This is the original sentence, Please see that

"Stain the slides with 3 % Giemsa solution diluted and prepared

with 1/100 mol/L sodium phosphate buffer (pH 6.8) for 30 min"

Another question is, how can I make 0.001 citric acid ? This is the original sentence

"Rinse the slides with 0.001 % citric acid solution"

Thanks.