Methods of testing bitumen and related roadmaking products Calculation of non-aqueous volatiles content (by difference)
Edition 1996

Milk - Determination of urea content - Enzymatic method using difference in pH (Reference method) (ISO 14637:2004)
Edition 2007-06-06

Solid recovered fuels - Report on relative difference between biodegradable and biogenic fractions of SRF
Edition 2009-09-29

Leather - Chemical tests - Determination of pH and difference figure (ISO 4045:2018)
Edition 2019-03-27

Coil coated metals - Test methods - Part 3: Colour difference and metamerism - Instrumental comparison
Edition 2022-06-08

Leather - Determination of pH value and difference figure
Edition 2020-04-28

Printed electronics. Materials. Conductive ink. Measurement of difference in resistance of printing direction of conductive film fabricated with wire-shaped materials
Edition 2024-03-19

Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz. General requirements for using the finite-difference time-domain (FDTD) method for SAR calculations
Edition 2020-01-16

IEC/IEEE International Standard - Determining the peak spatial-average specific absorption rate (SAR) in the human body from wireless communications devices, 30 MHz to 6 GHz - Part 1: General requirements for using the finite-difference time-domain (FDTD) method for SAR calculations
Edition 2017

BS EN IEC 62899-202-8. Printed electronics. Part 202-8. Materials. Conductive film. Measurement for difference in resistance with printing direction of conductive film fabricated with wire shaped materials
Edition 2021-12-17