dvr Alkalinity Test Reagent TK – 7

Add 1-2 drops of  RXSOL TK7 and mix with the stirring rod , If  sample turns red / PINK ( which indicates presence of p-Alkalinity ) then follows 3rd step otherwise if sample remains colourless ( Record p-Alkalinity = 0 ) 

Note: This article uses material from the http://rxmarine.com/