JPH0252240A - Solution circulation type automatic absorption analysis - Google Patents
Solution circulation type automatic absorption analysisInfo
- Publication number
- JPH0252240A JPH0252240A JP20283688A JP20283688A JPH0252240A JP H0252240 A JPH0252240 A JP H0252240A JP 20283688 A JP20283688 A JP 20283688A JP 20283688 A JP20283688 A JP 20283688A JP H0252240 A JPH0252240 A JP H0252240A
- Authority
- JP
- Japan
- Prior art keywords
- absorbance
- ion
- measured
- average value
- calibration curve
- 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.)
- Pending
Links
- 238000004458 analytical method Methods 0.000 title claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 10
- 150000002500 ions Chemical class 0.000 claims abstract description 39
- 238000002835 absorbance Methods 0.000 claims abstract description 31
- 238000011088 calibration curve Methods 0.000 claims abstract description 17
- 230000002159 abnormal effect Effects 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 238000004040 coloring Methods 0.000 claims description 25
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 10
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 description 19
- 239000012488 sample solution Substances 0.000 description 8
- 238000011481 absorbance measurement Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004847 absorption spectroscopy Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- FUSNOPLQVRUIIM-UHFFFAOYSA-N 4-amino-2-(4,4-dimethyl-2-oxoimidazolidin-1-yl)-n-[3-(trifluoromethyl)phenyl]pyrimidine-5-carboxamide Chemical compound O=C1NC(C)(C)CN1C(N=C1N)=NC=C1C(=O)NC1=CC=CC(C(F)(F)F)=C1 FUSNOPLQVRUIIM-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
- 229940010552 ammonium molybdate Drugs 0.000 description 1
- 235000018660 ammonium molybdate Nutrition 0.000 description 1
- 239000011609 ammonium molybdate Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012493 hydrazine sulfate Substances 0.000 description 1
- 229910000377 hydrazine sulfate Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229940079827 sodium hydrogen sulfite Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は溶液循環型自動吸光分析方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a solution circulation type automatic absorption analysis method.
（従来の技術）
Ｐ、Ｍｎ、■、Ａ１等の分析方法として溶液Ｗｉ環型自
動吸光分析方法が広く知られているが、このような分析
方法においては、例えば、特開昭４８−３１９８７号に
開示されているように、測定そのものは自動的になされ
ても、有色イオン呈色域と発色域での吸光度測定が１回
ずつであるため時として誤差が発生し、分析値が不正確
になることがある。また、測定後の分析は主として人手
によることになり、結果として迅速性に欠ける等の欠点
をともなうものである。そこで、本出願人は予め吸光度
とイオン量の検量線を演算器に設定しておき、有色イオ
ン呈色域と発色域でそれぞれ複数回ずつ吸光度測定し、
それぞれの測定値の平均値を前記演算器へ導いて検量線
からイオン量を決定するようにした溶液循環型自動吸光
分析方法を開発し、特願昭６２−１５０７１０号として
先に出願したが、この方法は複数回測定した有色イオン
呈色域と発色域の吸光度測定値の平均値を求め、それぞ
れの平均値を演算器へ導入するようにしているため、異
常値の棄却検定基準の不統一などによって分析値に誤差
が生じ、また、完全な自動吸光分析とは言い難いもので
あった。(Prior art) A solution Wi ring type automatic absorption spectrometry method is widely known as an analysis method for P, Mn, ■, A1, etc.; As disclosed in , even though the measurement itself is performed automatically, the absorbance is measured once in the colored ion coloring region and once in the coloring region, so errors sometimes occur and the analytical values may be inaccurate. It may happen. Furthermore, analysis after measurement is mainly done manually, resulting in disadvantages such as a lack of speed. Therefore, the applicant presets a calibration curve of absorbance and ion amount in a calculator, and measures the absorbance multiple times each in the colored ion coloring region and the coloring region.
He developed a solution circulation type automatic absorption spectrometry method in which the average value of each measured value was guided to the above-mentioned calculator to determine the amount of ions from the calibration curve, and he filed an application earlier as Japanese Patent Application No. 150710/1986. In this method, the average value of the absorbance measurements of the colored ion color region and the color region measured multiple times is calculated, and each average value is introduced into the calculator, so there is no uniformity in the test criteria for rejecting abnormal values. Errors occurred in the analytical values due to such factors, and it could not be said to be a completely automatic absorption analysis.
（発明が解決しようとする課題）
本発明が解決しようとするところは前記のような欠点を
なくし、自動吸光分析の精度を高めるとともに分析所要
時間を短縮するところにある。(Problems to be Solved by the Invention) The present invention aims to eliminate the above-mentioned drawbacks, improve the precision of automatic absorption analysis, and shorten the time required for analysis.
（課題を解決するための手段）
本発明の溶液循環型自動吸光分析方法は、予め吸光度と
イオン量の検量線を演算器に設定しておき、有色イオン
呈色域と発色域でそれぞれ複数回ずつ吸光度測定し、そ
れぞれの測定値を前記演算器へ導いて異常値の棄却検定
を行った後平均値を算出し検量線からイオン量を決定す
ることを特徴とするものである。(Means for Solving the Problems) In the solution circulation type automatic absorption analysis method of the present invention, a calibration curve of absorbance and ion amount is set in advance in a calculator, and a plurality of calibration curves are set in advance in the colored ion coloring region and coloring region. The method is characterized in that the absorbance is measured for each sample, each measured value is led to the arithmetic unit, a test for rejecting abnormal values is performed, the average value is calculated, and the amount of ions is determined from the calibration curve.
本発明においては、まず、予め吸光度とイオン量との関
係を標準検量線として演算器へ設定しておき、実測定に
際しては、有色イオン呈色域と発色域でそれぞれ複数回
ずつ吸光度を測定する。つまり、従来この両域ではそれ
ぞれ１回ずつの測定にとどまっており、これが不正確な
分析結果の一因となっていることが明らかになったので
、有色イオン呈色域と発色域での吸光度測定をそれぞれ
複数回行い、それぞれの測定値の平均値を基準としよう
とするものであり、また、吸光度測定を複数回繰り返す
ことにより生ずる時間のロスは、測定後に行う分析を予
め吸光度とイオン量との関係を標準検量線として設定し
ておいた演算器で行って迅速化することにより解決した
ものである。すなわち、有色イオン呈色域では、例えば
、鋼中の不純物分析においては、Ｆｅ３＋→Ｆｅ２すの
還元作用が施され、呈色用溶液との攪拌、空気抜き等が
行われることから測定に異常値が出ることがあるので、
本発明においては、上記のごとくこの有色イオン呈色域
での吸光度測定を複数回行って測定値を逐次演算器へ導
いた後異常値をグラハスならびにデイクソン検定により
除いた値を平均化する。また、発色域においても発色用
溶液と試料溶液との攪拌が行われて前記有色イオン呈色
域での吸光度測定の場合と同様に測定に異常値が出るの
で、この発色域においても複数回吸光度測定し、有色イ
オン呈色域での吸光度測定の場合と同様な演算処理をし
た後、その平均値を上記有色イオン呈色域の測定平均値
とともに検量線と照合し、これによりイオン量を決定す
るものであって、これらのイオン量の決定は演算器にお
いて処理するため極めて迅速に測定結果に基く分析がで
き、複数回ずつ吸光度測定することにより生ずる時間の
ロスは補償される。なお、上記複数回の吸光度測定は多
い程正確な分析ができるが、測定時間等の関係から１回
／秒×５〜１０回位が適当であり、さらにまた、このよ
うな分析方法は、Ｐ、Ｍｎ、■、Ａ１、Ｓｉのほか従来
吸光度分析方法による各種の分析にを効に適用すること
ができる。In the present invention, first, the relationship between absorbance and ion amount is set in advance as a standard calibration curve in the calculator, and during actual measurement, the absorbance is measured multiple times each in the colored ion coloring region and the coloring region. . In other words, in the past, only one measurement was taken in each of these regions, and it became clear that this was a contributing factor to inaccurate analysis results. Each measurement is performed multiple times, and the average value of each measurement value is used as the standard.Also, to avoid time loss caused by repeating absorbance measurements multiple times, it is necessary to calculate the absorbance and ion content in advance for the analysis to be performed after the measurement. This problem was solved by speeding up the calculation by calculating the relationship between the two using a calculator that had been set as a standard calibration curve. That is, in the colored ion coloring region, for example, in the analysis of impurities in steel, the reduction action of Fe3+ → Fe2 is performed, stirring with the coloring solution, air removal, etc., so abnormal values may occur in the measurement. Because it may occur,
In the present invention, as described above, absorbance measurements in this colored ion coloring region are carried out a plurality of times, the measured values are sequentially led to a calculator, and then abnormal values are removed by Grahas and Dickson tests and the values are averaged. Also, in the coloring region, the coloring solution and the sample solution are stirred, and an abnormal value appears in the measurement as in the case of absorbance measurement in the colored ion coloring region, so the absorbance is measured multiple times in this coloring region. After measuring and performing the same calculation process as in the case of absorbance measurement in the colored ion coloring region, the average value is compared with the calibration curve along with the measured average value of the colored ion coloring region above, and the ion amount is determined from this. Since the determination of the amounts of these ions is processed in a computer, analysis based on the measurement results can be performed extremely quickly, and the time loss caused by measuring the absorbance multiple times can be compensated for. Note that the more times the absorbance is measured, the more accurate the analysis will be, but due to the measurement time, etc., it is appropriate to measure absorbance once per second x 5 to 10 times. , Mn, ■, A1, Si, and various other analyzes using conventional absorbance analysis methods.
次に、本発明方法の一例を図面により説明すれば、第１
図において（１）は試料溶液槽、（２）は反応槽、（３
ａ）、（３ｂ）、（３ｃ）、（３ｄ）、（３ｅ）はいず
れも試薬槽である。今、試料溶液槽（１）から試料溶液
を反応槽（２）へ導入する一方、試薬槽（３ａ）、（３
ｂ）、（３ｃ）、（３ｄ）、（３ｅ）から試薬を反応槽
（２）へ導き、ヒータ（４）で加熱しつつＦｅ３士をＦ
ｅ２＋へ還元した後、試料溶液（有色イオン）を空気吹
込管（５）からの空気吹込みによりフローセル（６）へ
循環移動させつつ、該フローセル（６）に発光体（７）
から発光し、ホトマル（８）で、有色イオン呈色域の吸
光度を複数回測定しその測定値を予め吸光度とイオン量
の標準検量線を設定しておいた演算器（９）へ導入し、
異常値を検定棄却した後平均値を演算する。次いで、試
薬槽（３ａ）、（３ｂ）、（３ｃ）、（３ｄ）、（３ｅ
）から発色試薬を反応槽（２）へ導いて発色イオンとし
、これを上記同様にフローセル（６）へ循環移動させつ
つ発光体（７）から発光し、ホトマル（８）で発光域の
吸光度を複数回測定し、前記演算器（９）へ導いてその
平均値を演算したうえその結果を前記有色イオン呈色域
の測定結果と合わせて演算し、この演算器（９）に予め
設定しである検量線からイオン量を決定し、その結果を
プリンターα０）へ表示する。Next, an example of the method of the present invention will be explained with reference to the drawings.
In the figure, (1) is the sample solution tank, (2) is the reaction tank, and (3) is the sample solution tank.
a), (3b), (3c), (3d), and (3e) are all reagent tanks. Now, while introducing the sample solution from the sample solution tank (1) into the reaction tank (2), the reagent tanks (3a) and (3
The reagents from b), (3c), (3d), and (3e) are led to the reaction tank (2), and the Fe3 is heated with the heater (4).
After being reduced to e2+, the sample solution (colored ions) is circulated to the flow cell (6) by air blowing from the air blowing tube (5), and a luminescent material (7) is placed in the flow cell (6).
The absorbance of the colored ion color range is measured multiple times using a photomultiplier (8), and the measured values are introduced into a calculator (9) in which a standard calibration curve of absorbance and ion amount has been set in advance.
After rejecting abnormal values, calculate the average value. Next, reagent tanks (3a), (3b), (3c), (3d), (3e
), the coloring reagent is led to the reaction tank (2) to form coloring ions, which are circulated to the flow cell (6) in the same manner as above, emitted from the luminescent body (7), and the absorbance of the luminescent region is measured with the photomul (8). The measurement is carried out multiple times, the average value is calculated by guiding the measurement to the arithmetic unit (9), the result is calculated together with the measurement result of the colored ion coloring region, and the result is set in advance in this arithmetic unit (9). The amount of ions is determined from a certain calibration curve, and the results are displayed on the printer α0).
（実施例） 次に本発明の実施例を比較例とともに挙げる。(Example) Next, examples of the present invention will be listed together with comparative examples.
（鋼中Ｐの分析例）
鋼の切削試料０．１ｇを硝酸５ｃｃ、過塩素酸（６０％
）６ｃｃを加えて加熱溶解し、白煙処理をして過塩素酸
の残量をｌ ｃｃ以下にする。これに水を加えて塩類を
溶解したのち、全容を正確に２５ ｃｃとしてこれを試
料溶液とする。次に、上記試料溶液を反応槽に移し、亜
硫酸水素すｌ−ＩＪウム溶液（２０％）１０ｃｃを加え
、Ｆｅ３？をＦ ｅ Ｚ＋ ヘ還元した後、ニッケル、
クロム等による有色イオンの吸光度を測定間隔１回／秒
で５回測定したところ、このときの吸光度（Ａ）は、０
．００７．０００７．０、００６．０．０１０、Ｏ，Ｏ
Ｏ７であった。(Example of analysis of P in steel) 0.1 g of cut steel sample was mixed with 5 cc of nitric acid and perchloric acid (60%
) Add 6 cc of perchloric acid, heat and dissolve, and treat with white smoke to reduce the remaining amount of perchloric acid to less than 1 cc. After adding water to dissolve the salts, the total volume is adjusted to exactly 25 cc, and this is used as the sample solution. Next, the above sample solution was transferred to a reaction tank, 10 cc of sodium hydrogen sulfite solution (20%) was added, and Fe3? After reducing to Fe Z+, nickel,
When the absorbance of colored ions such as chromium was measured 5 times at a measurement interval of 1 time/sec, the absorbance (A) at this time was 0.
．． 007.0007.0, 006.0.010, O, O
It was O7.
次いで、発色試薬としてモリブデン酸アンモニウム（２
，５％）１０ｃｃと、硫酸ヒドラジン溶液（３％）１４
ｃｃを加え、呈色が完結したのち吸光度を測定間隔１回
／秒で５回測定したところ、このときの吸光度（Ｂ）は
０．０５０．０．０５０．０．０５８．０．０５１．０
．０５５であった。ところで、一般に溶液循環型の自動
吸光分析においては反応槽と吸光度測定セル間を通気に
よって循環する方式をとっているため、この際に気泡の
まき込みによって発生頻度３凹／２５回程度で異常値を
示すことがあるが、グラハスならびにデイクソン検定に
より異常値を除いた値を平均し、弐Ｂ−ＡＫ （Ｋ−液
量補正係数）で演算した値（補正吸光度）を、予め検量
線を設定しである演算器へ導き、Ｐ＝ １９．５μｇ／
ｇ と決定した。Next, ammonium molybdate (2
, 5%) 10cc and hydrazine sulfate solution (3%) 14
cc was added and after the color development was completed, the absorbance was measured 5 times at a measurement interval of 1 time/second, and the absorbance (B) at this time was 0.050.0.050.0.058.0.051.0
．． It was 055. By the way, in general, in solution circulation type automatic absorption analysis, a method is used in which circulation is carried out between the reaction tank and the absorbance measurement cell by ventilation, so abnormal values may occur at a frequency of about 3 dents/25 times due to the inclusion of air bubbles. However, by averaging the values after removing abnormal values using the Grahas and Dickson tests, and calculating the value (corrected absorbance) using 2B-AK (K - liquid volume correction coefficient), set a calibration curve in advance. P = 19.5μg/
It was decided that g.
（比較例）
上記実施例と同条件の有色イオン呈色域で１回吸光度測
定した測定値である吸光度（Ａ）＝Ｏ１００７と、発色
域で１回吸光度測定した測定値である吸光度（Ｂ）−〇
、０５０を前記式で演算しこの値を予め定めた検量線か
らＰ ＝ １９．３μｇ／ｇと決定した。(Comparative example) Absorbance (A) = O1007, which is the measured value obtained by measuring the absorbance once in the colored ion coloring region under the same conditions as in the above example, and Absorbance (B), which is the measured value obtained by measuring the absorbance once in the colored ion region -0,050 was calculated using the above formula, and this value was determined to be P = 19.3 μg/g from a predetermined calibration curve.
このようにして同一鋼中のＰを実施例、比較例それぞれ
１０回分析した結果、下表のごとく本発明における分析
においてはバラツキが少なく、精度を向上させることが
できた。As a result of analyzing P in the same steel 10 times in each of the examples and comparative examples, as shown in the table below, the analysis according to the present invention had little variation and was able to improve accuracy.
標準値２０．０ｐｐｍ
（発明の効果）
本発明は前記説明から明らかなように、有色イオン呈色
域と発色域での吸光度測定値はそれぞれ複数回の測定値
を演算器に導入し〜異常値を検定棄却後平均値を演算し
、測定後の分析は予め吸光度とイオン量の検量線を設定
しである演算器で行うことにより、分析精度を向上させ
て自動分析を極微量域まで適用可能とするとともに一連
の分析所要時間を短縮することができ、しかも、異常値
の棄却検定を演算器で行うため、測定回数を変更した場
合等に生じる棄却検定中の変動もその変動に対応するデ
ータを演算器に設定することにより容易に対処でき、ま
た演算器により平均値を演算するため、測定元素による
測定回数の変動にも容易に対処できることとなり、吸光
分析の自動化をより進めることができるもので、従来の
溶液循環型自動吸光分析方法の問題点を解決したものと
して業界の発展に寄与するところ大なものである。Standard value: 20.0 ppm (Effects of the invention) As is clear from the above description, the present invention allows absorbance measurement values in the colored ion coloring region and the coloring region to be calculated by introducing a plurality of measured values into an arithmetic unit. After the test is rejected, the average value is calculated, and the analysis after measurement is performed using a calculator with a calibration curve of absorbance and ion amount set in advance. This improves analysis accuracy and allows automatic analysis to be applied down to the extremely trace amount range. In addition, the time required for a series of analyzes can be shortened, and since the rejection test for abnormal values is performed using a calculator, fluctuations during the rejection test that occur when the number of measurements is changed can also be processed using data corresponding to the fluctuations. can be easily dealt with by setting it in the calculator, and since the average value is calculated by the calculator, it is also possible to easily deal with fluctuations in the number of measurements depending on the measured element, making it possible to further automate absorption analysis. Therefore, it will greatly contribute to the development of the industry as it solves the problems of the conventional solution circulation type automatic absorption analysis method.
第１図は本発明方法を実施するだめの装置の１例を示す
説明図である。FIG. 1 is an explanatory diagram showing an example of an apparatus for carrying out the method of the present invention.
Claims (1)
、有色イオン呈色域と発色域でそれぞれ複数回ずつ吸光
度測定し、それぞれの測定値を前記演算器へ導いて異常
値の棄却検定を行った後平均値を算出し検量線からイオ
ン量を決定することを特徴とする溶液循環型自動吸光分
析方法。A calibration curve of absorbance and ion amount is set in the calculator in advance, and the absorbance is measured multiple times in the colored ion coloring region and the coloring region, and each measured value is led to the calculator to test for rejection of abnormal values. A solution circulation type automatic absorption analysis method characterized by calculating an average value after performing the above steps and determining the amount of ions from a calibration curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20283688A JPH0252240A (en) | 1988-08-15 | 1988-08-15 | Solution circulation type automatic absorption analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20283688A JPH0252240A (en) | 1988-08-15 | 1988-08-15 | Solution circulation type automatic absorption analysis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0252240A true JPH0252240A (en) | 1990-02-21 |
Family
ID=16463995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20283688A Pending JPH0252240A (en) | 1988-08-15 | 1988-08-15 | Solution circulation type automatic absorption analysis |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0252240A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04127058A (en) * | 1990-09-19 | 1992-04-28 | Nippon Steel Corp | Method and apparatus for automatically analyzing acid value and saponification value of oil |
| JPH0921744A (en) * | 1995-07-06 | 1997-01-21 | Nec Corp | Cell for spectrometer |
| CN103398965A (en) * | 2013-08-19 | 2013-11-20 | 济宁利特纳米技术有限责任公司 | Method for detecting manganese content in graphene oxide and graphene samples |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831987A (en) * | 1971-08-27 | 1973-04-26 | ||
| JPS56150334A (en) * | 1980-04-23 | 1981-11-20 | Olympus Optical Co Ltd | Detection for abnormal value in turbidimetric analysis |
| JPS57171247A (en) * | 1981-03-30 | 1982-10-21 | Siemens Ag | Analyzer for copper content in waste liquid |
-
1988
- 1988-08-15 JP JP20283688A patent/JPH0252240A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4831987A (en) * | 1971-08-27 | 1973-04-26 | ||
| JPS56150334A (en) * | 1980-04-23 | 1981-11-20 | Olympus Optical Co Ltd | Detection for abnormal value in turbidimetric analysis |
| JPS57171247A (en) * | 1981-03-30 | 1982-10-21 | Siemens Ag | Analyzer for copper content in waste liquid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04127058A (en) * | 1990-09-19 | 1992-04-28 | Nippon Steel Corp | Method and apparatus for automatically analyzing acid value and saponification value of oil |
| JPH0921744A (en) * | 1995-07-06 | 1997-01-21 | Nec Corp | Cell for spectrometer |
| CN103398965A (en) * | 2013-08-19 | 2013-11-20 | 济宁利特纳米技术有限责任公司 | Method for detecting manganese content in graphene oxide and graphene samples |
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