327 IAC 7.1-2-30
327 IAC 7.1-2-30 "pH" defined
Cite as Ind. Admin. Code tit. 327, r. 7.1-2-30
Sec. 30. "pH" means the logarithm of the reciprocal of hydrogen ion concentration measured at twenty-five (25) degrees Centigrade
(seventy-seven (77) degrees Fahrenheit) or measured at another temperature and then converted to an equivalent value at twenty-five (25) degrees
Centigrade (seventy-seven (77) degrees Fahrenheit).