Determination of Boron Content in Treated Wood Using an Azomethine-H Spectrophotometric

Abstract

Boron compounds are leached quantitatively from the treated wood (wood treated by boric acid) using
three different methods; heat extraction, refluxing and wet digestion methods. The extracted sample
was analyzed using Azomethine-H spectrophotometric method. The absorbance at wavelength 411 nm
was measured 30-40 minutes after the addition of the Azomethine-H reagent. A linear calibration
graph for the sample extract using direct heat, reflux and wet digest method was obtained between 1-
10 ppm with the R2 = 0.9992. The selectivity, accuracy, within and between precision, limit of
detection and quantification, and stability were examined as parts of the method validation. Recovery
was determined after spiking with a typical range of analyte.