Proficiency Tests
Download protocol
About the analytes
Arsenic
Arsenic is a metal wich is naturally occurring element(As1), the toxicity of arsenic is highly dependen on the oxidation state and chemical form (As2, As3).
From the different exposure pathways of arsenic, the main intake are consumption of water and food (different pathways and quantities) (As4).
Not only acute toxicity could be a problem, since specific arsenic species, in a relatively wide time-range can also lead to cardiovascular disease, neurological diseases and cancers (As4, As5, As6, As7).
For this reason it is particularly important that the different arsenic species are quantified and it is well know the distribution, toxicity, health problems, metabolism and transformation for the safety of the environment and animals, humans included.( As1)
Why participate in a proficiency test?
There are many reasons to schedule these quality controls, the participation in international proficiency tests helps laboratories detect improvements and ensure the results are reliable.
As of today, one of the main goals for any laboratory is increase its client’s trust in their analysis procedure and results obtained, checking that equipment, personel, solvents and all the steps and parts involved in the analysis are working as intented, providing trustworthy and realiable results.
As a laboratory its is now more important than ever to be able to obtain results with precision and accuracy to help your clients commercialice products safe for the end-user.
The continuous participation in proficiency tests can help you detect bias and check if any change or improvement made as an effect on the results obtained.
TestQual proficiency tests are a great and reliable service to help you check your results against laboratories from all around the world, helping you detect any deviation to correct it and ensure your clients continuous quality controls and improvements are being monitored by participating and checking your results against other laboratories.
Accreditation and standards
·Standars in which this proficiency test is based:
·UNE-EN ISO/IEC 17043:2010 General requirements for proficiency testing
Check our scope of accreditation here.
·UNE-EN ISO/IEC 15328:2015 Statistical methods for use in proficiency testing by interlaboratory comparison
· HARMONIZED PROTOCOL FOR THE PROFICIENCY TESTING OF (CHEMICAL) ANALYTICAL LABORATORIES
Why proficiency tests with TestQual?
·20 years since our foundation in 2003
·International participants partake in our proficiency test.
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TestQual: our compromise is to allow you to check the quality of your results. |
·Transparency: Results from spiking and quality controls (homogeneity, stability) available for any participant that requests it.
·Expanding network of distributors to give a better client service, using local language and within your time zone. If your country still does not have a distributor, please, contact us, we can still accept your order.
·We take care of all aspects of the shipping, so you can focus on the analysis.
· We are available at any time and any direct consult to TestQual has an inferior response time of 24h (working days).
·We do not publish beforehand the price of shipping because we are constantly negotiating with providers and couriers to improve and adjust our prices. However, if you need a closed price in the quote and need to know the shipping costs, please, let us know and we will include it.
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All of this with the goal of offering you the best service and all your expectations and needs are completely satisfied. |
Summary of the proficiency test
All the information about this PT can be found in the protocol, which can be downloaded from a link located in the right column of this page.
This proficiency test will consist in a single round with a single sample, the amount of sample to be distributed can be found in the protocol of this PT. If needed and justified, more amount of sample can be requested to the coordinator of the PT. Additional charges might apply.
The range of concentration for the target analytes of this proficiency test will be: Approximately between 20 and 300 μg/kg.
The target standard deviation for the analytes can be checked in the protocol.
For this PT the parameters to be analyzed are:
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Inorganic arsenic |
Sum of As(III) and As(V) |
PT Scheduled calendar
Check the right column of this page, in the “Dates” section.
*These dates are orientative and always will have to be checked in the protocol of the PT and the news in our webpage. Only participants inscribed in the proficiency test will receive the sample instructions/recommendations and the definitive date for the distribution of samples.
Accreditation, international standards and bibliography
·Standars in which this proficiency test is based/accredited:
·UNE-EN ISO/IEC 17043:2010 General requirements for proficiency testing
Check our scope of accreditation here.
·UNE-EN ISO/IEC 15328:2015 Statistical methods for use in proficiency testing by interlaboratory comparison
· HARMONIZED PROTOCOL FOR THE PROFICIENCY TESTING OF (CHEMICAL) ANALYTICAL LABORATORIES
Bilbliography/Bibliografía:
As1: M.S. Reid, K.S. Hoy, J.R.M. Schofield, J.S. Uppal, Y. Lin, X. Lu, H. Peng, X.C. Le, Arsenic speciation analysis: A review with an emphasis on chromatographic separations, Trends in Analytical Chemistry, https://doi.org/10.1016/j.foodchem.2021.129706
As2 M. Styblo, L.M. Del Razo, L. Vega, D.R. Germolec, E.L. LeCluyse, G.A. Hamilton, W. Reed, C. Wang, W.R. Cullen, D.J. Thomas, Comparative toxicity of trivalent and pentavalent inorganic and methylated arsenicals in rat and human cells. Arch. Toxicol. 74 (2000) 289-299.
As3: F. Ebert, L. Leffers, T. Weber, S. Berndt, A. Mangerich, S. Beneke, A. Burkle, T. Schwerdtle, Toxicological properties of the thiolated inorganic arsenic and arsenosugar metabolite thio-dimethylarsinic acid in human bladder cells. J. Trace Elements Med. Biol. 28 (2014) 138-146
As4 C.J. Chen, C.W. Chen, M.M. Wu, T.L. Kuo, Cancer potential in liver, lung, bladder and kidney due to ingested inorganic arsenic in drinking-water, Br. J. Cancer. 66 (1992) 888- 892
As5: J.E. Heck, A.S. Andrew, T. Onega, J.R. Rigas, B.P. Jackson, M.R. Karagas, E.J. Duell, Lung cancer in a U.S. population with low to moderate arsenic exposure, Environ. Health Perspect. 117 (2009) 1718–1723.
As6 T.J. Wade, Y. Xia, J. Mumford, K. Wu, X.C. Le, E. Sams, W.E. Sanders, Case control study of cardiovascular disease and arsenic exposure in Inner Mongolia, China, Environ. Health. 14 (2015) 35.
As7 S.M. Cohen, A. Chowdhury, L.L. Arnold, Inorganic arsenic: A non-genotoxic carcinogen, J. Environ. Sci. 123 (2016) 305-332.
https://food.ec.europa.eu/safety/chemical-safety/contaminants/catalogue/arsenic_en
https://efsa.onlinelibrary.wiley.com/doi/epdf/10.2903/j.efsa.2009.1351
How to apply and get your laboratory code
Those laboratories that want to participate and are not registered on our website can register through this link: START REGISTRATION
If your laboratory is already registered on our website you can start your application by clicking the link situated at the top or bottom of this page, in PARTICIPATE, once you have logged in you will have to enter your Limit of Quantification (LOQ) for the parameters that have to be studied. The analytes with LOQ equal to NA (NOT ANALYSED) will NOT appear in the website when submitting the results of the PT.
Once the application has been sent, as soon as possible (usually 24h) you will receive an email with your laboratory code for the participation in the PT.
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If your application is accepted and a laboratory code is granted, our compromise is that the proficiency test will be useful. |
Contact us
If you have any doubt, if you want to get a quote or if we can help you in any other way, we are looking forward to helping you:
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Email: |
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Office phone: |
0034-868-94-94-86 |
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Mobile phone: Whatsapp available |
0034-676-367-555 |
