Dung dịch chuẩn 667.005

Hãng sản xuất: HELLMA

Holmium liquid filter (241 – 640 nm) for checking the wavelength accuracy

The holmium liquid filter consists of a solution of holmium oxide dissolved in perchloric acid.

 

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Holmium liquid filter (241 – 640 nm) for checking the wavelength accuracy

The holmium liquid filter consists of a solution of holmium oxide dissolved in perchloric acid. This filter is ideally suited to checking the wavelength accuracy of spectrophotometers in the UV and visible range. It has a spectrum with a variety of characteristic, very well-defined peaks in the range between 240 nm and 640 nm.

This filter is recommended in the Ph. Eur. and in the USP for checking the wavelength accuracy in the range of 240 – 640 nm.

Ph. Eur. = European Pharmacopoeia
USP = United States Pharmacopeia

Typical spectrum of holmium dissolved in perchloric acid, measured at a slit width of 1 nm

ARTICLE-NO. 667005    
APPLICATION Checking the wavelength accuracy according to Ph. Eur. in the UV and Vis range
CONTENT Holmium in perchloric acid
STANDARD CERTIFICATION Wavelengths: 241, 287, 361, 536, 640 nm
Slit width: 1 nm; with DAkkS calibration certificate
POSSIBLE CERTIFICATION Wavelengths: 241, 250, 278, 287, 333, 345, 361, 386, 416, 451, 468, 485, 536, 640 nm
Slit width: all up to 2 nm
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