Determination of Available Boron in Soil by Electric Furnace Preboiling-Boiling Water Extraction-Inductively Coupled Plasma Optical Emission Spectrometry

By adopting the preboiling strategy with an electric furnace, the time required to reach and maintain a gentle boil was significantly shortened, which significantly improved the efficiency of large-scale sample analysis.

Furthermore, replacing the traditionally expensive quartz triangular flasks with PTFE beakers not only greatly reduced the experimental costs but also simplified the operational procedures. The results showed that available boron exhibited a good linear relationship in the concentration range of 0~1.0 mg/L, with a correlation coefficient (R) of 0.999 9. The method detection limit was 0.000 9 mg/L, the relative error (RE) ranged from –3.80% to –2.57%, and the relative standard deviation (RSD) was between 4.99% and 6.63%.