Reducing Agents Decrease the Oxidative Burst and Improve Clinical Outcomes in COPD Patients: A Randomised Controlled Trial on the Effects of Sulphurous Thermal Water Inhalation

Table 1

Physical and chemical characteristics of sulphurous water and isotonic saline.

Parameters	Sulphurous water	Isotonic saline
pH	7.1	4.5–7.0
Ca2^+ g/L	0.251	Absent
Mg2^+ g/L	0.091	Absent
NH4^+ g/L	0.00075	Absent
HCO3^− g/L	0.523	Absent
SO4^− g/L	0.5	Absent
H2S g/L	3.83	Absent