Pioneering separation scientist and beloved University of Minnesota mentor Peter W. Carr – whose work helped shape modern liquid chromatography – died on December 20, 2025, in Minnesota. He was 81.
Carr spent nearly five decades on the University of Minnesota-Twin Cities faculty, where colleagues remember him as both an innovative analytical chemist and a candid, career-defining mentor.
It started with Sputnik (and Mr. Wizard)
Carr was born in Brooklyn, New York, on August 16, 1944. In an article by the University of Minnesota upon the occasion of his retirement in 2024, Carr traced his scientific trajectory to the launch of Sputnik in 1957 (as a high-school freshman) and the Saturday-morning TV show Watch Mr. Wizard.
He entered the Polytechnic Institute of Brooklyn in 1961, studying in a department shaped by polymer chemistry and guided by electroanalytical chemist Louis Meites. He pursued graduate studies at Penn State under Joseph Jordan, then completed postdoctoral work in analytical biochemistry at Stanford University Medical School with David Glick in the Department of Pathology.
Carr’s first faculty appointment came in 1969 at the University of Georgia. Despite having little prior experience with separations, he began teaching a graduate-level course in chromatography. Here, Carr discovered a passion for the field.
Building a separation-science hub in Minnesota
Carr joined the University of Minnesota in 1977. Soon after arriving, he convened leading chromatographers from the Twin Cities – including researchers from academia and industry (UMN, 3M, General Mills, Pillsbury, and others) – to launch the Minnesota Chromatography Forum, serving as its first president.
His own research portfolio at Minnesota spanned electrochemistry, ion-selective electrodes, thermochemistry, immobilized enzymes, and chromatography. But his most widely associated advances came in liquid chromatography
Among Carr’s signature contributions was his work on zirconia and its role as an ultra-stable support for HPLC stationary phases. Inspiration came in part through years consulting with 3M (1979–1990), followed by extensive development with his group and collaborators.
That line of work translated into real-world tools: 15 of his 20 patents were related to zirconia, and the success of those technologies helped lead to the creation of ZirChrom Separations, Inc. in 1995. Carr later stepped away from the business side, but the impact of zirconia-based selectivity – and the idea that a stationary phase could be engineered to survive conditions that cripple silica – became part of the broader separation-science toolkit.
“Pete was an excellent and innovative analytical chemist,” says Christy Haynes, head of chemistry at Minnesota. “He thought about how to increase the practical utility of separations, working on new stationary phases (zirconia) and hyphenated methods to learn more while doing a separation and to do it faster.”
“He was also in many ways a classic New Yorker – especially in his direct way of giving people feedback,” she adds. “Sometimes these direct communication strategies were a bit surprising to the University of Minnesota folks with more even-tempered ‘Midwest’ sensibilities, but his feedback was always honest and intended to help everyone be more effective or operate at a higher level.”
Recognition, in research and in the classroom
Carr received many of the field’s major honors, including the American Chemical Society Award in Analytical Chemistry (2009), the A.J.P. Martin Gold Medal (2010), the LCGC Lifetime Achievement Award (2013), and the J. Calvin Giddings Award for Excellence in Education (2013). Carr was also recognized in the Mentor category of The Analytical Scientist’s Power List in 2017, and again in 2023 – the latter recognizing the achievements of analytical scientists over the preceding decade. He was also listed in “Who’s Who in America” in 2004.
At Minnesota, he was named a Distinguished University Teaching Professor (2002) for contributions to graduate and professional education.
“As an instructor, he was well-known for his graduate-level separations class, which he taught out of an unpublished text book that he wrote (and many people begged him to publish so that it could be used more broadly),” says Haynes. “It is not uncommon for department alumni, especially those who pursued a career in the chemical industry, to say that Pete's class, while very difficult, was the most useful class they took and the notes that they are most likely to look back on.”
Carr mentored more than 100 graduate students and postdoctoral researchers, many of whom returned to campus in summer 2025 for a belated 80th birthday symposium.
“Pete went above-and-beyond in terms of mentoring and advising graduate students for professional preparation, including offering in-department events focused on preparing a CV, proposals, or for an interview,” says Haynes. “He was a true champion for his mentees – many of those mentees cite Pete as being a critical determinant of their success, both personally and professionally.”
When asked about his most successful collaboration in 2017, Carr cited his work with Alon McCormick of the University of Minnesota’s Department of Chemical Engineering: “without his collaboration and vast insight we would not have gotten very far in the development of porous zirconia as a substrate for HPLC,” he said. But he also wanted to “acknowledge the contributions of and thank the truly outstanding students and associates who worked with me. These too were true collaborations.”
“His biggest impact is through the people that he trained and mentored, and I think that's what he wanted his impact to be,” says Haynes. “This was so apparent when many of his alumni flew back to Minnesota last summer for a belated 80th birthday symposium. The hours of Pete stories were heart-warming and funny.”
Carr is survived by his wife, Mary, and his children Sean, Erin, and Kelly, as well as extended family; he was preceded in death by his first wife, Leah.
Newsletters
Receive the latest analytical science news, personalities, education, and career development – weekly to your inbox.
