Special reagents are required for use with some ion selective electrodes. For more information on ionic strength adjusters and special reagents, refer to the ion selective electrode user guide.

All ionic strength adjusters and special reagents are packaged as a one 475 mL (1 pint) bottle, except Cat. No. 941709 is packaged as two 475 mL bottles, Cat. No. 941609 is packaged as four 475 mL bottles, Cat. No. 940909 is packaged as a one 1 gallon bottle and Cat. No. 940999 is packaged as four 1 gallon bottles.