Correction to: Measurement uncertainty: requirements set in the accreditation standards

Accreditation and Quality Assurance - Unfortunately, the references 12 and 13 were incorrectly published in the original publication. The correct references are:     

Data integrity: requirements set in the accreditation standards

Accreditation and Quality Assurance - The requirements for the competence of laboratories are described in two standards, namely ISO/IEC 17025 and ISO 15189. The former applies to all laboratories...     

Measurement uncertainty: requirements set in the accreditation standards

Accreditation and Quality Assurance - Measurement uncertainty is of high importance to all testing and calibration laboratories and those involved in sampling activities. Its evaluation requires...     

Kinetic analysis of transient permeation curves

The kinetic analysis of transient permeation curves on a systematic basis is suggested as a method for the study of non-ideal membrane—penetrant diffusion systems, analogous and complementary to the method of time-lag analysis which we have previously developed. Experimental data on N₂ or propane permeating through porous graphite pellets of varying non-homogeneity are reported and used for a preliminary application of these ideas. Previous work on early-time permeation kinetics is considerably extended here and late-time permeation kinetics is considered for the first time. The results obtained show that the proposed method promises to play an important role in the study of non-ideal diffusion systems, when an adequate theoretical background has been built up.