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Method Adjustment vs Change Part 6: Interactions

This technical article discusses the possible effect caused from interactions between changes from different variables.
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Written byJohn Dolan
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This technical article discusses the possible effect caused from interactions between changes from different variables.

In this instalment of the series we look at allowed adjustments to HPLC methods. In the previous instalments (Part 1, Part 2, Part 3, Part 4, Part 5), we’ve looked at each of the specific variables listed in Table 1.

Interactions
The allowed adjustment of the variables listed in Table 1 are each listed separately, but a change in some of these can have a cascading influence on other variables. Let’s consider a change in packing particle size as an example.

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Meet the Author(s):

  • John Dolan

    John Dolan is considered to be one of the world’s top experts in HPLC. He has written more than 300 user-oriented articles on HPLC troubleshooting over the last 30 years, in addition to more than 100 peer-reviewed technical articles on HPLC and related techniques. His three books (co-authored with Lloyd Snyder), Troubleshooting HPLC Systems, Introduction to Modern Liquid Chromatography (3rd edn), and High-Performance Gradient Elution, are standard references on thousands of desks around the world. He has taught HPLC training classes around the world to more than 10,000 students.

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