.
Emphasis on the role of healthcare providers in obtaining environmental exposure histories.

Main Results:

Indoor air pollution presents a major environmental risk to public health.
Numerous common household agents can lead to hazardous exposures affecting the respiratory system.
Health issues from poor indoor air quality may manifest years after exposure onset.

Conclusions:

Healthcare providers need to be aware of indoor air pollution's risks to effectively manage patient respiratory conditions.
Recognizing and addressing indoor environmental exposures is crucial for improving patient outcomes.
Long-term health consequences underscore the importance of proactive indoor air quality assessment.