Protective Gloves: Permeation testing Reinhard Oppl John Hansen Eurofins Product Testing A/S

October 20111

www.eurofins.com/glove-testing

Protective Gloves:

Permeation testing

Reinhard Oppl

John Hansen

Eurofins Product Testing A/SDenmark, Germany, France, USA, China, …


October 20112


Eurofins Product Testing – Locations

Galten, Denmarknear Arhus

Eurofins Product Testing A/S

[email protected]

Other business areas: Tests of food, feed, pharmaceuticals, genetics, environment

Manchester (UK)

Galten (DK)

Paris (FR)Torino (IT)

Hamburg (D)

Shanghai (CN)

Bangkok (TH)

Hong Kong (HK)

Shenzhen (CN)

Des Moines (USA)

Reichenwalde (D)

Bangalore (IND)

Bratislava (SK)

Aix (FR)

Barneveld (NL)

October 20113


Test: Exposure of outer surface

Tightness against gases and liquids

(Penetration through seams, cracks and holes) EN 374-2, ASTM F903; visual evaluation (droplets, bubbles)

Infiltration on molecular level (Permeation) EN 374-3, ASTM F739, ISO 6529; Collection medium / analysis

Resistance (Degradation) ASTM D471-98, or similar to ISO 1817

Change of physical properties (e.g. tactile strength)

Ingredients test: Skin tolerance / allergies EN 455-3, latex proteins

EN 420, Chrome VI (leather gloves)

Protective gloves – chemicals

October 20114


Infiltration on molecular level (Permeation)

Procedure Absorption in outer layers

Diffusion; possibly through several layers

Release from inner surface

Parameter: Breakthrough time and permeation rate

Experience Small molecules permeate faster than larger ones

Solvents may carry with them other substances that else may break

through much later

Chemical similarity of membrane and chemical increases permeation

Larger thickness slows down breakthrough; thickness varies within a

glove; take sample from palm or from back?


October 20115


Nitrile does not equal Nitrile Latex, Nitrile, Neoprene: Huge differences in composition;

Nitrile glove can be 100% nitrile latex,

or it can be mainly natural latex with thin outer layer of nitrile latex

Mention a real product in Safety Data Sheet?

Conditions of use and of test Temperature (23 °C / 27 °C / 33°C) (huge effect)

Stretching (when moving fingers) (only small effect)

Duration of use and of test (splash protection / 8 hours / re-use next days)


October 20116


Analysis Continuous / discontinuous

Direct monitoring (FID, UV, pH, conductivity, …) or enrichment by

sampling

Collection medium: Air / water / solids

Not volatile, not soluble in water :

Collection disc is pressed tightly to inner side;

then desorption by solvent and GC or HPLC analysis


October 20117



Best

MAPA

ISO 6529


October 20118


Protective Gloves – Permeation


October 20119


Permeation testing since 1988

Test with adsorption discs: 1st laboratory in Europe firstly developed for epoxy coatings

Projects Improved Method for Testing of Protective Gloves

German Work Insurance and Prevention Services, 1999

Testing method for protective gloves for PAH at renovation work

German Federal Institute for Occupational Safety and Health, 2003

Risk assessment for occupational dermal exposure to chemicals

EU Commission, coordinated by TNO, 2004

Permeation testing - Eurofins

October 201110


Which chemical product or mixture? If possible – selection of representative products

Physical state – gas, liquid, viscous, solid, granulate?

Selection of gloves for testing? Safety versus wearing comfort and costs

Which manufacturer? Who buys the samples?

Questions on testing Duration / frequency of testing

Testing temperature (our recommendation: at 33 °C as "worst-case")

Selection of collection medium and detection / analysis

Calibration with product, or with clean substances?

Ideas of customer on extraction / analysis?

Questions before any test

Protective Gloves: Permeation testing Reinhard Oppl John Hansen Eurofins Product Testing A/S

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