JP3139818B2 - Verification method of accuracy in moisture determination of solids - Google Patents
Verification method of accuracy in moisture determination of solidsInfo
- Publication number
- JP3139818B2 JP3139818B2 JP04074213A JP7421392A JP3139818B2 JP 3139818 B2 JP3139818 B2 JP 3139818B2 JP 04074213 A JP04074213 A JP 04074213A JP 7421392 A JP7421392 A JP 7421392A JP 3139818 B2 JP3139818 B2 JP 3139818B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- solid
- crystallization
- substance
- heating
- 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 - Fee Related
Links
- 239000007787 solid Substances 0.000 title claims description 31
- 238000000034 method Methods 0.000 title claims description 29
- 238000012795 verification Methods 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- 238000002425 crystallisation Methods 0.000 claims description 23
- 230000008025 crystallization Effects 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 13
- 229910052717 sulfur Inorganic materials 0.000 claims description 13
- 239000011593 sulfur Substances 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 claims description 6
- 229910001626 barium chloride Inorganic materials 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 claims description 4
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 4
- 239000001433 sodium tartrate Substances 0.000 claims description 4
- 229960002167 sodium tartrate Drugs 0.000 claims description 4
- 235000011004 sodium tartrates Nutrition 0.000 claims description 4
- 229940045511 barium chloride Drugs 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 239000001307 helium Substances 0.000 claims description 2
- 229910052734 helium Inorganic materials 0.000 claims description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 2
- 238000004448 titration Methods 0.000 description 9
- 239000002904 solvent Substances 0.000 description 8
- 238000005443 coulometric titration Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 238000003869 coulometry Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、固体の水分定量におけ
る正確さの検証方法に関するもので、詳細には、例えば
硫黄中の数十ｐｐｍ程度の水分が正しく定量できること
の検証方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for verifying accuracy in the determination of moisture in solids, and more particularly to a method for verifying that, for example, about tens of ppm of water in sulfur can be correctly determined. .
【０００２】[0002]
【従来の技術】従来より、固体の水分を測定する方法と
しては、 重量法により測定する方法がある。この方法は、固体
試料を乾燥器中で加熱後、重量減少分を水分として定量
する方法である。 カールフィッシャー電量滴定法では、固体試料例えば
硫黄を水分抽出用の溶媒中に投入し、抽出された水分を
ヨウ素と反応させ、ヨウ化物を電解酸化してヨウ素を発
生させ電量滴定する。2. Description of the Related Art Conventionally, as a method of measuring the water content of a solid, there is a method of measuring by a gravimetric method. This method is a method in which a solid sample is heated in a dryer, and then the weight loss is determined as moisture. In the Karl Fischer coulometric titration method, a solid sample, for example, sulfur is put into a solvent for extracting water, the extracted water is reacted with iodine, and iodide is electrolytically oxidized to generate iodine and coulometrically titrated.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の固体の水分定量方法によると、固体が硫黄の
場合、前記の重量減量法によると、加熱温度が６０℃
と低く、硫黄中の水分を完全には追い出せない可能性が
ある。また、更に温度を上昇すると硫黄自体がＳＯ2 と
して揮散するため、正確な定量が困難であるという問題
がある。However, according to such a conventional solid content moisture determination method, when the solid is sulfur, the heating temperature is 60 ° C. according to the weight loss method described above.
Therefore, the water in sulfur may not be completely removed. Further, when the temperature is further increased, sulfur itself is volatilized as SO 2 , so that there is a problem that accurate quantification is difficult.
【０００４】前記のカールフィッシャー電量滴定法に
よると、硫黄が塊状の場合、塊の内部の水分は抽出する
ことは難しい。また硫黄が粉末の場合、溶媒との親和性
が悪く固体が溶媒上部に浮いてしまい、測定操作が困難
であるという問題がある。さらには、前記とのいず
れの方法によっても数１０ｐｐｍ程度の微量の水分定量
をすることはできない。According to the Karl Fischer coulometric titration method, when sulfur is in a lump, it is difficult to extract water inside the lump. Further, when sulfur is a powder, there is a problem that the affinity for the solvent is poor and the solid floats on the solvent, making the measurement operation difficult. Further, it is not possible to determine a trace amount of water of about several tens ppm by any of the above methods.
【０００５】本発明は、このような微量の水分を正確に
測定することができたかどうかの検証方法を提供するこ
とを目的とする。[0005] It is an object of the present invention to provide a method for verifying whether or not such a small amount of water has been accurately measured.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決するため
の本発明による固体の水分定量における正確さの検証方
法は、固体を不活性ガス気流中で加熱し、溶融状態とし
て水分を追い出す固体の水分定量方法において、この方
法による定量値が正しいことの証明に水または結晶水を
もつ物質を固体と共に加熱し、水または結晶水の回収量
により確認することを特徴とする。According to the present invention, there is provided a method for verifying accuracy in the determination of water content of a solid, which comprises heating the solid in a stream of inert gas to remove the water in a molten state. In the moisture determination method, a substance having water or water of crystallization is heated together with a solid to prove that the quantitative value obtained by this method is correct, and the water or the amount of water of crystallization is confirmed.
【０００７】水または結晶水をもつ物質と固体の加熱温
度が１２０〜２００℃の範囲であることを特徴とする。
結晶水をもつ物質は、その結晶水を加熱除去できる温度
が８０〜２５０℃の範囲であることを特徴とする。結晶
水をもつ物質は、塩化バリウム、酒石酸ナトリウムおよ
びクエン酸３ナトリウム２水和物であることを特徴とす
る。The heating temperature of the substance having water or water of crystallization and the solid is in the range of 120 to 200 ° C.
A substance having water of crystallization is characterized in that the temperature at which the water of crystallization can be removed by heating is in the range of 80 to 250 ° C. The substance with water of crystallization is characterized by barium chloride, sodium tartrate and trisodium citrate dihydrate.
【０００８】固体が硫黄であることを特徴とする。不活
性ガスとしてアルゴン、窒素またはヘリウムの少なくと
もいずれか１種を用いることを特徴とする。[0008] It is characterized in that the solid is sulfur. At least one of argon, nitrogen and helium is used as the inert gas.
【０００９】[0009]
【作用】結晶水をもつ物質と固体を不活性ガス気流中で
温度１２０〜２００℃に加熱し、一定時間保持すること
で、結晶水と固体中の水分を完全に溶媒中に抽出でき
る。したがって、固体中の水分が正確に定量できたか否
かの判断が可能である。By heating a substance having water of crystallization and a solid to a temperature of 120 to 200 ° C. in an inert gas stream and keeping it for a certain period of time, water of crystallization and water in the solid can be completely extracted into the solvent. Therefore, it is possible to determine whether or not the moisture in the solid has been accurately determined.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。まず、固体の水分定量装置を図１に示す。図１
は、水分抽出装置１を示す。図１において、１は、加熱
気化装置を示す。試料ボート３の中に結晶水をもつ物質
と固体を導入し、これを加熱炉２に挿入する。この加熱
炉２の炉内を温度１２０〜２００℃に加熱し、結晶水お
よび固体中の水分を気化させて、パイプ４を介して滴定
セル５内の溶媒に抽出する。Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 shows a solid moisture determination device. FIG.
Indicates a water extraction device 1. In FIG. 1, reference numeral 1 denotes a heating vaporizer. A substance having crystallization water and a solid are introduced into the sample boat 3 and inserted into the heating furnace 2. The inside of the heating furnace 2 is heated to a temperature of 120 to 200 ° C. to vaporize water of crystallization and solids and extract the solvent in the titration cell 5 through the pipe 4.
【００１１】滴定セル５の詳細を図２および図３に示
す。滴定セル５内には、あらかじめ試料投入栓６より例
えば、メタノール、クロロホルム、ピリジン等の市販の
溶媒を導入しておく。そして、図１に示すパイプ４に連
結される入口管７より容器８内の溶媒中に水分を導入す
る。次に定量操作は次のとおりである。滴定セル５内の
水分をあらかじめ滴定して０にする。加熱気化装置１中
の試料ボート３に結晶水をもつ物質と固体を入れ、窒素
パージしながら温度１４０℃に加熱し、固体を溶融状態
とし、約１０分間保持して、水分を溶媒に抽出する。抽
出された水分を滴定する。得られた滴定値より固体中の
水分量を算出する。Details of the titration cell 5 are shown in FIGS. In the titration cell 5, a commercially available solvent such as methanol, chloroform, pyridine or the like is introduced in advance from the sample insertion stopper 6. Then, water is introduced into the solvent in the container 8 from the inlet pipe 7 connected to the pipe 4 shown in FIG. Next, the quantitative operation is as follows. The water in the titration cell 5 is previously titrated to zero. A substance having water of crystallization and a solid are put in a sample boat 3 in a heating vaporizer 1 and heated to a temperature of 140 ° C. while purging with nitrogen, and the solid is melted, held for about 10 minutes, and water is extracted into a solvent. . Titrate the extracted water. The amount of water in the solid is calculated from the obtained titration value.
【００１２】実験例 １ 実験例１は、結晶水をもつ物質中の結晶水の回収量を検
討した結果である。結晶水をもつ物質として、その結晶
水を加熱除去できる温度は８０〜２５０℃である物質を
用いることが望ましい。例えば、塩化バリウム、酒石酸
ナトリウム、クエン酸３ナトリウム２水和物等である。Experimental Example 1 Experimental Example 1 is a result of examining the amount of crystallization water recovered in a substance having crystallization water. As the substance having water of crystallization, it is desirable to use a substance whose temperature at which the water of crystallization can be removed by heating is 80 to 250 ° C. For example, barium chloride, sodium tartrate, trisodium citrate dihydrate, and the like.
【００１３】結晶水をもつ物質の選定は、温度１２０〜
２００℃で結晶水が１００％回収できる次の化合物が適
当である。塩化バリウム（ＢａＣｌ2 ・２Ｈ2 Ｏ）、
酒石酸ナトリウム（Ｎａ2 Ｃ4 Ｈ4 Ｏ6 ・２Ｈ2
Ｏ）、クエン酸３ナトリウム２水和物（Ｎａ3 Ｃ6 Ｈ
5 Ｏ7 ・２Ｈ2 Ｏ）である。以下、塩化バリウムを用い
た実験条件は、硫黄中の水分定量法と同じ条件で実施し
た。回収実験結果を表１に示す。The substance having water of crystallization is selected at a temperature of 120 to
The following compounds that can recover 100% of water of crystallization at 200 ° C. are suitable. Barium chloride (BaCl 2 .2H 2 O),
Sodium tartrate (Na 2 C 4 H 4 O 6 · 2H 2
O), trisodium citrate dihydrate (Na 3 C 6 H
5 O 7 · 2H is a 2 O). Hereinafter, the experimental conditions using barium chloride were carried out under the same conditions as those for the method for determining water in sulfur. Table 1 shows the results of the recovery experiment.
【００１４】[0014]
【表１】 実験例 ２ 実験例２は、硫黄と塩化バリウム共存下での結晶水を回
収することにより、前記固体の水分定量方法が正しいこ
とを検証する例である。回収量の実験結果を表２に示
す。[Table 1] Experimental Example 2 Experimental example 2 is an example in which the water of crystallization in the coexistence of sulfur and barium chloride is recovered to verify that the method for determining the water content of the solid is correct. Table 2 shows the experimental results of the recovered amount.
【００１５】[0015]
【表２】 表２の結果より、硫黄中の水分は数ｐｐｍ以下であるこ
とが推定された。 実験例 ３ 実験例３は、硫黄と水分共存下での水を回収することに
より、前記固体の水分定量方法が正しいことを検証する
例である。回収量の実験結果を表３に示す。[Table 2] From the results in Table 2, it was estimated that the moisture in the sulfur was several ppm or less. Experimental Example 3 Experimental example 3 is an example in which water in the coexistence of sulfur and water is recovered to verify that the method for determining the water content of the solid is correct. Table 3 shows the experimental results of the recovered amount.
【００１６】[0016]
【表３】 次に、本発明の実施例で用いた電量滴定法について説明
する。図３および図４は、本発明の実施例で用いた電量
滴定装置と電量滴定セルの一例を示す。電量滴定セル
は、陽極液室１１と陰極液室１２の２室からなり、両室
１１、１２はセラミックスあるいはイオン交換樹脂等の
隔膜１３により分離される。この隔膜１３には、電解
時、陽極液と陰極液が混合せず、かつ電気抵抗の小さい
ものが用いられる。陽極液室１１、陰極液室１２は、そ
れぞれ電解電極１５と滴定の終点を求める指示電極をも
っている。大気開放部には、シリカゲル等を充填した乾
燥管１８を有している。[Table 3] Next, the coulometric titration method used in the examples of the present invention will be described. 3 and 4 show an example of a coulometric titrator and a coulometric cell used in an embodiment of the present invention. The coulometric titration cell is composed of two chambers, an anolyte chamber 11 and a catholyte chamber 12, and both chambers 11 and 12 are separated by a diaphragm 13 made of ceramic or ion exchange resin. As the diaphragm 13, a material which does not mix the anolyte and the catholyte during electrolysis and has a small electric resistance is used. The anolyte compartment 11 and the catholyte compartment 12 each have an electrolytic electrode 15 and an indicator electrode for determining the end point of the titration. A drying tube 18 filled with silica gel or the like is provided in the atmosphere opening portion.
【００１７】図４に示す各部は次の機能を有する。 分極電流検出部２０：指示電極に直流または交流電源よ
り定電圧または定電流を加え、指示電極管の微小電流ま
たは微小電圧変化を増幅して終点を検出する。 電流制御部２１：検出増幅部からの信号を受けて終点近
くで電解電流を断続または漸減して電解を制御する。Each section shown in FIG. 4 has the following functions. Polarization current detection unit 20: A constant voltage or constant current is applied to the indicator electrode from a DC or AC power supply, and the minute current or minute voltage change of the indicator electrode tube is amplified to detect the end point. Current control unit 21: Controlling the electrolysis by intermittently or gradually decreasing the electrolysis current near the end point in response to the signal from the detection amplification unit.
【００１８】電解電流電源２２：定電流（１０７．１ｍ
Ａまたはその倍数）または可変電流（０〜５００ｍＡ）
電源である。 終点検出表示部２３：検出増幅部からの信号を受けて分
極電圧または電流が設定された終点値になったとき、測
定終了を表示する。 電流積算部２４：滴定に要した電流を積算して電気量ま
たは水分量（μｇＨ2Ｏ）を表示する。Electrolytic current power supply 22: constant current (107.1 m
A or its multiple) or variable current (0-500 mA)
Power supply. End point detection display section 23: When the polarization voltage or current reaches the set end point value in response to the signal from the detection amplification section, the end of measurement is displayed. Current integration unit 24: integrates the current required for titration and displays the amount of electricity or the amount of water (μg H 2 O).
【００１９】[0019]
【発明の効果】以上説明したように、本発明による固体
の水分定量における正確さの検証方法によると、固体を
溶融状態にして検出された固体中の水分量の正確さを容
易かつ的確に検証することができるという効果がある。As described above, according to the method for verifying the accuracy in the determination of water content of a solid according to the present invention, the accuracy of the water content in a solid detected in a molten state can be easily and accurately verified. There is an effect that can be.
【図１】本発明の加熱気化装置を示す概略模式図であ
る。FIG. 1 is a schematic diagram showing a heating vaporizer of the present invention.
【図２】滴定セルを示す概略斜視図である。FIG. 2 is a schematic perspective view showing a titration cell.
【図３】滴定セルを示す概略構成図である。FIG. 3 is a schematic configuration diagram showing a titration cell.
【図４】滴定装置を示す概略構成図である。FIG. 4 is a schematic configuration diagram showing a titrator.
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 25/56 G01N 1/22 G01N 31/00 G01N 31/12 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) G01N 25/56 G01N 1/22 G01N 31/00 G01N 31/12
Claims (6)
状態として水分を追い出す固体の水分定量方法におい
て、この方法による定量値が正しいことの証明に水また
は結晶水をもつ物質を固体と共に加熱し、水または結晶
水の回収量により確認することを特徴とする固体の水分
定量における正確さの検証方法。1. A method for determining the moisture content of a solid in which a solid is heated in a stream of an inert gas to expel moisture in a molten state. A method for verifying accuracy in the determination of water content of a solid, characterized by heating and confirming the recovered amount of water or water of crystallization.
の加熱温度が１２０〜２００℃の範囲であることを特徴
とする請求項１記載の固体の水分定量における正確さの
検証方法。2. The method according to claim 1, wherein the heating temperature of the solid and the substance having water or water of crystallization is in the range of 120 to 200 ° C.
除去できる温度が８０〜２５０℃の範囲であることを特
徴とする請求項１記載の固体の水分定量における正確さ
の検証方法。3. The method according to claim 1, wherein the substance having water of crystallization has a temperature at which the water of crystallization can be removed by heating in the range of 80 to 250 ° C.
石酸ナトリウムおよびクエン酸３ナトリウム２水和物で
あることを特徴とする請求項１記載の固体の水分定量に
おける正確さの検証方法。4. The method according to claim 1, wherein the substance having water of crystallization is barium chloride, sodium tartrate and trisodium citrate dihydrate.
項１記載の固体の水分定量における正確さの検証方法。5. The method according to claim 1, wherein the solid is sulfur.
ヘリウムの少なくともいずれか１種を用いることを特徴
とする請求項１記載の固体の水分定量における正確さの
検証方法。6. The method according to claim 1, wherein at least one of argon, nitrogen, and helium is used as the inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04074213A JP3139818B2 (en) | 1992-03-30 | 1992-03-30 | Verification method of accuracy in moisture determination of solids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04074213A JP3139818B2 (en) | 1992-03-30 | 1992-03-30 | Verification method of accuracy in moisture determination of solids |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05281121A JPH05281121A (en) | 1993-10-29 |
| JP3139818B2 true JP3139818B2 (en) | 2001-03-05 |
Family
ID=13540692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04074213A Expired - Fee Related JP3139818B2 (en) | 1992-03-30 | 1992-03-30 | Verification method of accuracy in moisture determination of solids |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3139818B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7173839B2 (en) | 2004-06-14 | 2007-02-06 | Samsung Electronics Co., Ltd. | Large scale integrated circuit and at speed test method thereof |
| CN102692357A (en) * | 2012-06-06 | 2012-09-26 | 中粮生物化学（安徽）股份有限公司 | Quantitative analysis method for calcium sulphate crystal |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4784032B2 (en) * | 2001-07-06 | 2011-09-28 | 東ソー株式会社 | Apparatus for quantitative analysis of moisture in sodium bicarbonate and method for quantitative analysis thereof |
| JP5633158B2 (en) | 2010-03-01 | 2014-12-03 | セントラル硝子株式会社 | Method and apparatus for measuring moisture content in compounds containing hydrogen fluoride |
-
1992
- 1992-03-30 JP JP04074213A patent/JP3139818B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7173839B2 (en) | 2004-06-14 | 2007-02-06 | Samsung Electronics Co., Ltd. | Large scale integrated circuit and at speed test method thereof |
| CN102692357A (en) * | 2012-06-06 | 2012-09-26 | 中粮生物化学（安徽）股份有限公司 | Quantitative analysis method for calcium sulphate crystal |
| CN102692357B (en) * | 2012-06-06 | 2013-11-20 | 中粮生物化学（安徽）股份有限公司 | Quantitative analysis method for calcium sulphate crystal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05281121A (en) | 1993-10-29 |
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