Our Profile

Quality Services International GmbH –
a Tentamus company

As an accredited laboratory, which is equipped with state-of-the-art laboratory equipment, as well as experienced, continuously trained specialists, QSI can provide a comprehensive range of analyses for foodstuff which is focused, among other products, on honey, coffee, tea and herbal drugs and pharmaceutical raw material according to Pharmacopoeia.

Our GMP-certificate also allows us to perform GMP analysis of medicinal cannabis and other pharmaceutical products. Thus, we are your partner for production, trade and export when it comes to product safety, hygiene and quality control.

In addition to physico-chemical tests, our more than 60 years of expertise also includes sensory tests by trained panels, declaration tests, consulting* as well as training and audits.

Thanks to our unique full-service group of companies under the umbrella of the Tentamus Group, we are able to offer complete analytics and innovative solutions for national and international requirements of external quality control – even for special requests.

Accreditation & Authorisation


Quality Services International GmbH is accredited by the German Accreditation Body (DAkkS) according to DIN EN ISO/IEC 17025:2018.

Sehen Sie hier die accreditation certificate
Certificate registration number: D-PL-14508-01-00
See here the Annex for accreditation

As we are flexibly accredited, accreditation may also include matrices and methods other than those mentioned in individual cases.
These can be taken from the master list and requested by e-mail ( or by phone (0421/596 067 0).



Manufaturer’s authorisation

Admission of Qualified person (QP) according to § 65 Abs. 4 AMG for the examination of official counter samples or duplicate samples – Preparation of test certificates according to the pharmacy operating regulations §§ 6 and 11


Authorisations as experts for the examination of official cross-check:

Admission as official Expert Dr. C. Lüllmann
Appointment as commercial chemist Dr. C. Lüllmann
Admission as official Expert J. Wehlitz
Admission as official Expert A. Wessels (nee Hoffmann)
Admission as official Expert M. Linkogel
Admission as official Expert Dr. J. Lütjohann
Admission as official Expert M. Weigel
Admission as official Expert I. Tipke


Memberships and cooperation

QSI is an active member of the following associations and working groups: Honig-Verband, Deutscher Tee & Kräuter Verband, Deutscher Kaffeeverband, BPC, BvCW, BLL, Lebensmittelverband, GDCh/LChG, NaGeB, DIN Kommitee: Honey, coffee, tea, AOAC International, F.E.E.D.M., International Honey Commission, NHPDA.


Our History

  • 1954

    Foundation of the Institute for Honey Research by Dr. Herwarth Duisberg

  • 1989

    Dr. Cord Lüllmann takes over the management of the institute and founds the Institute for Trade Analysis (CTL)

  • 1996

    Foundation of the Institute for Pharmaceutical Analysis by Dr. Cord Lüllmann

  • 1999/2000

    Foundation of Quality Services International GmbH / Accreditation of the laboratory according to ISO 17025

  • 2013

    Joining the Tentamus Group

  • 2017

    Launch of cannabis analytics

Today, QSI is also involved in EU-funded projects worldwide aimed at improving the quality of end-consumer products.

By joining the constantly growing Tentamus Group of laboratories in 2013, QSI was able to further increase its analytical services and can cover an ever-increasing portfolio of products and analyses within the group.

By combining many years of experience and commitment, we ensure the two foundations of our quality policy: maintaining the resilience of our laboratory results in the context of daily routine examinations and our passion for analytical innovations. This is ensured not least by our motivated employees, who are qualified through internal and external training courses.

Our Management

Dr. Cord Lüllmann

Managing Director
Luellmann Cord


Martin Linkogel

Business Manager Bee Products

Certified Food Chemist

Dr. Jens Lütjohann

Scientific Laboratory Director
Business Manager Medical Devices
Jens Lütjohan

Certified Food Chemist

We Value Your Privacy
We use cookies on our website. Some of them are essential, while others help us to analyze how this website is being used and to allow you to contact us through our website, i.e. use the chat widget. You can change your decision at any time.
We Value Your Privacy
We use these technologies to analyze how this website is being used.
Name Google Analytics, Google Tag Manager
Provider Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland
Purpose Cookie by Google used for website analytics. Generates statistical data on how the visitor uses the website.
Privacy Policy https://policies.google.com/privacy
Cookie Name _ga, _gat, _gid
Cookie Expiry 2 years
Customer Interaction
These technologies will allow you to contact us through our website, i.e. use the chat widget.
Name LiveChat
Provider LiveChat Software S.A., ul. Zwycięska 47, 53-033 Wroclaw, Poland
Purpose Communication with clients via online chat using the API of the chat service LiveChat.
Privacy Policy https://www.livechat.com/legal/privacy-policy/
Cookie Name __lc_cid, __lc_cst
Cookie Expiry 2 years
Technologies required to enable the core functionality of this website.
Name Cookie Consent
Provider Owner of this website, Imprint
Purpose Saves the visitors preferences selected in the cookie banner.
Cookie Name ws_cookie_consent
Cookie Expiry 1 year