JPS607343A - Atomic-absorption spectrophotometer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a light source lamp that produces resonance line radiation characteristic of one or more elements, and a monochromator that does not pass selective wavelength radiation characteristic of elements above l fMf. a wavelength controller configured to set said monochromator to said selected wavelength in response to said wavelength information; a microprocessor; An atomic absorption spectrophotometer comprising a memory for retaining wavelength information and an enabling device for enabling said microprocessor to identify one or more elements of said light source lamp, said microprocessor comprising: An atomic absorption spectrophotometer is configured to provide wavelength information retrieved from the memory for the identified element to the wavelength control device.

The above-mentioned spectrophotometric device is disclosed in British Patent Application No. 81i113.
It is described in the specification of No. 968 (corresponding to JP-A-58-88626). The spectrophotometer described in this British patent application uses a light source lamp having a network of resistors housed within its base; Furthermore, it comprises a measuring circuit which identifies from the value of said resistance the particular wavelength, ie the particular element represented by the co-attenuated radiation, originating from the lamp.

It is an object of the present invention to provide an atomic absorption spectrometer with other means of identifying the elements of the lamp.

The present invention includes a light source lamp that produces co-linear radiation characteristic of one or more elements, a monochromator that passes radiation at a selected wavelength characteristic of one or more elements, and a monochromator that is responsive to wavelength information provided to the a wavelength control device for setting the monochromator at the selected wavelength; a microprocessor; an enabling device for enabling a microprocessor to identify one or more elements of the light source lamp, the microprocessor comprising: an enabling device for enabling a microprocessor to identify one or more elements of the light source lamp; In the atomic absorption spectrophotometer 414 configured to supply extracted wavelength information to the wavelength control device, the light source lamp is encoded with a code representing one or more of the elements, and the spectrophotometer is The meter further includes an optical code reader and means for providing an output signal of the optical code reader to a microprocessor to enable the microprocessor to identify the one or more elements. It is characterized by

In one embodiment of the invention, the yCC clamp is fitted with a card having an optical code, and the optical code reader is provided with a groove into which said card can be inserted and read said code. You can do as you like. In another example, the light source lamp may be provided with a label on its outer surface having an optical code.

The spectrophotometer may further include a lamp turret holding a plurality of light source lamps, one optical code reader for each lamp on the turret.

The spectrophotometer of the invention further comprises: the optical code also represents a lamp operating current; the spectrophotometer has a lamp power supply;
said memory retains lamp current information, and said microprocessor stores said lamp current information from said memory;
The lamp power supply is controlled using other lamp current information extracted from the optical code by the optical code reader.

Further, the analytical operation of the spectrophotometer for analyzing one or more samples of one element of one said lamp is always stored in the read-write memory at least for the duration of this analysis. controlled by a microprocessor adapted to use a set of information, said set of information being
element-related information that can be retrieved from a read-only memory and includes wavelength information for said one or more samples, along with sample-related information that can be retrieved from another location for said one or more samples; You can do it like this.

The spectrometer also comprises holding means for holding more than one YCC clamp at one time, and an optical code reader is provided for each of the lamps so held; The output terminals of these optical code readers are connected to the microprocessor, and the spectrophotometer is further positioned to maintain one of the lamps at a time in the optical path of the monochromator. The analytical operating sequence of a spectrophotometer for sequentially analyzing said one or more samples for each element of said set of elements comprises positioning means for positioning said elements of said set of elements. a microprocessor controlling said holding and positioning means so as to sequentially place said lamps emitting non-obvious radiation in the path of a monochromator; The light source lamp for each element in the set of elements is controlled by a microprocessor that sequentially uses each information set of a plurality of information sets so as to form one set of information for each of the elements. yC of the number of sheets
The plurality of information sets, which are part of the C-clamp, may be stored in the read-write memory at least during the duration of the analysis operation sequence.

The invention will be explained with reference to the drawings.

As shown in FIG. 1, a resonant line yC source lamp in the form of a single-element cumulative hollow cathode mount HOL is placed in a sealed container, a vessel SE, with a hollow cathode 1-pole OA and an anode electrode AN.
has. A base BA is attached to the capacitor glP S E, and this base BA has two terminal pins P1 and P2 to which an anode AN and a cathode OA are respectively connected. It stands out from BA. These terminal bins are connected to the lamp power supply LPS
Connecting means are implanted from (see FIG. 4) to the anode AN and the cathode OA.

A label LA with an optical barcode is attached to the volume h/i S E of the hollow cathode lamp) i 0 L. This YC barcode represents the source of the lamp and can thereby also represent the current required by the lamp HOL, which is supplied from the lamp power supply IILPS. In order to read the code of this label LA, y
C logical code reading + H7Ho OR is provided, this code reading); g does not output the full jiff power depending on the code, this electrical output is supplied to the microprocessor μP in the °C original meter ( (See Figure 4).

Figure 2 shows a hollow cathode lamp)
A car FCC is attached to this lamp It CL by a linear flexible LL body ST passed through a hole drilled in a lug LU provided in a base LIA of the lamp assembly.

This card CG has an optical code representing the element of the lamp, and the lamp operates according to this code! ”= b
'+i can also be expressed.

Towards the science of barcodes - Barcode readers are ordinary devices and are widely used, for example, to code and automatically read products in supermarkets, but they cannot be used in any way. Optical code in the form of nozzles.

It is possible to use an appropriate aIC1 device. Card G.

It is also possible to encode the signal using a hole, pass the card through the optical path of the device, and cause the spectroscopic detector to generate a signal when the card passes through the hole or the optical path. This signal is provided to the microprocessor.

and decode it to determine the matching lamp. This platform first supplies the lamp with a current that is safe for all lamps and then increases the current to a certain value when a code is read. A perforation card associated with a separate source, 5 and detection eH'i can also be used. The card can be replaced with other forms, such as rods with a trephological code.

Figure 3 shows four light source lamps) IOLI to HOL4 and 4.
2 shows a turret TU in the form of a rotary table with three code readings 'tri OCR1 to 00R4;

The lamps HOLI to HOL4 are of the type shown in FIG. 2, and coded cards Got to GO4 are inserted into each of the code readers 00R1 to 00R4.
S 1 to 0034 are provided. One advantage of this configuration is that the presence of the card and therefore the inserted lamp ff1u4 can also be monitored at all times. Even without constantly monitoring the optical cord, it can be easily detected that the lamp has been removed from the socket by monitoring the current supplied from the lamp power supply LPS. The reason is that when the lamp is unplugged, the current supplied to the socket drops to zero.

The lamp assembly described with reference to FIGS.
elemental hollow cathode lamp with b or 1″ for one or more elements;
Other lamps that produce strong resonance radiation can also be used with the pestle. Such lamps include multi-element hollow shade three lamps and coreless pole lamps.

FIG. 4 shows four single-element hollow cathode lamps HOL, each constructed according to the lamp HOL explained with reference to FIG.
IJJi, which holds I~LLOL4, shows a child absorption spectrophotometer, and these lamps HOL1~) LOL4 are connected to Tsuji science code readers 0CR1~0 (3R4, respectively, and the outputs of these Ye science code readers ”+1! i1
The child is connected to the microprocessor μP&. These four lamps HOLY~HOL4 are held in a turret TU, and this turret is activated by the turret) fli(J (wholesale means')'UG, and at one time (four lamps) IOLI~HCL4 are activated. is placed in the optical path of the spectrophotometer.The fAS4 diagram shows the lamp l(G
It shows that L i is in the yC path. Lamp I (OL
The radiation emitted from the cathode CAL of I passes through the atomizer AT. This atomizer AT can be of a normal fire or flame type, or can be of a heat furnace type.

The sample to be sampled by the spectrophotometer for 4 minutes is supplied to the atomizer AT from an automatic sampler As operated by an automatic sampler control means ASC, which atomizer AT is operated by an atomizer control means ATO. After the radiation passes through the atomizer AT, it is converted into a monochromator and a monochromator.
go through.

The wavelength of the radiation passing through the monochromator is controlled by wavelength f[
MWo, and the passband of the monochromator MN, ie, the slit width, is selected by the slit control means ISO. The electron multiplier detector DET outputs a voltage whose amplitude is proportional to the intensity of the radiation originating from the monochromator M, and the logarithmic converter LG converts the output of this photomultiplier detector DET into the logarithm. It is proportionally amplified and outputs a voltage signal of 7.

The concentration of an element in the sample supplied to the atomizer AT and analyzed is essentially logarithmic (proportional to the output signal of the analyzer LG).

Two electrodes of each of the lamps) IOLI to I(OL4) are connected to the lamp power supply I and PS, but in Fig. 4, the connection of the hollow cathode '+'+, i-pole CA1, etc. is connected to one electrode each. 511' on the tangent line, it is only shown in AQXJ.
OL 1 □HCL 4 Installed card OC1~0
04 into the YT code reader 00RI~ocn4, these YC code readers immediately read the optical codes on these cards. & Take. This reading is repeated as a background check routine, which requires that the analog signal produced by the spectrophotometer, e.g. This background check routine can be used, for example, to generate an error signal if a lamp is not in place.

Microcomputer MOP is microprocessor μP
and a volatile read-consistent memory R that temporarily holds data for processing by this microprocessor μP.
AM and a memory ROM that holds program information that controls the operation of the microprocessor μP. Memory ROM is typically read-only memory. The bus BS reads the microprocessor μP and includes a memo! JRAM
, read-only memory ROM, analog-to-digital converter ADO, launch circuit means LH1 lamp power supply LPS
, turret control means TUO, automatic sunder control means AS
O, atomizer control means ATO, slit control means I
Connected to SO and wavelength control means MWO.

In addition to holding program information, the read-only memory ROM also holds element-related information for each of the multiple single-element hollow elements that can be used in the spectrophotometer (more than 60 Such single-element hollow cathode lamps can also exist at any given time with a code reader OCR
Only one or a few lamps, for example, four lamps, can be inserted into the liver and placed in the liver for 1 spectral luminosity.
It is 4. The microprocessor μP is kept in a state where it can identify the elements of one or several lamps. In the case of the four lamps HCLI to HOL4 shown in FIG. 4, this identification is performed by the processor via the latch circuit means LI.

Optical code reader 00RI~0CR4 to be read sequentially
I agree with the output of . The microprocessor μP further supplies the wavelength control means Mwc with wavelength '177 information retrieved from the read-only memory ROM for one lamp whose element has been identified and which is present in the optical path of the spectrophotometer. The TU and talent control means TUG contain means that enable the microprocessor μP to identify the lamps present in the optical path of the spectrophotometer.

The read only memory ROM also holds lamp current information. The microprocessor μP uses this lamp current 'I7J information for the lamp or lamps whose elements have been identified via the optical code reading means OCR to control the lamp power supply LPS.

The microprocessor μP controls the lamp power supplies Hi and PS by using a combination of the jσ large-lap TE flow information retrieved from the optical code by the optical code reader and the lamp current information retrieved from the sales-only memory ROM. It is advantageous to do so. If the optical code does not contain an information element representing the maximum lamp operating current of each lamp, the lamp'iu5iE information in the read-only memo It can be maintained in a memory location associated with each element so that the operating current of each lamp can be completely determined.

After the information is stored in read-only memory, it is necessary to analyze one or more samples for one single element using several solid cathode lamps. It is necessary to have both information and the information that flashes through the sample. The automatic operation of the spectrophotometric liver is J4' of these two swords.
J'ft information is combined to form a set of information, and this set of information is constantly stored in at least one non-volatile reading storage memory NVM during the duration of the analysis. It becomes easier. The microprocessor μP is connected to the memory NVM by the node BS and is adapted to use this set of information to control the above-mentioned analysis.

, the information relating to the elements of each set of information in the memo IJ M V M is retrieved from the read-only memo IJ ROM by the microprocessor μP when the element of the respective lamp is reduced. Transferred to M. Information related to this element is the wavelength information mentioned above,
slit width information supplied to the slit control means MSO. Atomizer AT or person.

In the case of a flame shape, the element-related information read from the read-only memo IJ ROM includes information identifying the Nli and flow 1'rt of the fuel supplied to the atomizer control means ATO, and -) 0 constant time. It can also contain information. Logarithmic converter LG and analog-to-digital converter AD
The time fd) at which the output signal of the detector DET supplied via O is averaged by the microprocessor μP in order to reduce the noise of that signal is determined by the above measurement time information. Even when the atomizer AT is an electric furnace type, the element-related information includes wavelength 'l'+'j information and slit width information, and this element-related information is further supplied to the atomizer control means A and TO. Include furnace heating cycle information. Furthermore, measurement time information for determining the peak height and peak range of the output signal of the detector DET may also be included in this element-related information.

The information related to the sample of each '111 report set in the memo IJ N V M can be stored by the user of the spectrophotometer in the memory N V M by means of the keypad KPD, which is connected to the microprocessor μF via the bus BS. can be placed in an appropriate storage location within the file. This sample related information includes the number of standard concentration samples to be held in the automatic sampler AS and information identifying the i5:i degrees of these sample i4+S test phases. The spectrophotometer is equipped with three background correction means (which are well known and will not be described in detail), in which case relevant information determines whether background correction should be used in a particular analysis. Also indicates the element.117 related to this element
The information may also include an override instruction to switch off background correction for elements whose wavelength of radiation passing through the monochromator is greater than or equal to a value.

After analyzing one or more it[i:Fl] for a single element, the results are temporarily stored in the microcomputer-MCP's volatile readout-i) included memo IJRAH and the final The data are output to a suitable recorder, for example the illustrated printer PRI, which is connected to the microprocessor μP by a bus BS, and optionally also to a display device (not shown).

For purposes of explanation, the automatic sampler AS will be of a type particularly suited for use with either a flame atomizer AT or an electric furnace atomizer AT, as the case may be. Furthermore, the automatic sampler control means ASO are usually partly specific to a particular automatic sampler As and are located within this automatic sampler, and furthermore partly permanently associated with the microprocessor μP and are arranged in a spectroscopic manner. It is located within the body of the gut.

It is well known that the atomic bomb is equipped with an inherent type of atomizer, and that it is possible to use this meter with other types of atomizers as accessories. be. Although the analogy is originally used in flame mode,
Atomic absorption C spectrometers that can also be used in electric furnace mode are known. In this case, the atomizer control means ATO for the electric bithermal furnace is provided as an accessory together with this electric heating furnace 1, and this electric heating furnace core is arranged in the main body of the device and is not permanently associated with the microprocessor μP. . Appropriate sensors (not shown) are also provided to distinguish the type of automatic sampler As and atomizer AT, and to operate the microprocessor μP appropriately. In the above case where the atomizer control means described herein is provided as an accessory to the spectrophotometer, a non-volatile read-write memory is provided, and a plurality of sets of furnace heating cycle information are stored in this memory. You can do it like this. This information is described above as being retrieved from a read-only memory IJ ROM, or alternatively, it may be stored in a non-volatile read-write memory of the electric furnace atomizer control means ATO and may be retrieved from this non-volatile read-write memory. The write memory can be considered as part of the non-volatile read memory IJNVM(7) which stores the entire set of information for analysis.

The non-volatile read/write memo IJ N V M & has a storage container for storing a plurality of information sets as described above. The analysis sequence of a spectrophotometer that sequentially analyzes one or more assays held in the autosampler AS for each of a set of elements is thus configured to sequentially use each of the plurality of information sets. , that is, one information set is used for each element of the element set.
controlled by 'tM h's ff7 information group reads and writes at least one memo during the duration of the analysis sequence.
Always store it in N V bi. For example, memo + J
N V M has a capacity to store at least four information sets, one information set for each of the four single-element hollow cathode lamps If OL 1 to HOL4 shown in FIG. When using four such amplifiers, the element-related information in each information set is retrieved from the read-only memory IJ ROM.

The C element meter can be applied to lamps other than those described with reference to FIGS. 1 and 2, which are coded to identify the respective elements. For example, each of the four turret lamp positions could be equipped with a conventional single element hollow cathode lamp. The user of this spectrophotometer, in this case, can easily provide the microprocessor μP with information identifying the element of each lamp by means of the keyband KPD, and the microprocessor μP will respond to this with a read-only note IJ. All necessary element-related information can be retrieved from the ROM and transferred to the non-volatile memory IJNVM for use. In the example shown, a conventional electrodeless discharge lamp can be installed at each of the four turret lamp positions. In this case as well, the user provides information identifying each element of the lamp using the keypad KPD, and in this case the user also needs to provide information for the auxiliary power source for operating the electrodeless discharge tube. In yet other examples, multi-element hollow cathode lamps may be used. These lamps can be regular lamps,
In this case, the user provides information identifying the lamp as a multi-element lamp, information identifying the elements of the lamp, and lamp current information using the keypad KPD. A variation is to provide a multi-element hollow cathode lamp with an optically encoded card, which can be read by an optical code reader to calculate the lamp current. A signal and information identifying the lamp as a multi-element lamp can be generated. In this case, the user uses the keypad KPD to provide information on the type of lamp element, and the microprocessor μP provides read-only memo IJ.
Element-related information is extracted from R01,i and transferred to a separate information set in the non-volatile read-write memo IJNVM for each element.

The spectrophotometer has a manual override function that allows the user to use the keypad KPD to retrieve element-related information that is different from the information that would otherwise be retrieved from the read-only memo IJ ROM.NVM
Is it possible to put it in the information group inside?

An external 81 computer (not shown) can be connected to bus BS via a suitable interface circuit. One use of external computers is non-volatile read-write memory NVM
The objective is to further facilitate automatic operation of the MinuteCyC meter by enhancing its functionality. For example, as mentioned above, once an information set derived from element-related information and sample-related information is stored in the non-volatile memo IJ N V M for a specific analysis, the non-volatile memo! JNV 1/
Even if the storage capacity iIt of L is completely used for other analyses, the above information set can be transferred to an external computer 111&
and call it again at any later time to obtain the above q
Can be used to iterate analysis of plans.

In the explanation of the atomic absorption yC photometer described above with reference to FIG. 4, only the features of such a spectrophotometer related to the present invention have been described, but other usual features may also be present. I can do it. For example, the output of the lamp power supply is usually modulated and the signal from the detector DE'I' is demodulated accordingly before processing in the logarithmic converter LG. It is also possible to apply gain control to the detector DET, which can be automatic. It is also possible to perform double-beam operation, i.e. to bypass the atomizer by providing a reference (°C) path and using the signal obtained from this reference path to drift the output of the equipment, in particular the output of the hollow cathode lamp and the output of the detector. To remove the baseline correction, perform the atomic absorption spectrophotometer.

This is a well-known selective funeral term. In the case of the minute C photometer described above with reference to FIG. 4, which can be operated automatically over long periods of time, dual beam operation is particularly advantageous and is used in most cases.

A flow chart of the operation of the spectroscopic yC meter shown in FIG. 4 is shown in FIG.

Operation 1 is "switch on", where the user switches on the 11 source to the spectrophotometer. Operation 2 is "?/J period 1 setting", and the user uses four single element hollow cathode lamps HOL.
1-II OL 4 is placed in the turret TU and installed by electrically connecting it, and four sets of corresponding information are placed in the non-volatile read-write memo IJ N V M.

There is only one manufacturing position for the lamp, and this corresponds to the position where the lamp is located on the optical axis of the yC dimeter, that is, the position of the lamp HOLI as shown in FIG. As each lamp is sequentially fabricated, this microprocessor μP is responsive to identifying each one of the lamp codes from the codes read by optical code readers 0CR1-OCR4. may transfer the appropriate element-related information for each separate set of information from the read-only memory ROM to the appropriate location i4 in the non-volatile memory IJ N V M.

Once each lamp is installed (in position 1'l), the user can memoize the appropriate sample-related information for each separate set of information using the keypad KPD and microprocessor μP.
It can be placed in M. When the sample set in automatic sampler AS becomes new, the same lamp HOL
It is necessary to operate the spectrophotometer so that the previous analysis for other sample sets is repeated for elements I-HOL4. If the lamp is already installed and the corresponding information set or non-volatile memo is already present in the non-volatile memo 'J N V bi', the user can rest assured that the 'switch on' action 1 and the 'initialisation' action 2 are carried out. There is no. In operation 3 "powering the lamps" the user switches on the lamp power supply LPS for each lamp in turn and in response to this operation for each lamp the microprocessor μP draws the appropriate lamp current from the non-volatile memory N V M. The information is extracted and provided to the lamp power supply unit W, LPS, and so on.

If the atomizer AT is flame-shaped, an operation (not shown) including operation by the user is required after operation 2 or 3 to ignite the flame of the atomizer AT. In operation 4 "starting the automatic sampler", the user starts the operation of the automatic sampler As, and in response to this operation selects an appropriate 'fi7 +;
are placed in the read-write memo IJRAM from the automatic sampler control means ASO, the operation of which spectrophotometer if can be fully automated under the control of the microprocessor μP without further intervention by the user.

In response to υ's work 4, microprocessor μP operates 5.
Set JN==1. Here N represents the turret count. Turret count N is 1 Tjl
l Decide which one of the four lamps HOLI to HCL4 should be dimmed in the X path during the execution of the sampler AS, i.e. the analysis of a sample for one element, and write the non-volatile memo IJ.
It also determines which set of information in N VM is used by the microprocessor μP during this analysis. Turret count N is a memo IJR read during each analysis.
Written by A.M. In response to operation 5, the microprocessor μP performs operation 6 ``set lamp turret to N''. In this operation, the turret (TU) is driven to position N by the turret control means TUO (at this stage N=1, which corresponds to the lamp HOLI).

In response to operation 6, the microprocessor μP controls operation 7 "Set slit" to set the slit using the slit width information that the slit width of the monochromator MN is obtained from the set of information in the non-volatile memory RAM. Control means M
Set by SO. The microprocessor μP then controls operation 8 "Set wavelength" to set the wavelength of the monochromator IN by the wavelength control means MWO using the wavelength information obtained from the set of information in the non-volatile memory RAM. As usual, the gain of the detector DET is automatically adjusted in conjunction with setting the monochromator wavelength.

Also, in response to operation 6, the microprocessor μP reads measurement time information from the non-volatile memory IJNVM and writes it to the volatile memory! Transfer to JRAM and microprocessor μP
makes it possible to use measurement time information for each element when measuring a sample.

Following operation 8, the microbe controller μP controls operation 9 "measuring blank". In this operation 9, the automatic sampler AS, under the control of the automatic sampler control means ASO, provides the atomizer AT with a sample whose concentration of one element, which is required to analyze a set of samples, is normally zero. This sample is atomized by an atomizer AT under the control of an atomizer control means ATO. The output signal of the detector DET is converted to a logarithmic converter LG and an analog-to-digital converter 1A.
The results are sent to the microprocessor μP via the DO and the results are read and written as a measurement baseline representing the zero concentration of the element during the analysis of the sample set for that element.
stored in M. When the atomizer AT is flame-shaped, the microprocessor μP is a non-volatile memory IJ N V M
Information about the type and flow rate of the fuel is given to the atomizer control means ATO, and the blank sample and all samples to be analyzed for specific elements are atomized.

, when the atomizer AT is of the electric heating furnace type, the microprocessor μP gives furnace heating cycle information from the nonvolatile memory NVM to the atomizer control means ATO, and stores the blank sample and all samples after analysis of specific elements. Allow to atomize. Following operation 9, the microprocessor μP controls operation 10 "standard sample measurement". In this operation, a predetermined number (this number is present in the set of relevant information in the non-volatile memory N V M) of standard samples, i.e. samples of known concentration, are successively transferred to the atomizer AT by the automatic sampler AS. give to In each case the detector D
The output signal of ET is sent to analog-to-digital converter ADO.
to the microprocessor μP, where the absorbance result is calculated by comparing it with the measurement baseline in the read-write memory IJ RAM and then to the read-write memory R.
AM Stored in AM. Following operation 10, microprocessor μP performs operation 11 "calibration". In this operation, the microprocessor μP retrieves the known concentration values of the standard sample from the set of relevant information in the non-volatile memory RAM and reads and writes these concentration values in operation 10 to the memory R.
A set of calibration coefficients is calculated using the standard sample absorbance results already stored in the AM and these calibration coefficients are then stored in a read-write memory RAM during the analysis for one element. These calibration factors enable subsequent sample measurements to be provided with a function known as scale magnification and curvature correction.

Following operation 11, the microprocessor μP performs operation 12 "
Control sample measurement, calculation, and concentration accumulation.

In this operation, an automatic sampler AS supplies a sample to the atomizer AT from a set of samples to be analyzed for a single element. A memory RA for reading and writing the absorption results of the sample derived from the output signal of the detector DET.1. (sent to
A calibration coefficient stored in the read-write memory RAM is applied to the absorption result to obtain a concentration result, and this concentration result is stored in the read-write memory RAM. After operation 12, the microprocessor μP performs the operation
Is J sampler finished? ” to control. In this operation,
The automatic sampler control means ASO detects whether the automatic sampler AS has reached the end of its running operation and there are no more samples to be measured. If the answer is [NQJ, repeat operation 12 for the next sample. Operation 12 is performed for all samples and each concentration result is read and written in the memo I.
When stored in J RAM, operation 13 outputs the answer ``Yes J'' and microprocessor μP outputs operation 14 ``N=Limit?J near tr. In this operation, the turret count N is checked. , it corresponds to the number of turret positions, e.g. 4 turret positions as shown in FIG. Answer r
Outputs No.J. In response to this, the microprocessor μP executes the operation 15rNminN+1 and increases the value of turret callan)N.

In response to action 15, the microprocessor μP performs action 6, which advances the tower (Turret) TU to the next position, places the next lamp I (C!L2) into the optical path of the spectrophotometer, and performs action 7.
Repeat steps 13 to 13 to continue providing another set of concentration results to the write memory RAM for the same sample set in the autosampler AS for the next lamp, single element of EfOL2. Finally, when operation 14 outputs the answer IJYesJ, microprocessor μP executes operation 16' ``print result and stop''. In this operation, all single element lamps HG in the TU! The concentration results for all samples of the sample set in the autosampler AS for elements LX NHOL4 are retrieved from the read-write memory RAM, tabulated and printed by the printer PRI, then the spectrophotometer is stopped. ie most power supplies are switched off and set to hibernation. To analyze a new set of samples, the user must initiate the entire sequence of operations from operation 1.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a resonant line light source lamp in the form of a single-element hollow cathode lamp with an optical cord on its outer surface; FIG. 3 is a plan view showing a lamp turret having four lamps shown in FIG. 2 and four optical code reading/receiving units; FIG. Figure 5 is a block diagram showing an atomic absorption collar type meter using four lamps as shown in Figure 4.
It is a flowchart for explaining the operation of the spectroscopic ye meter shown in the figure. HOL...Hollow cathode lamp SE...Container OA...Hollow cathode electrode AN...Anode type &BA...Base PL, P2...Terminal hinge L, A...Barcode label LPS...・Lamp power supply μP...Microprocessor Co...Card TU...Turret aaS...Groove OCR...Optical code reader AT...Atomizer ATO...Atomizer control means AS...Auto Sampler ASC... Automatic sampler control means MN... Monochromator MS (3... Slit control means MWC... Wavelength control means DET... Photomultiplier tube detector LG... Logarithmic converter ADO. ...Analog-to-digital converter RAM...Read-write memory ROM...Read-only memory LH...Latch circuit means TUO...Talent control means MVM...Non-volatile read-write memory KPD...
・Keypad RO Todo・・Read-only memory RAM・Read-write memory ~β・HCl2”>------

Claims (1)

What is claimed is: a light source lamp that produces resonant line radiation characteristic of eleven or more elements; a monochromator that passes radiation at a selected wavelength characteristic of the one or more elements; and a monochromator responsive to wavelength information provided; a wavelength control device for setting the monochromator to the selected wavelength; a microprocessor; and a memory retaining wavelength information at a location associated with each of the one or more elements of each of the plurality of light source lamps; , where the microprocessor is one or more of the light source lamps 3K'? i: an atomic absorption spectrophotometer comprising: an enabling device for enabling identification; said microprocessor supplies wavelength information retrieved from said memory for said identified element to said wavelength control device; In an atomic absorption spectrophotometer configured to perform the above-mentioned light source lamp, one or more of the above-mentioned elements? The spectrometer further includes an optical code reader, and the output signal of the optical code reader is supplied to a microprocessor which identifies the one or more elements. An atomic absorption spectrophotometer, characterized in that it is provided with means for making it absorbent. 2. In the atomic absorption spectrophotometer according to claim 1, a card having an optical code is attached to the yC source lamp, and the card is inserted into the optical hood reader to read the code. An atomic absorption spectroscopy yC meter, characterized in that it is provided with a groove for reading. 8. In the atomic absorption spectrophotometer &t according to claim 1, the light source lamp is provided with a label having an optical code on its outer surface.7i: The atomic absorption spectrophotometer characterized by: 4. In the atomic absorption spectrophotometer according to any one of claims 1 to 8, which has a lamp turret that holds a number of stages of light source lamps, an optical code reader is provided for each lamp position on the turret. An atomic absorption spectrophotometer characterized by: 1. An atomic absorption spectrophotometer according to any one of claims 1 to 4, wherein the optical code also represents a lamp operating current, the spectrophotometer has a lamp power supply, and the memory stores lamp current information. and the microprocessor controls the lamp power supply using the lamp current information from the memory and one optical code reader together with other lamp current information retrieved from the optical code. An atomic absorption spectrophotometer characterized in that: a. The atomic absorption spectrophotometer according to any one of claims 1 to 5, wherein the memory is a read-only memory. 1. The atomic absorption spectrophotometer according to claim 1, wherein the memory is a read-only memory, in which one or more samples are analyzed for one element of one lamp)
The analytical operation of the °C photometer is controlled by a microprocessor adapted to use one 'l'l II fJl always stored in the read-write memory at least for the duration of this analysis. , said information phase includes element-related information retrievable from a read-only memory for said element and including said wavelength information, and sample-related information retrievable from another location for said one or more sample specimens. An atomic absorption spectrophotometer comprising: & The atomic absorption spectrophotometer according to claim 7, wherein the atomic absorption spectrophotometer comprises holding means for holding more than one yC source lamp at a time, and the atomic absorption spectrophotometer comprises a holding means for holding more than one yC source lamp at a time, An optical code reader is provided for each, the output terminals of which are connected to said microprocessor, and the spectrophotometer further reads one of said lamps at a time. A spectrophotometric hepatic analysis operating sequence for sequentially analyzing said one or more samples for each element of a set of elements, comprising positioning means for positioning to hold within the optical path of a monochromator, comprises: a microprocessor for controlling said holding and positioning means to sequentially place said lamps emitting radiation representative of each element of said set of elements in the optical path of a monochromator; The light source lamp for each element in the set of elements is controlled by a microprocessor that sequentially uses each information phase of the plurality of information phases so that there is one information phase for each element in the set of elements. atomic absorption spectrophotometer, wherein the plurality of information phases are stored in a read-write memory for at least the duration of the analysis operating sequence. .