The original nitric oxide probe - ideal for cell cultures, cell suspensions and many other applications
is a popular, robust and high performance sensor encased within a 2 mm diameter disposable stainless steel protective sleeve. The tip of the sleeve is covered with a NO-selective membrane. Replacement membrane sleeves can be purchased separately (WPI #5436
) and require an internal electrolyte (WPI #7325
A simple change in experimental protocol enables the ISO-NOP to be conveniently used for indirect rapid accurate determination of nitrite (NO–2) and nitrate (NO–3) concentration in samples. Using this method a detection limit for NO–2 or NO–3 as low as 1 nM is routinely possible.