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The development of new process designs, the validation of mathematical models, and intelligent control strategies for production depend enormously on the correctness of the analyzed monomer fractions. Most of the available detection methods focus on the determination of the monomer fractions of the homopolymer poly(3-hydroxybutyrate). Only a few can analyze the monomer content in copolymers such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate), which usually require expensive measuring devices, a high preparation time or the use of environmentally harmful halogenated solvents such as chloroform or dichloromethane. This work presents a fast, simple, and inexpensive method for the analysis of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with high-performance liquid chromatography. Samples from a bioreactor experiment for the production of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with <jats:italic>Cupriavidus necator<\/jats:italic> H16 were examined regarding their monomer content using the new method and gas chromatography analysis, one of the most frequently used methods in literature. The results from our new method were validated using gas chromatography measurements and show excellent agreement.<\/jats:p><jats:p><jats:bold>Key points<\/jats:bold><\/jats:p><jats:p>\u2219 <jats:italic>The presented HPLC method is an inexpensive, fast and environmentally friendly alternative to existing methods for quantification of monomeric composition of PHBV.<\/jats:italic><\/jats:p><jats:p>\u2219 <jats:italic>Validation with state of the art GC measurement exhibits excellent agreement over a broad range of PHBV monomer fractions.<\/jats:italic><\/jats:p>","DOI":"10.1007\/s00253-021-11265-3","type":"journal-article","created":{"date-parts":[[2021,5,20]],"date-time":"2021-05-20T08:22:44Z","timestamp":1621498964000},"page":"4743-4749","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Fast, inexpensive, and reliable HPLC method to determine monomer fractions in poly(3-hydroxybutyrate-co-3-hydroxyvalerate)"],"prefix":"10.1007","volume":"105","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7829-5190","authenticated-orcid":false,"given":"Stefanie","family":"Duvigneau","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander","family":"Kettner","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa","family":"Carius","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carola","family":"Griehl","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rolf","family":"Findeisen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Achim","family":"Kienle","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,5,20]]},"reference":[{"key":"11265_CR1","doi-asserted-by":"publisher","first-page":"397","DOI":"10.1016\/j.ijbiomac.2016.03.002","volume":"87","author":"A Aramvash","year":"2016","unstructured":"Aramvash A, Hajizadeh-Turchi S, Moazzeni-Zavareh F, Gholami-Banadkuki N, Malek-Sabet N, Akbari-Shahabi Z (2016) Effective enhancement of hydroxyvalerate content of PHBV in Cupriavidus necator and its characterization. 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