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Nanosecond Fluorescence Lifetime Standards

We offer a range of nanosecond fluorescence lifetime standards with excitation and emission wavelengths from the UV to Visible spectral region.

Standard tau / ns Solvent Ex / nm Em / nm
 p-Terphenyl  1.06  EtOH  295 350
 PPD  1.25  EtOH  282 350
 POPOP  1.29  EtOH  295 400
2-Aminpurine  12.0  Water  295 380
Fluorescein  4.04  Water, pH10  444 500

All our lifetime standards are sold dry and are simply reconstituted by adding 50 µL of either water/NaOH/EtOH and/or buffer. One vial of our lifetime standards will typically allow for 10 measurements to be undertaken, when 5 µL (from 50µL) is further diluted into 3 cm3 volumes within a cuvette, the λABS max > 0.1.

For optimum performance, probe vials should be stored at -2 to -8 C when not being used. Probe solutions should be used after dilution. Our data sheets, provided with the vials, provide detailed instructions for reconstitution and use.

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Lifetime Standards

We offer all 5 nanosecond Lifetime...

Sales price: $199.99

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2-Amino Purine in water, Ex = 295 nm,...

Sales price: $49.99

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p-Terphenyl in ethanol, Ex = 295 nm, Em...

Sales price: $49.99

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Fluorescein in water/pH 10, Ex = 444...

Sales price: $49.99

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PPD in ethanol, Ex = 282 nm, Em = 350...

Sales price: $49.99

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POPOP in ethanol, Ex = 295 nm, Em = 400...

Sales price: $49.99

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