PAC L.P.
ROTTERDAM, NETHERLANDS / May 22, 2026
On May 4, 1981, a bold vision for the future of chromatography became reality. That day, innovator Han Spaans founded AC Analytical Controls B.V. His work would help redefine hydrocarbon analysis for decades to come.
Prior to founding AC, Han Spaans served as R&D Manager at Packard Becker B.V., a Dutch manufacturer of gas chromatographs. During his tenure, he played a direct and instrumental role in developing the first multidimensional gas chromatography (GC) systems. This work included early PNA (Paraffins, Naphthenes, Aromatics) methodologies. These advances laid the technical groundwork for what would become a defining moment in petroleum analysis.
In the early 1980s, a major oil company posed a significant industry challenge. The goal was to extend traditional PNA / PINA analysis to full PIONA characterization. Working directly with this customer, Han Spaans helped create the world’s first PIONA analyzer. This breakthrough led to the establishment of AC Analytical Controls B.V. From its very beginning, AC built its business on close collaboration with industry leaders. It also committed to solving real analytical problems through innovation.
Now, 45 years later, that founding spirit remains at the core of AC Analytical Controls. The company continues to develop advanced analytical systems such as the Reformulyzer®. It also offers a broad portfolio of specialized chromatography solutions for today’s most demanding applications.
Defining Standards in Specialty Chromatography Since 1981
AC-built GC analyzers have earned wide trust and adoption throughout the industry. Flagship applications include:
- Reformulyzer®
A proven gas chromatography (GC) solution that incorporates multiple international standard test methods in a single, integrated platform. - SIMDIS with SimDis XLNC Reporting
A comprehensive suite for detailed boiling point distribution analysis across complex matrices. It includes High Temperature SIMDIS, DHA-SIMDIS Crude Oil software with merge principle, and CNS SIMDIS for Crude Oil. - Hi-Speed RGA with RGA/NGA XLNC Reporting
A high-speed analyzer that determines and reports refinery gas composition within minutes. This speed supports rapid operational decisions. - DHA Combi Systems
A unique analytical approach that accommodates both light petroleum streams and light ends in crude oil. Both run within a single system architecture.
Across the entire portfolio, PAC Powered by AC analyzers meet the rigorous requirements of globally approved testing applications. They also align with standards from ASTM, CEN, DIN, ISO, and other international standardization organizations.
A Legacy of Innovation
Earlier this month, PAC Powered by AC employees gathered at the Rotterdam facility to celebrate this 45-year milestone. Together, they reflected on the company’s remarkable journey. The celebration also included a special moment to honor founder Han Spaans and his lasting impact on the chromatography industry.
Han’s family joined the event and presented the team with a framed drawing of AC’s original office and production site. Han first began building the GC analyzer business at this Schipluiden location. The gift now holds a special place within the Rotterdam facility. It serves as a reminder of the company’s origins, its entrepreneurial spirit, and Han’s enduring vision.
For 45 years, AC Analytical Controls® has stood at the intersection of scientific rigor, practical application, and customer-driven innovation. What began as a response to a single analytical challenge has grown into a global legacy of trusted solutions. These solutions continue to shape how the world analyzes hydrocarbons.
As a proud PAC brand, AC Analytical Controls B.V. now looks ahead to advancing the next generation of chromatography. In doing so, it continues the mission that began in 1981: turning analytical complexity into clarity, confidence, and control.
