Analysis methods for quality control analysis in wood treatment plants have evolved with the changes in treatment preservative chemistries and analytical instrument technology. The basic hydrometer specific gravity measurements used for solution strength and classic wet chemistry methods for wood have given way to instrumental techniques such as X-ray fluorescence, automatic titrator, and HPLC. Not all of methods involve complex instrumentation, simple turbidimeters and handheld refractometers can be used for rapid solution strength testing. These newer methods are discussed in the paper as well as the increased importance of inspection and auditing of the treatment plants production by the chemical suppliers and third party inspection agencies.

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