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Last update: December 2014

26. Ring trial Identification of molds in indoor and food 2014
Organiser: Landesgesundheitsamt Baden-Württemberg (State Health Office Baden-Württemberg)
Parameters: Pure cultures: Epicoccum nigrum, Trichothecium roseum, Penicillium griseofulvum, Stachybotrys echinata, Rhizopus stolonifer, Talaromyces piceus
Notes: Successful
Measurement uncertainty evaluated

Ring trial biowaste LÜRV-A 2014
Organiser: Landesbetrieb Hessisches Landeslabor (State Company Hessian laboratory)
Parameters: Salmonellae
Methods: BioAbfV § 3
Notes: Successful
Measurement uncertainty evaluated

Potable Water II-2014
Organiser: Niedersächsisches Landesgesundheitsamt
(Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
Clostridium perfringens
Methods: Colilert
TrinwV 2001 (2011)
DIN EN ISO 7899-2
Notes: Successful
Measurement uncertainty evaluated

Potable Water I-2014
Organiser: Niedersächsisches Landesgesundheitsamt
(Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
Legionella spec.
Pseudomonas aeruginosa
Methods: Colilert
TrinwV 2001 (2011)
DIN EN ISO 7899-2
ISO 11731 / DIN EN ISO 11731-2
DIN EN ISO 16266
Notes: Successful
Measurement uncertainty evaluated

Ring trial: 4-field test 2013-3
Organiser: VAH (Association for Applied Hygiene)
Parameters: test organisms: Staphylococcus aureus, Enterococcus hirae, Candida albicans (ATCC 15442)
application time: 15 minutes
concentrations: 0,025%; 1%
clean conditions
Methods: prEN16615:2013

Ring trial: 4-field test 2013-2
Organiser: VAH (Association for Applied Hygiene)
Parameters: test organism: Pseudomonas aeruginosa (ATCC 15442)
application time: 15 minutes
concentrations: 0,025%; 1%
clean conditions
Methods: prEN16615:2013

25. Ring trial Identification of molds in indoor and food 2013
Organiser: Landesgesundheitsamt Baden-Württemberg (State Health Office Baden-Württemberg)
Parameters: Pure cultures: Talaromyces funiculosus, Geomyces pannorum, Geotrichum candidum, Aspergillus westerdijkiae, Penicillium nalgiovense, Aspergillus glaucus
Notes: Successful
Measurement uncertainty evaluated

24. Ring trial Identification of molds in indoor and food 2013
Organiser: Landesgesundheitsamt Baden-Württemberg (State Health Office Baden-Württemberg)
Parameters: Pure cultures: Aspergillus carbonarius, Penicillium brevicompactum, Cladosporum sphaerospermum, Zygorhynchus moelleri, Phialophora europaea, Acrostalagmus luteoalbus
Notes: not Successful (3 of 6) - corrective action determined
Measurement uncertainty evaluated

Ring trial biowaste LÜRV-A 2013
Organiser: Landesbetrieb Hessisches Landeslabor (State Company Hessian laboratory)
Parameters: Salmonellae
Methods: BioAbfV § 3
Notes: Successful
Measurement uncertainty evaluated

Potable Water III-2013
Organiser: Niedersächsisches Landesgesundheitsamt
(Lower Saxony State Health Department)
Aurich Branch
Parameters: colony count (20 °C, 36 °C)
Legionella spec.
Methods: TrinwV 2001 (2011)
ISO 11731 / DIN EN ISO 11731-2
Notes: Successful
Measurement uncertainty evaluated

Potable Water II-2013
Organiser: Niedersächsisches Landesgesundheitsamt
(Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
Clostridium perfringens
Methods: Colilert
TrinwV 2001 (2011)
DIN EN ISO 7899-2
Notes: Successful
Measurement uncertainty evaluated

Potable Water I-2013
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
Legionella spec.
Pseudomonas aeruginosa
Methods: Colilert®
TrinkwV 2001 (2011)
DIN EN ISO 7899-2
ISO 11731 / DIN EN ISO 11731-2
DIN EN ISO 16266
Notes: Successful except colony count 20 °C - corrective action determined
Measurement uncertainty evaluated

Potable Water III-2012
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Intestinal enterococci
Methods: DIN EN ISO 7899-2
Notes: Successful
Measurement uncertainty evaluated

Ring trial biowaste LÜRV-A-2012
Organiser: Staatliche Betriebsgesellschaft für Umwelt und Landwirtschaft (Operating State Society for Environment and Agriculture) Leipzig
Parameters: Salmonellae
Methods: BioAbfV § 3
Notes: Successful
Measurement uncertainty evaluated

Potable Water II-2012
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
C. perfringens
Methods: Colilert®
TrinkwV 2001 (2011)
DIN EN ISO 7899-2
TrinkwV 2001 (2011), Anl.5
Notes: Successful
Measurement uncertainty evaluated

Potable Water I-2012
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Legionella
Methods: DIN EN ISO 9308-1
TrinkwV 2001 (2011)
DIN EN ISO 7899-2
EN ISO 16266
BGBl. 11-2000, S.911 ff.
Notes: Successful except intestinal enterococci - corrective action determined
Measurement uncertainty evaluated

Ring trial: Quantitative carrier test (phase 2, stage 2) 2011
Organiser: Dr. Brill + Partnerinternal laboratory comparison test
Parameters: Test organisms: Staphylococcus aureus; Pseudomonas aeruginosa
Test substance: glutaraldehyde
Application times: 15 und 60 minutes
5 concentrations: (0,0125%; 0,025%; 0,05%; 0,1%; 0,2%)
high organic load
Methods: EN 14561: 2006

Ring trial: Quantitative carrier test for the evaluation of bactericidal activity on non-porous surfaces without mechanical action 2011

Organiser: DVG (German Veterinary Society)
Parameters: Test organisms: Staphylococcus aureus
Test substance: glutaraldehyde
2 application times
each 4 concentrations
organic load: 0,5% albumin, 0,5% yeast extract
Methods: DVG-Guidelines for the testing of chemical disinfectants and disinfection procedures (4th Edition)

Ring trial: Quantitative carrier test (phase 2, stage 2) 2011

Organiser: VAH (Association for Applied Hygiene)
Parameters: Test organisms: Staphylococcus aureus
Test substance: glutaraldehyde
Application time: 60 minutes
3 concentrations: (0,005%; 0,0075%; 0,01%)
low organic load
Methods: EN 14561: 2006

Ring trial: Organic waste / sludge 2011
Organiser: LGC Standards
Parameters: Escherichia coli
Salmonellae
Methods: BioAbfV § 3 par. 4 with Annex 2
Notes: Successful
Measurement uncertainty evaluated

Potable Water III-2011
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Legionella
Methods: BGBl. 11-2000, S.911 ff.
Notes: Successful
Measurement uncertainty evaluated

Across borders ring trial - Subject Module: waste,
area: biowaste
Organiser: Landwirtschaftliches Technologiezentrum (Agricultural Technology Centre) Augustenberg
Parameters: Salmonellae
Methods: BioAbfV § 3 Par. 4 with Annex 2
Notes: Successful
Measurement uncertainty evaluated

Potable Water II-2011
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
C. perfringens
Methods: Colilert®
TrinkwV 1990
DIN EN ISO 7899-2
TrinkwV 2001, Anl.5 Nr. 1
Notes: Successful
Measurement uncertainty evaluated

Potable Water I-2011
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Legionella
Methods: DIN EN ISO 9308-1
TrinkwV 1990
DIN EN ISO 7899-2
EN ISO 16266
BGBl. 11-2000, S.911 ff.
Notes: Successful except Legionella - corrective action determined
Measurement uncertainty evaluated

Ring trial: Quantitative suspension test 08/10

Organiser: VAH (Association for Applied Hygiene)
Parameters: Test organisms: Staphylococcus aureus
Test substance: glutaraldehyde
Application time: 60 minutes
4 concentrations: (0.01%; 0.015%; 0.02%; 0.04%)
low organic load
Methods: DGHM 2001, method 9
prEN 13727rev (2009-09)

Ring trial: Potable Water IV-2010
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Methods: Colilert®
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 16266
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water II-2010
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Clostridium perfringens
Methods: TrinkwV (drinking water ordinance) 2001 annexure 5 No. 1
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Biological Waste/Sludge 2010
Organiser: LGC Standards
Parameters: Escherichia coli
Salmonellae
Methods: BioAbfV (biological waste ordinance) §3 par.4 with annexure 2
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water I-2010
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Legionella in 100ml
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 16266
BGBl. (German Law Gazette) 11-2000, p. 911 ff.
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water IV-2009
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Methods: Colilert®
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 16266
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water
Organiser: LGC Standards
Parameters: Enterococci
Colony count (20 °C, 36 °C)
Methods: TrinkwV (drinking water ordinance) 1990
EN ISO 7899-2
Notes: Successful
Evaluation of internal measure error by ring trial

Ring trial: Biological Waste/Sludge 2009
Organiser: LGC Standards
Parameters: Escherichia coli
Salmonellae
Methods: BioAbfV (biological waste ordinance) §3 par.4 with annexure 2
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water I-2009
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Legionella in 1ml
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 16266
BGBl. (German Law Gazette) 11-2000, p. 911 ff.
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water IV-2008
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Legionella in 1ml
Legionella in 100ml
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 12780
BGBl. (German Law Gazette) 11-2000, p. 911 ff.
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Quantitative suspension test 06/2008

Organiser: VAH (Association for Applied Hygiene)
Parameters: S. aureus
C. albicans
Methods: DGHM 2001, method 9 (VAH-modified)
Scrutiny of neutralisation

Ring trial: Potable Water II-2008
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
C. perfringens
Methods: Colilert®
TrinkwV (drinking water ordinance) 2001, annexure 5 No. 1
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water 03/2008
Organiser: LGC Standards
Parameters: P. aeruginosa
Methods: TrinkwV (drinking water ordinance) 2001, annexure 5 No. 1
EN ISO 12780
Notes: Successful
Evaluation of internal measure error by ring trial

Ring trial: Biological Waste/Sludge 2008
Organiser: LGC Standards
Parameters: Escherichia coli
Salmonellae
Methods: BioAbfV (biological waste ordinance) §3 par.4 with annexure 2
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water I-2008
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: Coliform bacteria
E. coli
Colony count (20 °C, 36 °C)
Intestinal enterococci
P. aeroginosa
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 6222
EN ISO 12780
Notes: Successful
Measurement uncertainty evaluated

Comparative study: Potable Water 01/2008
Organiser: HN internal
Parameters: total Colony count (20 °C, 36 °C)
Methods: Agar plate method according to previous TrinkwV (drinking water ordinance)
Notes: Internal measurement uncertainty evaluated

Quality in water analysis scheme 10/2007
Organiser: LGC Standards (Oxoid)
Parameters: Clostridium perfingens
P. aeroginosa
Methods: BioabfVO
Notes: Successful
Measurement uncertainty evaluated

Comparative study: Potable Water 10/2007
Organiser: HN internal
Parameters: Total Colony count (20 °C, 36 °C)
Methods: -
Notes: individual measurement uncertainty evaluated

Ring trial: Potable Water IV-2007
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform bacteria
Intestinal enterococci
Colony count (20 °C, 36 °C)
P. aeroginosa
Legionella in 1ml
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
EN ISO 12780
BGBl. (German Law Gazette) 11-2000, p. 911 ff
Notes: Successful except intestinal enterococci - corrective action determined
Measurement uncertainty evaluated

Quality in water analysis scheme 07/2007
Organiser: LGC Proficiency Testing Group
Parameters: Clostridium perfingens
P. aeroginosa
Methods: -
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Potable Water I-2007
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform germs
Intestinal enterococci
Colony count (20 °C, 36 °C)
P. aeroginosa
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
DIN EN 12780
Notes: Successful except P. aeroginosa - corrective action determined
Measurement uncertainty evaluated

Revision P. aeruginosa succeeded in May 2007

Ring trial: Potable Water II-2006
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform germs
Intestinal enterococci
Colony count (20 °C, 36 °C)
P. aeroginosa
Legionella
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
DIN EN 12780
Notes: Successful
Measurement uncertainty evaluated

Biological Waste 2006
Organiser: Quality Management Limited
Parameters: E. coli
Salmonellae
Methods: BioAbfV (biological waste ordinance) §3 par.4 with annexure 2
Notes: Successful
Evaluation measurement uncertainty impossible

Ring trial: Potable Water I-2006
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli
Coliform germs
Intestinal enterococci
Colony count (20 °C, 36 °C)
P. aeroginosa
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990
DIN EN 12780
Notes: Successful
Measurement uncertainty evaluated

Comparative study
Organiser: HN internal
Parameters: Colony count (20, 36 °C)
Methods: -
Notes: Individual measurement uncertainty evaluated

Ring trial: Potable Water IV-2005
Organiser: Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli/Coliform germs
enterococci
Colony count
P. aeroginosa
Legionella
Intestinal enterococci
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990, annexure 1 No. 5
DIN EN 12780
BGBl. (German Law Gazette) 11-2000, p. 911 ff
Notes: Successful
Measurement uncertainty evaluated

Ring trial: Legionella Okt/2005
Organiser: Oxoid
Parameters: Legionella species
E. coli
Methods: -
Notes: Measurement uncertainty evaluated

Part proficiency testing Biological Waste/Compost
Organiser: Sächsisches Landesanstalt für Landwirtschaft (Saxony State Institute of Agriculture)
Parameters: Salmonellae
Methods: BioAbfV (biological waste ordinance) §3 par.4 with annexure 2
Notes: Successful

Ring trial: Legionella February 2005
Organiser: Oxoid
Parameters: Legionella species
Methods: -
Notes: Measurement uncertainty evaluated

Ring trial: Potable Water I-2005
Organiser:    Niedersächsisches Landesgesundheitsamt (Lower Saxony State Health Department)
Aurich Branch
Parameters: E. coli/Coliform germs
enterococci
Colony count (20, 36 °C)
P. aeroginosa
Methods: DIN EN ISO 9308-1
DIN EN ISO 7899-2
TrinkwV (drinking water ordinance) 1990, annexure 1 No. 5
DIN EN 12780
Notes: Successful
Measurement uncertainty evaluated