Splits in human blood.
It splits in all living things ,plants and animals not just humans because we only need the glucose wich is the fuel of life.Fructose isnt the fuel of life .
And sucrose splits easy into glucose and fructose with just a little acid ,its called invertase.
TSS its TDS actually,a measurement of electrical ressistance to guess the ammount of solids wich are conducting electricity.
Since fruits are mostly water ,the TDS is mainly from sugars.
TDS is correct and TSS is incorect because such measurement of density measures all the solids not only the sugars.There are salts and manny otther solids altough in verry small ammounts in the fruits.
Edit: measuring density with electrical devices does not work for sugars because they are non ionised.My mistake ,but still any density measurement for sugars wich is non electric should still be called TDS because its not just sugars that it measures.