Determination of Available Boron in Soil by ICP-OES with Hot Water Bath Extraction

BACKGROUND: At present, the main methods of soil available boron analysis are spectrophotometry and inductively coupled plasma-optical emission spectrometry（ICP-OES）. The spectrophotometric method has a long process, cumbersome operation, low analysis efficiency and easy environmental pollution, high requirements on the experience of the analyst, and unstable measurement results. The existing ICP-OES method has shortcomings such as long extraction time and high extraction temperature. It has low efficiency in analyzing large quantities of samples, wastes electrical energy and has the risk of scalding during operation. OBJECTIVES: In order to improve the ICP-OES method with water bath extraction for determination of available boron in soil.METHODS: The polyethylene stoppered plastic bottle was used instead of a quartz conical flask and a reflux device. Ultrapure hot water was added as the extractant. After leaching in a hot water bath, the ICP-OES method was used to determine the available boron content. RESUL