A photometric light absorption measuring apparatus

Claim 2

A photometric light absorption measuring apparatus for analysing a sample (30) contained in a transparent receptacle (28), the apparatus comprising: a light source (16) for directing intermittent pulses of light onto the sample (30) contained in the receptacle; power supply means (18) for pulsing said light source; spectroscope means (38) for dispersing each pulse, after transmission through the sample, into at least two components of preselected different wavelengths (λ1, λ2, ..., λ n ); detector means (40) for generating intensity signals (42) corresponding to each of said components of the light pulse; and an arithmetic unit (46) for determining the absorption of the sample by calculating the average mean value for all the pulses, of the difference between said intensity signals of said two components of each said pulse.

Claim 3

A photometric light absorption measuring apparatus according to claim 1, wherein said light source is an arc lamp.

Claim 4

A photometric,light absorption measuring apparatus according to claim 1, wherein said light source is a xenon-flash-lamp.

Claim 5

A photometric light absorption measuring apparatus according to any preceding claim, wherein said power supply is arranged to actuate said light source intermittently more than 15 times.

Claim 6

A photometric light absorption measuring apparatus for photometrically analysing the concentration of a sample (30) contained in a transparent receptacle (28), the apparatus comprising: a light source (16), for intermittently irradiating light upon the sample in the receptacle; power supply means (18) for pulsing said light source intermittently a predetermined number (n) of times; spectroscope means (38) for separating the light transmitted through the sample into at least two components of preselected different wavelengths (Xl, λ 2 , ..., n); first detector means (40) for generating for each of said two preselected different wavelengths a predetermined number (n) of light intensity signal data corresponding to the number of pulses of said light source; second detector means (52) for detecting misfiring of said light source and for generating data signals indicating a misfire condition; and an arithmetic unit (46) arranged to receive said light intensity data and said misfire data and to determine the absorbency of the sample by calculating the average mean value of the intensity differences between said preselected different wavelengths; said arithmetic unit being arranged to correct the calculation of the average mean value by excluding intensity data produced during said misfire condition.

Claim 7

A photometric light absorption measuring apparatus for photometrically analysing the concentration of a sample (30) contained in a transparent receptacle (28), the apparatus comprising: a light source (16), for intermittently irradiating light upon the sample in the receptacle; power supply means (18) for pulsing said light source intermittently a predetermined number (n) of times; spectroscope means (38) for separating the light transmitted through the sample into at least two components of preselected different wavelengths (Xl, λ 2 , ..., n); first detector means (40) for generating for each of said two preselected different wavelengths a predetermined number (n) of light intensity signal data corresponding to the number of pulses of said light source; second detector means (52) for detecting misfiring of said light source and for generating data signals indicating a misfire condition; and an arithmetic unit (46) arranged to receive said light intensity data and said misfire data and to determine the absorbency of the sample by calculating the average mean value of the intensity differences between said preselected different wavelengths; said arithmetic unit being arranged to correct the calculation of the average mean value by excluding intensity data produced during said misfire condition.

Claim 8

A biochemical analysing apparatus for analysing samples (30) contained in a series of successive transparent receptacles (28) comprising: a xenon-flash-lamp light source for supplying a light beam incident upon each sample in the successive series of receptacles; power supply means for pulsing said light source a predetermined number (n) of times to generate a corresponding number (n) of intermittent light pulses incident upon each sample from said light source; spectroscope means (38) for spearating each intermittent light beam transmitted through said sample into two preselected different wavelength components- 1 and 2 such that each preselected separated component has an intensity I 1 , I 2 , ..., In corresponding to each pulse of said light source; detection means (40) for generating a signal corresponding to each of said intensities I 1 (λ1), I 2 (λ1), ..., I n (λ1) and I 1 (λ2), I 2 (λ2), ..., In(λ2) of the transmitted intermittent light pulses for each of said two preselected wavelengths 1 and 2; and an arithmetic unit (46) for receiving said light intensity signals from said detection means and for determining the absorption of each of said sample to be analysed by calculating the average mean value of the light intensity differences between said two preselected wavelengths using the following relation:

Claim 9

A biochemical analysing apparatus for analysing samples (30) contained in a series of successive transparent receptacles (28) comprising: a xenon-flash-lamp light source for supplying a light beam incident upon each sample in the successive series of receptacles; power supply means for pulsing said light source a predetermined number (n) of times to generate a corresponding number (n) of intermittent light pulses incident upon each sample from said light source; spectroscope means (38) for spearating each intermittent light beam transmitted through said sample into two preselected different wavelength components- 1 and 2 such that each preselected separated component has an intensity I 1 , I 2 , ..., In corresponding to each pulse of said light source; detection means (40) for generating a signal corresponding to each of said intensities I 1 (λ1), I 2 (λ1), ..., I n (λ1) and I 1 (λ2), I 2 (λ2), ..., In(λ2) of the transmitted intermittent light pulses for each of said two preselected wavelengths 1 and 2; and an arithmetic unit (46) for receiving said light intensity signals from said detection means and for determining the absorption of each of said sample to be analysed by calculating the average mean value of the light intensity differences between said two preselected wavelengths using the following relation:

Claim 10

Biochemical analysing apparatus for analysing samples (30) contained in a series of successive transparent receptacles (28), the apparatus comprising: a light source (16) for intermittently irradiating light upon each sample in the successive series of receptacles; power supply means (18) for pulsing said light source intermittently a predetermined number (n) of times to generate a corresponding number (n) of intermittent light pulses incident upon each sample from said light source; spectroscope means (38) for separating each intermittent light pulse transmitted through said sample into two preselected different wavelength components λ1 and λ2 such that each preselected separated wavelength component has an intensity I 1 , I 2 , ..., In corresponding to each flash of said light source; detection means (40) for generating a signal corresponding to each of said intensities I 1 (λ1), I 2 (λ 1 ), ..., I n (λ1) and Il(X2), I 2 (λ2), ..., I n (λ2) of the transmitted intermittent light pulses for each of said two preselected wavelengths λ1 and λ2; and an arithmetic unit (46) for receiving said light intensity signals from said detection means and for determining the absorbence of each of said sample to be analysed by calculating the average mean value of the intensity differences between said two preselected wavelengths using the following relation:

Claim 11

Biochemical analysing apparatus for analysing samples (30) contained in a series of successive transparent receptacles (28), the apparatus comprising: a light source (16) for intermittently irradiating light upon each sample in the successive series of receptacles; power supply means (18) for pulsing said light source intermittently a predetermined number (n) of times to generate a corresponding number (n) of intermittent light pulses incident upon each sample from said light source; spectroscope means (38) for separating each intermittent light pulse transmitted through said sample into two preselected different wavelength components λ1 and λ2 such that each preselected separated wavelength component has an intensity I 1 , I 2 , ..., In corresponding to each flash of said light source; detection means (40) for generating a signal corresponding to each of said intensities I 1 (λ1), I 2 (λ 1 ), ..., I n (λ1) and Il(X2), I 2 (λ2), ..., I n (λ2) of the transmitted intermittent light pulses for each of said two preselected wavelengths λ1 and λ2; and an arithmetic unit (46) for receiving said light intensity signals from said detection means and for determining the absorbence of each of said sample to be analysed by calculating the average mean value of the intensity differences between said two preselected wavelengths using the following relation: