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An isocratic method of 15 min on a Rezex ROA-Organic Acid H+ (8%) column (Phenomenex—part number 00F-0138-K0 + SecurityGuard Cartridge Kit (KJ0-4282) + SecurityGuard Cartridges Carbo-H 4 × 3.0 mm ID ...

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Erupting volcanoes can be a significant natural source of sulfur dioxide emissions. When sulfur dioxide combines with water and air, it forms sulfuric acid, which is the main component of acid rain.

After 30 min, the absorbance was read at 760 nm on a spectrophotometer. The TPC values were calculated on the basis of a calibration curve prepared using a gallic acid standard (2.5, 5.0, 7.5, 10.0, ...

Reuters identified five chemical companies ... provides oleum – also known as fuming sulphuric acid – used in the Tambov, Kazan, and Perm powder plants. The Lukoil refinery in Perm provided ...

The structure is the main link between Brazil's Tocantins and Maranhao states. There were fears the Tocantins River could have been contaminated with sulfuric acid being transported by two trucks ...

The structure is the main link between Brazil's Tocantins and Maranhao states. There were fears the Tocantins River could have been contaminated with sulfuric acid being transported by two trucks that ...

Authorities in Brazil on Thursday said the risk of acid pollution from a bridge collapse ... bridge when it collapsed last Sunday. The structure is the main link between Brazil's Tocantins and ...