Formol Titration for YAN, using formaldehyde, can now be recommended with the availability of formaldehyde neutralizing pads or materials!

The things you need are Formaldehyde, and the neutralizers for it:

Source of Formaldehyde

Presque Isle Wine Cellars
Formaldehyde (Formaline), 37% liquid, Lab grade, 16 oz. bottle

Source for Formaldehyde Neutralizing Mats, pads or sheets

Newcomer Supply
FAN PAD Size: 8″ x 11″
Volume: 25 pads/pk Order No: ABFAN-811