If a person takes out a 100 Riyal note and intends that 80 Riyals of it be for Zakat al-Fitr and the…

If a person takes out a 100 Riyal note and intends that 80 Riyals of it be for Zakat al-Fitr and the remaining amount as a recommended charity, does this count as separation (for Zakat)? If this does not constitute separation and the time for paying Zakat al-Fitr has passed, and the person gives it to the poor, is their obligation fulfilled, or must they give another amount with the intention of general closeness to Allah, either as a current payment or as a delayed one?