Validationofmeasurementmethodshasbeenusedforavery ciated measurement uncertainty? The answer must be: no. longtimeinchemistry. Itismostlybasedontheexamination Therecanneverbeamechanismorrecipeforproducing - of a measurement procedure for its characteristics such as tomatically valid results because one can never eliminate precision, accuracy, selectivity, sensitivity, repeatability, re- theskills,theroleandtheresponsibilityoftheanalyst. producibility,detectionlimit,quanti?cationlimitandmore. ISO 9000:2000, item 3. 8. 5 de?nes validation as con?r- When focussing on quality comparability and reliability mation by examination and provision of objective evidence in chemical measurement, the ?elds of interest to this Jour- that the requirements for an intended use are ful?lled . The nal, one stumbles into various interpretations of the term revised edition of the VIM ( VIM3 ), is likely to ?ne-tune validation. It is one more example of a term which is used thisde?nitionoftheconcept validation tobe con?rmation sometimes very consistently, sometimes very loosely or in- through examination of a given item and provision of - deed ambiguously. Since the term is very common in the jective evidence that it ful?lls the requirements for a stated chemical community, it is important that its meaning be intendeduse . nd clear. Turning to the 2 edition of the International Vo- Lookingatsimplepractice, manypeoplearelookingfor cabulary of Basic and General terms in Metrology (VIM) aformaldecisionthatagivenmeasurementmethod automat- (1993), surprisingly we do not ?nd a de?nition. Webster s ically gives them valid i. e. reliable results. One wonders Dictionary of the English language (1992) tells us that val- what this has to do with stated intended use . Reliab- idation is making or being made valid . Obviously valida- ity clearly is a property of a measurement result.

Bioanalytical method validation and its implications for forensic and clinical toxicology - A review

Validation of a computer program for atomic absorption analysis
Instrumental validation in capillary electrophoresis and checkpoints for method validation
Qualification and validation of software and computer systems in laboratories
Clinical reference materials for the validation of the performance of photometric systems used for clinical analyses
Measurement uncertainty and its implications for collaborative study method validation and method performance parameters
Qualification and validation of software and computer systems in laboratories
Qualification and validation of software and computer systems in laboratories
Qualification and validation of software and computer systems in laboratories
Analytical validation in practice at a quality control laboratory in the Japanese pharmaceutical industry
Validation of the uncertainty evaluation for the determination of metals in solid samples by atomic spectrometry
Validation requirements for chemical methods in quantitative analysis - horses for courses?
Validation criteria for developing ion-selective membrane electrodes for analysis of pharmaceuticals
Is the estimation of measurement uncertainty a viable alternative to validation?
Validation of an HPLC method for the determination of p-dichlorobenzene and naphthalene in mothrepellents
The evaluation of measurement uncertainty from method validation studies
The evaluation of measurement uncertainty from method validation studies
Automated ion-selective measurement of lithium in serum. A practical approach to result-level verification in a two-way method validation
Determination of hydrocarbons in water - interlaboratory methodvalidation before routine monitoring
Interlaboratory quality audit program for potable water - assessment of method validation done on inductively coupled plasma atomic emission spectrometer (ICP-AES)
A need for clearer terminology and guidance in the role of reference materials in method development and validation
Validation of salt spray corrosion test
Method validation and reference materials
Method validation of modern analytical techniques
Validation of test methods
Marketing Valid Analytical Measurement
Analytical procedure in terms of measurement (quality) assurance
Flexibilization of the scope of accreditation: an important asset for food and water microbiology laboratories
Different approaches to legal requirements on validation of test methods for official control of foodstuffs and of veterinary drug residues and element contaminants in the EC
Methods validation: AOAC's three validation systems
Observing validation, uncertainty determination and traceability in developing Nordtest test methods.