Skip to main content
  • About ELGA
    • About ELGA
    • Ultrapure water
    • Purification Technologies
    • Impurities In Water
    • Guides & White Papers
    • Approved Partners
    • Sustainability
    • Reducing Clinical Risks
    • Careers
    • Events
    • HPLC in Pharma
    • HPLC Water Purity
  • Blog
    • Analytical Chemistry
    • Clinical & Pharma
    • Cool Science
    • Environment and sustainability
    • Life in the lab
    • Purelab product design
    • Science of the future
    • Water Purity
    • Water in the lab
  • Contact
  • Deutsch
  • Español
  • Français
  • Italiano
  • Português
  • 日本語
  • 中文
Home ELGA LabWater
  • Products
  • Applications
  • Case Studies
  • Support
  • Products
    • PURELAB
    • CENTRA
    • MEDICA
    • BIOPURE
    • ELGA Full Product Range
  • Applications
  • Case Studies
    • Unlocking the secrets of the Antarctic with the aid of ultrapure water
    • Abbott Diagnostics chooses ELGA MEDICA systems in South Asia
    • Ca’Foscari University- A New Method for Investigating Environmental Tracers in Ice
    • Ca’Foscari University- Investigating Contaminants in Antarctic Ice
    • DASA: The biggest medical diagnostics company in Brazil
    • ELGA helps immuneserology labs maximize uptime
    • Importance of ultrapure Type 1+ water for the development of generic medicines
    • MEDICA® Pro selected for Siemens ADVIA® analyzers at City General Hospital
    • Optimale Wasserqualität für mikrobiologische Forschung und Lehre
    • PURELAB® flex: an ideal training system for today's research method
    • Sichere Reinstwasserversorgung für präzise Produkttests
    • Zentrale Reinstwasser-Aufbereitung für Analyser
  • Support
    • Support & Services
    • Laboratory Planning
    • Register a Product
    • Register Your Product (USA & Canada Only)
  • Products
    • PURELAB
      • PURELAB Chorus 1 Complete
      • PURELAB® Chorus 1
      • PURELAB Chorus 2+
      • PURELAB® Chorus 2
      • PURELAB® Chorus 3
      • PURELAB® flex 1 & 2
      • PURELAB® flex 3 & 4
    • CENTRA
      • CENTRA® 60/120
      • CENTRA® RDS
      • CENTRA® R200
    • MEDICA
      • MEDICA® 7/15
      • MEDICA® EDI 15/30
      • MEDICA® Pro EDI 60/120
      • MEDICA® Pro-LPS
      • MEDICA® Pro-R and Pro-RE
      • MEDICA® R200
    • BIOPURE
      • BIOPURE 7/15
      • BIOPURE 60/120
      • BIOPURE 200/300/600
    • ELGA Full Product Range
      • PURELAB® Classic
  • Applications
  • Case Studies
    • Unlocking the secrets of the Antarctic with the aid of ultrapure water
    • Abbott Diagnostics chooses ELGA MEDICA systems in South Asia
    • Ca’Foscari University- A New Method for Investigating Environmental Tracers in Ice
    • Ca’Foscari University- Investigating Contaminants in Antarctic Ice
    • DASA: The biggest medical diagnostics company in Brazil
    • ELGA helps immuneserology labs maximize uptime
    • Importance of ultrapure Type 1+ water for the development of generic medicines
    • MEDICA® Pro selected for Siemens ADVIA® analyzers at City General Hospital
    • Optimale Wasserqualität für mikrobiologische Forschung und Lehre
    • PURELAB® flex: an ideal training system for today's research method
    • Sichere Reinstwasserversorgung für präzise Produkttests
    • Zentrale Reinstwasser-Aufbereitung für Analyser
  • Support
    • Support & Services
    • Laboratory Planning
    • Register a Product
    • Register Your Product (USA & Canada Only)
  • Deutsch
  • Español
  • Français
  • Italiano
  • Português
  • 日本語
  • 中文
  • Privacy policy
  • Terms & Conditions
  • Global Legal Compliance
  • Patents
  • Impressum

Let's talk about lab water

  • Categories
    • Analytical Chemistry
    • Clinical & Pharma
    • Cool Science
    • Environment & Sustainability
    • Future Science
    • Life in The Lab
    • PURELAB Product Design
    • Science of the Future
    • Water In The Lab
    • Water Purity
  • Authors
    • ELGA Editorial Team
    • Natasha Zarach
    • Dr Paul Whitehead
    • Dr Alison Halliday
    • John Walker
Clinical & Pharma
Water Purity

HPLC-UV dissolution testing using ELGA’s PURELAB® systems enhances therapeutic drug monitoring

23 Jan 2020
- by ELGA Editorial Team

Medical technology concept. Electronic medical record.

In the pharmaceutical industry, generic substitution has played an important role in limiting the cost of medicines in many countries.

However, some concerns have been raised regarding the testing of generic substitutes, particularly those that are narrow therapeutic index drugs (NTIDs), such as ciclosporin, a potent immunosuppressant. NTIDs are characterized by a small difference between their minimum effective concentration and their minimum toxic concentration in blood. This means that just a small increase in dose or in blood/serum concentration of NTIDs can lead to toxic effects in patients. 

Given the risks involved with ciclosporin generics, it is important to demonstrate that the branded drug and the substitute have comparable drug content and purity. A widely used technique for such therapeutic drug monitoring is high-performance liquid chromatography (HPLC), which is highly sensitive and specific. However, current HPLC methods are unable to detect whether unknown impurities have interfered with ciclosporin, calling into question the reliability and reproducibility of therapeutic monitoring of this drug. 

A recent study by Dr. Badr Aljohani and colleagues set out to develop, validate, and apply an improved HPLC method for detecting the active drug content and impurities in ciclosporin capsules.(1) The assay used dissolution testing, which involves rupturing the capsule in a medium (such as ultrapure water), and then measuring the dissolved contents via HPLC-UV mass spectrometry. Using ultrapure water was crucial to the success of this study to avoid any impurities interfering with the highly sensitive liquid chromatography method.(2) For this purpose, Aljohani’s team used the ELGA PURELAB Ultrapure water purification system to obtain deionized water as the dissolution medium.(3)

A HPLC-UV Method for Dissolution Testing

For over thirty years in the pharmaceutical industry, ciclosporin has been produced to prevent rejection after organ or tissue transplants, and to treat autoimmune disorders, such as Crohn’s disease and rheumatoid arthritis. However, treatment may be associated with several adverse drug reactions (ADRs), including convulsions, high blood pressure, kidney and liver dysfunction, and can lead to an increased risk of developing lymphoma. 

Aljohani’s laboratory aimed to analyze the active drug base and/or any impurities in ciclosporin capsules, which could result in ADRs in patients. The team analyzed the drug content of seven ciclosporin products, which were either brands or generics obtained from seven different countries (Columbia, Egypt, India, Jordan, Pakistan, Saudi Arabia, and Turkey). They used a dissolution test for ciclosporin obtained from US Pharmacopeia 2008, and HPLC-UV was used to separate, identify, and quantitate the components in the liquid samples.

The dissolution test involved rupturing and dissolving the ciclosporin capsules in 500 mL of HPLC-grade deionized water at a purity of 18.2 MO cm, obtained using an ELGA PURELAB® system. The conditions used by the researchers included a temperature of 37.5 ± 0.5°C, a 5 mL sample volume (filtered using 20 µm filters), and sampling times of 5, 10, 15, 30, 60, and 90 minutes to check for ciclosporin release from capsules.

Pressurized samples (2 mg/mL) of the standard ciclosporin solution were passed through a HPLC-UV system with a UV detection wavelength of 210 nm. Separation was carried out using a reversed phase C18 column, maintained at 50°C, and an injection volume of 20 µL. The analytes were eluted by isocratic elution at a flow rate of 0.7 mL/minute with acetonitrile and water (70:30%, v/v) and 0.03% v/v trifluoroacetic acid, over a 25-minute runtime. 

The Crucial Role of ELGA’s Water Purification Systems

Aljohani’s laboratory developed a simple, rapid, and sensitive HPLC method using dissolution testing to analyze the contents of ciclosporin, and to compare the drug content and purity of generics and brands. In this study, all of the capsules tested were found to contain one or more impurities, and the active drug base did not always match the labelled amount in both generics and brands. The authors noted that this could indicate that switching among and between branded and generic ciclosporin may potentially lead to undesirable effects in patients. However, this is based on only one study using ciclosporin products manufactured in just seven countries, so further work is needed to examine whether these results represent ciclosporin manufacture worldwide. 

Such crucial insights using highly sensitive HPLC-UV methods can only be obtained using ultrapure water. Ultrapure water not only avoids damage to expensive equipment but also prevents contamination of the sample medium to help ensure reliable results. The ELGA PURELAB Ultra system used in Aljohani et al.’s research not only offers laboratories the highest quality HPLC-grade water but is also easy to use. Applying such systems to drive forward cutting-edge research in the pharmaceutical industry could therefore reveal more insights to protect patients’ health.

If you’d like to find out more about why ultrapure water is vital for HPLC applications, why not download ELGA’s Water Essence of the Lab whitepaper?


References
[1] http://www.openaccessjournals.com/scholarly-articles/development-and-validation-of-a-hplcuv-method-for-dissolution-testing-of-ciclosporin-its-application-to-the-measurement-of-brand-a-jbb-1000354.pdf
[2] https://www.elgalabwater.com/applications/liquid-chromatography
[3] https://www.elgalabwater.com/products/purelab-ultra

 

Doctor looking at lab water

Not sure which ultrapure lab water system is right for you?

Click here to find out what product suits your needs

       PRoduct Selector

Highlights

18 Jan 2021
Forensic Toxicological Analysis Of Cannabinoids In Blood
14 Dec 2020
Developing Batteries Powered by Human Urine 
23 Nov 2020
Improving the Treatment of Diabetic Foot Infections
16 Nov 2020
Does The Type Of Wine Fermentation Vessel Matter?
9 Nov 2020
Investigating ‘DNA Vaccines’ to Prevent Hepatitis B Infection
12 Oct 2020
Printing Personalised Medical Cannabis Products
5 Oct 2020
Can Microscopic Needles Help Treat Skin Cancer?
21 Sep 2020
Turning Mushrooms into Versatile Materials

Categories

  • Analytical Chemistry
  • Clinical & Pharma
  • Cool Science
  • Environment & Sustainability
  • Future Science
  • Life in The Lab
  • PURELAB Product Design
  • Science of the Future
  • Water In The Lab
  • Water Purity

Video

  • Enquiry
  • Get a Quote
  • Book a Demo
  • Find an Approved Partner

Enquiry

Please check this to confirm that you have read our Terms of Service and Privacy Policy.

Get a Quote

Please check this to confirm that you have read our Terms of Service and Privacy Policy.

Book a Demo

Please check this to confirm that you have read our Terms of Service and Privacy Policy.

Call us

Can't find what you are looking for?

Support Number
+44 (0)20 3567 7300
United Kingdom Sales
+44 (0)1628 879 704
United States of America Sales
+1 877-315-3542
France Sales
+33 1 40 83 65 00
China Sales
+86 400-616-8882

 

ELGA LabWater Head Quarters

Lane End Business Park
Lane End, High Wycombe
HP14 3BY
United Kingdom
T: +44 (0) 203 567 7300
F: +44 (0) 203 567 7205

The Ultrapure Water Specialists

  • Support & Services
  • Events

Case Studies

  • Abbott Diagnostics
  • DASA Medical Diagnostics
  • NeoDIN Medical Institute
  • North Staffordshire NHS Trust
  • Olsberg Vocational College

Resources

  • Learn About Ultrapure Water
  • Guides and White Papers
  • Purification Technologies
  • Applications
  • Impurities In Water

Blogs

  • Latest Blog
  • Water Purity - Different Types of Pure Water
  • What is Clinical Laboratory Reagent Water (CLSI)?
  • What is Total Organic Carbon (TOC)?
  • Language
    • Deutsch
    • English
    • Español
    • Français
    • Italiano
    • Português
    • 日本語
    • 中文
  • Other Veolia Sites
    • Veolia
    • Veolia Fondation
    • Veolia Water Technologies

© VWS (UK) Ltd. trading as ELGA LabWater. 2021 - All rights reserved.
ELGA is the global laboratory water brand name of Veolia.

  • Privacy policy
  • Terms & Conditions
  • Global Legal Compliance
  • Patents
  • Impressum
Elga Veolia
TOP

© 2017 ELGA Veolia