Laboratory respiratory protection: how can respiratory filtration be matched to the contaminants present?

In the laboratory, respiratory protection is a vital element of risk control strategies. Fine dusts, biological aerosols, vapours and gases: each exposure calls for an appropriate solution: disposable filtering facepieces FFP2/FFP3 compliant with EN 149, reusable half masks or full-face masks (EN 140/EN 136) with particulate or gas filters, or powered air-purifying respirators (PAPR). Sound selection is based on hazard assessment, calculation of the protection factor, fit testing, maintenance, wear time, and compatibility with goggles, face shields and other PPE.

What are the different types of respiratory protective equipment (RPE) and how do you choose the right one?

• Disposable respirators (FFP): filtering half masks EN 149 (FFP2/FFP3) protect against solid/liquid particulates (dusts, biological aerosols). Lightweight and practical, ideal for short tasks or repetitive procedures. Note: a surgical mask is not respiratory PPE; it protects the process or the patient from contaminants emitted by the wearer.

• Reusable respirators: half mask (EN 140) or full face mask (EN 136) with P1/P2/P3 particulate filters and gas/vapour filters type A (organic), B (inorganic), E (SO?), K (ammonia), or combination filters (e.g. A2P3). Superior face seal, cost-effective over time, clearer speech and silicone comfort.

• Powered air (PAPR): motorised systems providing a filtered airflow. Reduce breathing resistance; recommended for prolonged wear, high particulate loading, or sensitive users.

• Fit testing & maintenance: fit is critical. It is advisable to carry out a fit test—qualitative (saccharin/Bitrex) or quantitative (particle counter)—at initial issue and at least annually. Inspect, clean, store dry; replace filters according to saturation, time in use and manufacturer’s instructions.

Selection criteria: nature of the hazard (particles vs gases), concentration vs Workplace Exposure Limits (WELs), required APF, duration of wear, compatibility with spectacles/face shields, presence of facial hair (not recommended), cleaning/decontamination, environmental footprint (reusables = less waste).

Type	Principle	Applications
Disposable FFP2/FFP3	Integrated filtration (EN 149)	Bioaerosols, fine powders, short tasks
Half/full face mask	P + gas filters (EN 143/14387)	Solvents, acids, particulates; routine use
PAPR	Motorised filtered airflow	Prolonged wear, high protection level, minimised breathing effort.

In which areas is respiratory protective equipment (RPE) used in the laboratory?

• Life sciences: microbiology, virology, cell culture – control biological aerosols with FFP2/FFP3 or PAPR in high-containment areas.
• Pharma/biotech: weighing APIs, cytotoxics, lyophilised products – prioritise P3; full-face masks to limit eye exposure; PAPR for long campaigns.
• Chemistry: organic vapours (A), acids (E), ammonia (K) and particulates – combine A2P3 and BEK filters according to the hazards.
• Food industry: enzymes, powdered flavours, cereal dust – FFP2/FFP3 or a P3 half mask.
• Environment: field sampling, metals, spores – enhanced particulate protection.
• Cosmetics: pigments, fragrances, solvents – gas filters + P3.
• Quality control & maintenance: cleaning, decontamination, short-duration tasks where FFP is appropriate.
The choice should align with the prevention plan (COSHH risk assessment, WELs, APF) and user training.

The different types of respiratory protective equipment (RPE) available

Frequently asked questions about respiratory protection in the laboratory

What’s the difference between a surgical mask and FFP2/FFP3 ?

The surgical mask protects the wearer’s surroundings. An FFP respirator is PPE that protects the wearer against particles, as per EN 149.

How do I choose the right filter ?

Particles: P1/P2/P3. Gases/vapours: A/B/E/K by chemical family. Combine if needed (e.g. A2P3) and follow the manufacturer’s use limits.

How often should a fit test be done ?

At assignment, then at least annually, and after any change of model, size, facial shape, or accessories that could affect the seal.

Beards and a good seal — compatible ?

No. Hair under the sealing surface degrades the fit. Favour a clean-shaven face or a positive-pressure hooded PAPR.

When should you prefer a PAPR ?

For extended wear, high particulate loads, users intolerant to breathing resistance, or when enhanced spectacle/face-shield compatibility is required.

What’s a filter’s service life ?

It varies: particulate loading, gas breakthrough, and conditions of use. Follow the indicator/instructions, date the opening, and store airtight and protected from moisture.

Usable in low-oxygen atmospheres ?

No. Filtering devices do not supply oxygen. In O? deficiency or unknown toxics, only a self-contained breathing apparatus (SCBA) or supplied-air set is appropriate.

Compatible with safety spectacles ?

Yes, if the mask is correctly fitted. Full-face masks and visor-type PAPR units offer more clearance and reduce fogging.