Buffer SoIiilio7is 417 



0.2M Phosphate Buffer (gomori) {pH 5.9-7.7) 



STOCK solutions: 



monobasic sodium phosphate: 27.6 gm. made up to 1000 ml. with dis- 

 tilled water 

 dibasic sodium phosphate: 53.6 gm. made up to 1000 ml. with dis- 

 tilled water 

 For desired pH mix correct amounts as indicated beloAv: 



pH monobasic sodium phosphate dibasic sodium phosphate 



Phosphate Buffer (sorensen) (pH 5.29-8.04) 



STOCK solutions: 



M/15 dibasic sodium phosphate: 9.465 gm. made up to 1000 ml. with 



distilled water 

 M/i5 potassium acid phosphate: 9.07 gm. made up to 1000 ml. with 

 distilled water 

 For desired pH mix correct amounts as indicated below: (Some tech- 

 nics will require dilution up to 1000 ml.) 



