Boron

Crystalline boron does not react with boiling hydrochloric acid, HCl, or boiling hydrofluoric acid, HF. Powdered boron oxidizes slowly when treated with concentrated nitric acid, HNO₃.

Boron does not react with air at room temperature. At higher temperatures, boron reacts with oxygen, forming boron(III)oxide, B₂O₃.

4 B(s) + 3 O₂(g) 2 B₂O₃(s)

Boron reacts with the halogens fluorine, chlorine and bromine, forming the respective boron(III)trihalides.

2 B(s) + 3 F₂(g) 2 BF₃(g)
2 B(s) + 3 Cl₂(g) 2 BCl₃(l)
2 B(s) + 3 Br₂(g) 2 BF₃(l)

Boron does not react with water under normal conditions.

Method 4500-B D Inductively Coupled Plasma Method [1]. A portion of the sample is digested in a combination of acids. The digest is aspirated into an 8,000 K argon plasma where resulting light emission is quantified for 30 elements simultaneously.

Method limit of detection in water = 0.05 mg/L
Method limit of detection in soil = 1.00 mg/kg