• Humidity indicator check
Click here for Dry Indicator, Humidity Lamp.
• Sample compartment window check
Visually check that the sample compartment window (KBr) is transparent.
If the KBr crystal has become cloudy, replace it with a new one.
If the KBr crystal has become cloudy, replace it with a new one.
NOTE: The KBr crystal becomes cloudy from absorbing moisture, and therefore reducing transmittance.
If a KBr crystal that has absorbed moisture is not replaced, deliquescence may occur, causing the sample compartment window to become contaminated with KBr solution.
If a KBr crystal that has absorbed moisture is not replaced, deliquescence may occur, causing the sample compartment window to become contaminated with KBr solution.
• Power Spectrum Check
FTIR performance is evaluated by measuring the power spectrum.
The power spectrum gives the intensity at various wavenumbers.
After ensuring that the sample chamber is empty, configure the following parameters and measure the power spectrum to verify the following specifications.
In the [Data] tab of Scan Parameters
The power spectrum gives the intensity at various wavenumbers.
After ensuring that the sample chamber is empty, configure the following parameters and measure the power spectrum to verify the following specifications.
In the [Data] tab of Scan Parameters
• Scan mode: Power Spectrum
• Resolution: 2 cm-1
• Range: 4700 to 340 cm-1
• N scans: 45 scans
• Apodization: HAPP-GENZEL
• Resolution: 2 cm-1
• Range: 4700 to 340 cm-1
• N scans: 45 scans
• Apodization: HAPP-GENZEL
• Detector: Standard
• Beam: Internal
• Detector speed: 2.8 mm/sec (In [More] tab)
• Beam: Internal
• Detector speed: 2.8 mm/sec (In [More] tab)
The intensity specifications are given below.
*）There is an absorbance peak of water at 400 cm−1, so correct intensity of the power spectrum is not calculated. Thus the intensity of 403 cm−1 is used for evaluation of the power spectrum.
If the intensity does not meet the specifications, or the energy at high wavenumbers (to 4600 cm−1) is extremely low, run [Auto adjustment], and reanalyze the spectrum. If the power spectrum does not improve after the "auto adjustment", the system may be damaged; contact a Shimadzu sales or service representative. If the power spectrum intensity at all wavenumbers is close to zero, the light source may be disconnected.
Contact a Shimadzu sales or service representative, if the light source is disconnected. Light source replacement should be performed by our service personnel.
Contact a Shimadzu sales or service representative, if the light source is disconnected. Light source replacement should be performed by our service personnel.
The validation program inspects the FTIR condition instead of Power spectrum check.
IRTracer-100 series provides the validation programs according to the Japanese Pharmacopoeia, European Pharmacopoeia, Chinese Pharmacopoeia and ASTM.
IRTracer-100 series provides the validation programs according to the Japanese Pharmacopoeia, European Pharmacopoeia, Chinese Pharmacopoeia and ASTM.
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