Mass fraction assignment of Bisphenol-A high purity material
Authors: Westwood Steven , Martos Gustavo , Josephs Ralf , Choteau Tiphaine , Wielgosz Robert , Davies Stephen , Moawad Michael , Tarrant Greg , Chan Benjamin , Alamgir Mahiuddin , Rego Eliane de , Wollinger Wagner , Garrido Bruno , Fernandes Jane , Sena Rodrigo de , Oliveira Rodrigo , Melanson Jeremy , Bates Jennifer , Le Phuong Mai , Meija Juris , Quan Can , Huang Ting , Zhang Wei , Ma Ruian , Zhang Shaofeng , Hao Yuan , He Yaiuan , Song Shanjun , Wang Haifeng , Su Fuhai , Zhang Tianji , Li Hongmei , Lam Wai-hing , Wong Wai-fun , Fung Wai-hong , Philipp Rosemarie , Dorgerloh Ute , Meyer Klas , Piechotta Christian , Riedel Juliane , Westphalen Tanja , Giannikopoulou P , Alexopoulos Ch , Kakoulides E , Kitamaki Yuko , Yamazaki Taichi , Shimizu Yoshitaka , Kuroe Miho , Numata Masahiko , Pérez-Castorena Alejanro , Balderas-Escamilla Miryan , Garcia-Escalante Judith , Krylov Anatoliy , Mikheeva Alena , Beliakov Mikhail , Palagina Marina , Tkachenko Irina , Spirin Sergey , Smirnov Vadim , Lin Teo Tang , Sze Cheow Pui , Juan Wang , Lingkai Wong , Ting Lu , Qinde Liu , Yizhao Chen , Peng Sim Lay , Fernandes-Whaley Maria , Prevoo-Franzsen Des , Quinn Laura , Nhlapo Nontete , Mkhize Dennis , Marajh Dominique , Chamane Sabelo , Ahn Seonghee , Choi Kiwhan , Lee Sunyoung , Han Jeesoo , Baek Song-Yee , Kim Byungjoo , Marbumrung Sornkrit , Jongmesuk Pornnipa , Shearman Kittiya , Boonyakong Cheerapa , Bilsel Mine , Gündüz Simay , Ün Ilker , Yilmaz Hasibe , Bilsel Gökhan , Gökçen Taner , Clarkson Cailean , Warren John , Achtar Eli 
Published: June 2021

Main text
The CCQM-K148.a comparison was coordinated by the BIPM on behalf of the CCQM Organic Analysis Working Group for NMIs and DIs which provide measurement services in organic analysis under the CIPM MRA. It was undertaken as a "Track A" comparison within the OAWG strategic plan. CCQM-K148.a demonstrates capabilities for assigning the mass fraction content of a solid organic compound having moderate molecular complexity, where the compound has a molar mass in the range (75 - 500) g/mol and is non-polar (pKow < −2), when present as the primary organic component in a neat organic solid and where the mass fraction content of the primary component in the material is in excess of 950 mg/g.
Participants were required to report the mass fraction of Bisphenol A present in one supplied unit of the comparison material. Participants using a mass balance method for the assignment were also required to report their assignments of the impurity components present in the material. Methods used by the seventeen participating NMIs or DIs were predominantly based on either stand-alone mass balance (summation of impurities) or qNMR approaches, or the combination of data obtained using both methods. The results obtained using thermal methods based on freezing-point depression methods were also reported by a limited number of participants. There was excellent agreement between assignments obtained using all three approaches to assign the BPA content.
The assignment of the values for the mass fraction content of BPA consistent with the KCRV was achieved by most of the comparison participants with an associated relative standard uncertainty in the assigned value in the range (0.1 - 0.5)%.
To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.
The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).