Shimadzu Corporation

Kazuo Sugihara

Katsumi Harada

Yukun Liu

A storage unit stores first and second calibration curves. The first calibration curve represents a relationship between an absorbance of a first standard sample for light at a wavelength &#x3bb;and a concentration of a target composition in the first standard sample. The second calibration curve represents a relationship between an absorbance of a second standard sample for light at a wavelength &#x3bb;and a concentration of the target composition in the second standard sample. The second standard sample has a higher concentration than that of the first standard sample. When the absorbance of the unknown sample for the light at the wavelength &#x3bb;is less than a threshold, a concentration measurement processing unit measures a concentration of the target composition in the unknown sample, based on the absorbance of the unknown sample for the light at the wavelength &#x3bb;and the first calibration curve.

Atomic absorption spectrophotometer and atomic absorption measurement method

There are provided an atomic absorption photometer and an atomic absorption measurement method which can easily perform background correction in a short time period by using a plurality of types of methods while suppressing the amount of samples consumed. Background correction is performing by using each of the D2 lamp method, the Zeeman method, and a self-reversal method, according to measurement data in each of measurement periods Tto Tobtained in one data acquisition cycle. Background correction is performed on the common measurement data (atomic absorption data) obtained in the atomic absorption measurement period T, by using the measurement data (background data) obtained in each of the first to third background measurement periods T, T, and T

Atomic absorption photometer and atomic absorption measurement method

There are provided an atomic absorption spectrophotometer capable of effectively preventing saturation of a signal voltage of a detector at the time of measurement, and a signal voltage optimization method used by the same. Test measurement of a sample is performed in a state where a preset value is taken as a set value of the signal voltage of the detector. The set value of the signal voltage of the detector corresponding to the sample is optimized based on the signal voltage of the detector at the time of the test measurement of the sample. In this manner, by optimizing the set value of the signal voltage of the detector corresponding to the sample through test measurement using the actual sample, saturation of the signal voltage of the detector at the time of measurement may be effectively prevented.

Atomic absorption spectrophotometer and signal voltage optimization method used by the same

An atomic absorption spectrophotometer that memorizes the maximum amount of light of each light source when an transmissivity of each of a plurality of dimmers is largest; computes an appropriate transmissivity of each dimmer for equalizing the amounts of light of the plurality of light sources from the maximum amount of light of each of the light sources; and sets the dimmer's transmissivity to be the appropriate transmissivity.

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Kyoto, Japan

Kazuo Sugihara