FOR the analysis of the nitrate content of sea water, and for certain tests on alkaloids, it is necessary to have sulphuric acid free from all but the most minute amounts of nitric acid.

This process occurs when sulfuric acid, often generated from the oxidation of hydrogen sulfide gas, dissolves carbonate rocks, leading to the creation of extensive cave networks. Recent research ...

[SMM Analysis: December Sulphuric Acid Exports Hit a New High for the Year, What Are the Reasons?] According to data from the General Administration of Customs, China exported a total of 519,700 mt of ...

Three bottles of sulfuric acid, acetone and a "white substance labeled potassium nitrate" can be seen in one of the documents, which also mention a "burner with white residue," a thermometer ...

Programa de Pós-Graduação em Engenharia Florestal (PPGEF), Departamento de Engenharia e Tecnologia Florestal, Universidade Federal do Paraná, 632 Pref. Lothario Meissner Avenue, Curitiba 80210-170, ...

The enchanting dunescape stretches over 43 miles (70 km) along the coast and over 30 miles (50 km) inland. Lençois translates ...

For the reactions agitated by the orbital shaker, 100 g of RCA was treated with 150–700 mL of acid for 24–72 h. The acid types were 99% acetic acid, 3 M sulfuric acid, and 0.5–3 M HCl acid ... mill ...

Discussion: Our study links weathering characteristics with chemical properties and bacterial community changes of weathered products ... Available phosphorus (AP) was determined via the sodium ...