JPS6214772B2 - - Google Patents
Info
- Publication number
- JPS6214772B2 JPS6214772B2 JP7325579A JP7325579A JPS6214772B2 JP S6214772 B2 JPS6214772 B2 JP S6214772B2 JP 7325579 A JP7325579 A JP 7325579A JP 7325579 A JP7325579 A JP 7325579A JP S6214772 B2 JPS6214772 B2 JP S6214772B2
- Authority
- JP
- Japan
- Prior art keywords
- sample
- gas
- flame
- flow rate
- sample introduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 49
- 238000004458 analytical method Methods 0.000 description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 239000003595 mist Substances 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007496 glass forming Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/71—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited
- G01N21/72—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light thermally excited using flame burners
Landscapes
- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Description
【発明の詳細な説明】
本発明は試料ガスを火炎中に導入してその発光
光度にもとづいて試料分析する連続炎光光度分析
計において、とくに試料流量を一定に保つような
補正手段に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention particularly relates to a correction means for keeping the sample flow rate constant in a continuous flame photometric analyzer that introduces a sample gas into a flame and analyzes the sample based on the luminous intensity of the sample gas.
酸水素炎、ブンゼン炎などの火炎中に試料ガス
を流入し、火炎中で炎光を発する元素を、その光
量によつて定量分析する光度分析計が知られてい
るが、これをいま第１図によつて説明する。 A photometric analyzer is known that allows a sample gas to flow into a flame such as an oxyhydrogen flame or a Bunsen flame, and quantitatively analyzes the elements that emit flame light in the flame based on the amount of light. This will be explained using figures.
例えば、SO2用炎光光度分析計の場合、石英ガ
ラスやその他の透光器でつくつた検出容器８内の
バーナジエツト１からは、水素供給通路２から送
り込まれた水素ガスの火炎が噴出し、この水素炎
４に試料導入管５から供給されるSO2を含むガス
が導入される。 For example, in the case of a flame photometric analyzer for SO 2 , a flame of hydrogen gas sent from a hydrogen supply passage 2 blows out from a burner jet 1 in a detection vessel 8 made of quartz glass or other transparent material. A gas containing SO 2 supplied from the sample introduction tube 5 is introduced into the hydrogen flame 4 .
検出容器８には通路３から流量計２８で計量さ
れた助燃空気、及び助燃空気を希釈するため通路
２７の流量計２９で計量された純窒素ガスも導入
され、上記水素ガスの燃焼を安定的に維持する。 Into the detection container 8, auxiliary combustion air measured by a flowmeter 28 from the passage 3, and pure nitrogen gas measured by a flowmeter 29 in the passage 27 to dilute the auxiliary combustion air are also introduced, and the combustion of the hydrogen gas is stabilized. maintain it.
試料ガス（SO2を含むガス）は、試料導入通路
２０から試料ポンプ１８によつて吸引加圧され、
三方電磁弁１３を経て試料導入部１２より前記試
料導入管５へと送られる。 The sample gas (gas containing SO 2 ) is sucked and pressurized from the sample introduction passage 20 by the sample pump 18 .
The sample is sent from the sample introduction section 12 to the sample introduction tube 5 via the three-way solenoid valve 13.
これらの供給系はヒートライン２１で被われ、
例えば120〜200℃に加熱される。 These supply systems are covered with heat lines 21,
For example, it is heated to 120-200°C.
試料ガスの供給流量を制御するために、排出通
路２３に定圧レギユレータ１４が介装されるとと
もに、その上流から分岐したバイパス通路２４に
流量制御弁１６が介装され、バイパス流量及び圧
力を調整することにより供給流量を設定値に制御
する。 In order to control the supply flow rate of the sample gas, a constant pressure regulator 14 is interposed in the discharge passage 23, and a flow control valve 16 is interposed in the bypass passage 24 branched from the upstream thereof to adjust the bypass flow rate and pressure. By this, the supply flow rate is controlled to the set value.
１５はバイパス流量計、３２は試料ガス圧力計
である。また、２５はゼロガスの供給通路、２６
はスパンガスの供給通路、１７はこれらを切換え
る三方電磁弁で、試料ガス（SO2）と選択的に切
換られてこれらのガスが三方電磁弁１３を介して
導入される。 15 is a bypass flow meter, and 32 is a sample gas pressure gauge. Further, 25 is a zero gas supply passage, 26
Reference numeral 17 indicates a supply passage for span gas, and 17 indicates a three-way solenoid valve for switching between these gases.These gases are introduced via the three-way solenoid valve 13 while being selectively switched to the sample gas (SO 2 ).
このようにして供給されるSO2を含む試料ガス
が水素炎４に流入すると、硫黄固有の炎光スペク
トルを発する。検出容器８の一部を構成する石英
ガラスを通過した炎光のうち、光学フイルタ（例
えば3940ű３％）７によつて硫黄炎光スペクト
ル以外の帯域を除去する。このようにして試料ガ
ス中の炎光を発する元素のスペクトルのみを光電
子増倍管６で捉え、増幅器１０で増幅した上で分
析計メータ１１にて表示するのである。 When the sample gas containing SO 2 supplied in this way flows into the hydrogen flame 4, it emits a flame spectrum unique to sulfur. Of the flame light that has passed through the quartz glass forming a part of the detection container 8, an optical filter (for example, 3940 ű3%) 7 removes bands other than the sulfur flame light spectrum. In this way, only the spectrum of the element that emits flame in the sample gas is captured by the photomultiplier tube 6, amplified by the amplifier 10, and then displayed by the analyzer meter 11.
ところで、この連続火炎光度分析計では、第２
図に示すように、試料流量が変化すると、試料の
同一濃度に対する出力が変動してしまう。 By the way, in this continuous flame photometer, the second
As shown in the figure, when the sample flow rate changes, the output for the same sample concentration varies.
これは試料流量の増減により共存ガスの影響が
変化するためであり、したがつて実用上からは常
に試料ガスの流量を正確に一定値に制御する必要
がある。 This is because the influence of the coexisting gas changes as the sample flow rate increases, and therefore, from a practical standpoint, it is necessary to always accurately control the sample gas flow rate to a constant value.
しかしながら、試料導入管５の内径は、例え
ば、0.2mmと非常に小さく、このため試料ポンプ
１８の上流にフイルタ１９を設けて試料中のミス
トを除去するようにしているのにもかかわらず、
試料導入管５の内壁にフイルタ１９を透過した一
部のミストが付着し、長時間使用しているとこの
ミストの付着により流量変化をきたし、分析誤差
を生じやすくなる。 However, the inner diameter of the sample introduction tube 5 is very small, for example, 0.2 mm, and therefore, even though a filter 19 is provided upstream of the sample pump 18 to remove mist in the sample,
A part of the mist that has passed through the filter 19 adheres to the inner wall of the sample introduction tube 5, and when used for a long time, the adhesion of this mist causes a change in the flow rate, which tends to cause analysis errors.
そこで従来は試料を一定流量に保つために、定
期的に試料導入管５などを小分解して、石ケン膜
流量計を取付けて試料導入部の圧力と流量の関係
を測定しなおし、所定の流量が得られるように定
圧レギユレータ１４や流量制御弁１６を調整する
ことにより試料導入部１２の圧力を制御してい
た。 Conventionally, in order to keep the sample at a constant flow rate, the sample introduction tube 5 was periodically disassembled, a soap membrane flowmeter was attached, and the relationship between the pressure and flow rate at the sample introduction part was measured again. The pressure in the sample introduction section 12 was controlled by adjusting the constant pressure regulator 14 and the flow control valve 16 so that the flow rate could be obtained.
しかしこの方法では、その間の分析操作の中止
が長びき、また分解などに手間がかかるなどの問
題があり、また、試料導入管５のミスト付着によ
る圧力・流量特性が変化しても分解するまでは簡
単に判別することができないので、実際にはミス
トの付着がなくても定期的な分解が必要であつ
た。 However, with this method, there are problems such as the analysis operation being stopped for a long time, and it takes time and effort to disassemble the sample.Furthermore, even if the pressure/flow characteristics change due to mist adhering to the sample introduction tube 5, it will take a long time to disassemble the sample. cannot be easily determined, so periodic disassembly is required even if there is no mist attached.
本発明はこのような問題を解決するために提案
されたもので、試料流量を直接的に測定するかわ
りに、助燃空気中に暗電流を変化させる物質を一
定量混合し、その暗電流値を既知濃度の基準ガス
（ゼロガス）を供給しながら比較し、予め判明し
ている所定の炎光量が得られるように試料導入管
の試料導入部の圧力を調整することにより、間接
的に試料導入管の流量値を一定に補正することを
可能としたものである。 The present invention was proposed to solve these problems.Instead of directly measuring the sample flow rate, the present invention mixes a certain amount of a substance that changes the dark current in the auxiliary combustion air, and measures the dark current value. By comparing while supplying a reference gas (zero gas) with a known concentration, and adjusting the pressure at the sample introduction part of the sample introduction tube so that a predetermined amount of flame light known in advance is obtained, the sample introduction tube can be indirectly This makes it possible to correct the flow rate value to a constant value.
以下、本発明の実施例を図面にもとづいて説明
する。 Embodiments of the present invention will be described below based on the drawings.
第３図に示すように、本発明では助燃空気の供
給通路２７に、測定対象成分を含まずかつ暗電流
が増える一定濃度のガス物質（例えばCO2、
CO、NO、HCなど試料中に共存する物質）であ
る干渉ガスの供給通路３１を三方電磁弁３３を介
して合流させ、試料流量のチエツク時にこの干渉
ガスを所定量だけ助燃空気中に混入できるように
してある。 As shown in FIG. 3, in the present invention, the auxiliary combustion air supply passage 27 is filled with gaseous substances (e.g. CO 2 ,
The supply passage 31 of the interference gas (substances coexisting in the sample such as CO, NO, HC, etc.) is merged via the three-way solenoid valve 33, and a predetermined amount of this interference gas can be mixed into the auxiliary combustion air when checking the sample flow rate. It's like this.
試料分析に先だち、三方電磁弁１３によつて試
料ガス（例えばSO2を含むガス）をカツトして通
路２５からの基準ガス（ゼロガス：純窒素）を試
料導入管５に流入し、試料導入部１２の圧力を、
予め圧力・流量特性にもとづいて決めてある規定
圧力となるように、圧力調整弁１４またはバイパ
ス流量制御弁１６で調整する。 Prior to sample analysis, the sample gas (for example, gas containing SO 2 ) is cut off by the three-way solenoid valve 13 and the reference gas (zero gas: pure nitrogen) from the passage 25 flows into the sample introduction tube 5 , and the sample gas is introduced into the sample introduction section. 12 pressures,
The pressure adjustment valve 14 or the bypass flow rate control valve 16 is used to adjust the pressure to a specified pressure determined in advance based on pressure/flow characteristics.
この状態で水素炎中で炎光を発するゼロガス
（窒素）の炎光出力値を分析メータ１１で測定す
る（なお、この出力を暗電流という）。 In this state, the flame output value of zero gas (nitrogen) that emits flame light in the hydrogen flame is measured with the analytical meter 11 (this output is referred to as dark current).
この暗電流にもとづく出力を電気的にキヤンセ
ルし、分析メータ１１の出力をゼロに調整する。 The output based on this dark current is electrically canceled and the output of the analytical meter 11 is adjusted to zero.
次に、供給通路３１からの干渉ガスを一定流量
だけ助燃空気に混入して火炎に導く。 Next, a constant flow rate of the interference gas from the supply passage 31 is mixed into the auxiliary combustion air and introduced into the flame.
すると、この干渉ガスによる炎光にもとづいて
発生する暗電流により、上記ゼロレベルに合せた
分析メータ１１の出力が上がるが、この出力値を
暗電流の調整値という。 Then, due to the dark current generated based on the flame light generated by this interference gas, the output of the analytical meter 11, which is set to the above-mentioned zero level, increases, and this output value is called the dark current adjustment value.
この調整値は火炎の状態が一定ならば、増幅器
１０の増幅率に応じて増大された一定値をとる。 This adjustment value assumes a constant value that is increased in accordance with the amplification factor of the amplifier 10 if the flame condition is constant.
このようにして、試料分析を開始する前に、試
料流量と同一量のゼロガスを供給しながら一定流
量の干渉ガスを火炎に導入して、基準となる暗電
流値を測定しておく。 In this way, before starting sample analysis, a constant flow rate of interference gas is introduced into the flame while supplying zero gas in an amount equal to the sample flow rate, and a reference dark current value is measured.
次に、三方電磁弁３３を切換えて干渉ガスをカ
ツトする一方、三方電磁弁１３によりゼロガスを
遮断して試料ガスの導入を開始する。 Next, the three-way solenoid valve 33 is switched to cut out the interfering gas, while the three-way solenoid valve 13 shuts off the zero gas and the introduction of the sample gas is started.
試料導入管５を流れる流量は、試料導入部１２
の圧力に比例するが、この設定圧力値はゼロガス
の導入時と同一に調整してあるので、分析開始時
は予め決められた所定の流量が得られる。 The flow rate flowing through the sample introduction tube 5 is the same as that of the sample introduction section 12.
However, since this set pressure value is adjusted to be the same as when zero gas is introduced, a predetermined flow rate determined in advance is obtained at the start of analysis.
このようにして分析を行い、その過程において
試料導入管５の内壁にミストなどが付着すると、
管路有効断面積が縮少して試料流量が減少する。 Analysis is performed in this way, and if mist or the like adheres to the inner wall of the sample introduction tube 5 during the process,
The effective cross-sectional area of the pipe is reduced and the sample flow rate is reduced.
試料流量が減れば、第６図のように、分析メー
タ１１の出力値は試料ガス濃度が同一であつても
低下してしまう。 If the sample flow rate decreases, as shown in FIG. 6, the output value of the analytical meter 11 will decrease even if the sample gas concentration remains the same.
そこで、試料導入管５の流量測定を行うのであ
るが、この場合は、まず試料ガスのかわりにゼロ
ガスを試料導入管５に流し、次いで干渉ガスを最
初の測定時と同一流量だけ助燃空気中に導入した
上で暗電流の調整値を測定する。 Therefore, we measure the flow rate of the sample introduction tube 5. In this case, we first flow zero gas into the sample introduction tube 5 instead of the sample gas, and then introduce the interference gas into the auxiliary combustion air at the same flow rate as during the first measurement. After introducing it, measure the dark current adjustment value.
もしミストの付着がなく流量が変化していない
とすれば、この調整値は最初の測定値と同一の値
を示すので、この場合は、ガス導入部１２の圧力
をそのままとして、再び分析を継続する。 If there is no mist attached and the flow rate does not change, this adjusted value will show the same value as the first measured value, so in this case, the pressure in the gas inlet 12 will remain unchanged and the analysis will continue again. do.
ところがミストの付着により流量が減少してい
れば、ゼロガスにもとづく炎光出力値（暗電流）
が下がり、調整値のゼロ点が相対的に低下するの
で、干渉ガスによる暗電流が同一にもかかわらず
分析メータ１１に表示される調整値は低下してし
まう。 However, if the flow rate decreases due to adhesion of mist, the flame output value (dark current) based on zero gas
decreases and the zero point of the adjustment value relatively decreases, so the adjustment value displayed on the analysis meter 11 decreases even though the dark current due to the interference gas is the same.
このようなときは、定圧レギユレータ１４の設
定値を変化させるかバイパス流量制御弁１６を調
整して、上記暗電流の調整値が最初の値と一致す
るまで、試料導入部１２の圧力を上昇させる。 In such a case, change the set value of the constant pressure regulator 14 or adjust the bypass flow control valve 16 to increase the pressure in the sample introduction section 12 until the dark current adjustment value matches the initial value. .
試料導入管５の有効管路面積が減つても、導入
部圧力を上げれば流量の減少分を増量補正するこ
とができ、このようにして圧力を調整することに
より、間接的に試料流量を設定値に制御すること
が可能となる。 Even if the effective pipe area of the sample introduction tube 5 decreases, the decrease in flow rate can be compensated for by increasing the introduction pressure, and by adjusting the pressure in this way, the sample flow rate can be indirectly set. It becomes possible to control the value.
したがつて本発明では、試料導入管５などを小
分解して流量を測定しなおす必要がなく、簡単に
流量調整を行うことができるのである。 Therefore, in the present invention, there is no need to disassemble the sample introduction tube 5 or the like to measure the flow rate again, and the flow rate can be easily adjusted.
次に、第４図の実施例は、干渉ガスを通路３に
合流させるかわりに、供給通路３１′及び流量制
御弁３４を介して検出容器８の内部に直接的に導
入するようにしたものを示し、また第５図の実施
例は、さらに干渉ガス噴射管３５により、水素炎
４の内部に干渉ガスを噴出させるようにしたもの
である。 Next, in the embodiment shown in FIG. 4, the interference gas is directly introduced into the detection container 8 via the supply passage 31' and the flow rate control valve 34 instead of being merged into the passage 3. In the embodiment shown in FIG. 5, interference gas is further jetted into the hydrogen flame 4 by an interference gas injection pipe 35.
いずれも、第１の実施例と同様な効果を発揮し
かつ従来装置に即座に取付けられるという利点を
有する。 Both have the advantage that they exhibit the same effects as the first embodiment and can be immediately attached to conventional equipment.
以上説明したように本発明によれば、試料流量
のチエツク及び調整を、干渉ガスを導入して暗電
流の調整値を比較しながら簡単に行うことがで
き、したがつて従来のように流量調整に手間がか
からず、かつ精度のよい調整を行うことができ
る。 As explained above, according to the present invention, it is possible to easily check and adjust the sample flow rate while introducing an interference gas and comparing the dark current adjustment value. Adjustments can be made with high precision and without much effort.
第１図は従来装置の断面図、第２図は試料流量
による試料濃度と炎光出力値の関係をあらわす特
性図、第３図は本発明第１実施例の要部を示す断
面図、第４図、第５図はそれぞれ第２、第３実施
例の要部の断面図、第６図は試料流量と炎光出力
の関係をあらわす特性図である。
１……バーナジエツト、２……水素供給路、３
……助燃空気供給通路、４……火炎、５……試料
導入管、６……光電子増倍管、７……光学フイル
タ、１０……増幅器、１１……分析メータ、１２
……試料導入部、１３……三方電磁弁、１４……
定圧レギユレータ、１６……バイパス流量制御
弁、１９……ダストフイルタ、２５……ゼロガス
供給通路、２７……希釈用窒素供給通路、３１…
…干渉ガス供給通路、３３……三方電磁弁、３４
……流量制御弁、３５……干渉ガス噴射管。
Fig. 1 is a sectional view of a conventional device, Fig. 2 is a characteristic diagram showing the relationship between sample concentration and flame output value depending on the sample flow rate, and Fig. 3 is a sectional view showing the main parts of the first embodiment of the present invention. 4 and 5 are sectional views of essential parts of the second and third embodiments, respectively, and FIG. 6 is a characteristic diagram showing the relationship between the sample flow rate and the flame output. 1... Burner jet, 2... Hydrogen supply path, 3
... Combustion auxiliary air supply passageway, 4 ... Flame, 5 ... Sample introduction tube, 6 ... Photomultiplier tube, 7 ... Optical filter, 10 ... Amplifier, 11 ... Analysis meter, 12
...Sample introduction section, 13...Three-way solenoid valve, 14...
Constant pressure regulator, 16... Bypass flow control valve, 19... Dust filter, 25... Zero gas supply passage, 27... Nitrogen supply passage for dilution, 31...
...Interference gas supply passage, 33...Three-way solenoid valve, 34
...Flow rate control valve, 35...Interference gas injection pipe.
Claims (1)
発する元素を、その光量を検出して定量する分析
計において、火炎を形成するための助燃空気また
は該助燃空気と一定量の干渉ガスを選択的に導入
する手段と、前記火炎に試料導入管を経て既知濃
度の基準ガスまたは試料を選択的に導入するとと
もに該基準ガス及び試料の前記試料導入管の試料
導入部の圧力を調整して該試料導入管の流量を一
定に制御する手段とを備えたことを特徴とする連
続炎光光度分析計。1. In an analyzer that detects and quantifies elements that emit flame light in flames such as oxyhydrogen flames and Bunsen flames by detecting the amount of light, auxiliary combustion air for forming the flame or a certain amount of interference gas with the auxiliary combustion air is used. means for selectively introducing a reference gas or a sample of a known concentration into the flame through a sample introduction tube, and adjusting the pressure of the reference gas and sample at a sample introduction portion of the sample introduction tube; A continuous flame photometric analyzer characterized by comprising means for controlling the flow rate of the sample introduction tube to a constant value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7325579A JPS55164338A (en) | 1979-06-11 | 1979-06-11 | Continuous flame photometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7325579A JPS55164338A (en) | 1979-06-11 | 1979-06-11 | Continuous flame photometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55164338A JPS55164338A (en) | 1980-12-22 |
| JPS6214772B2 true JPS6214772B2 (en) | 1987-04-03 |
Family
ID=13512879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7325579A Granted JPS55164338A (en) | 1979-06-11 | 1979-06-11 | Continuous flame photometer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55164338A (en) |
-
1979
- 1979-06-11 JP JP7325579A patent/JPS55164338A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55164338A (en) | 1980-12-22 |
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