JP3182443B2 - Amosite discrimination method in calcium silicate insulation - Google Patents
Amosite discrimination method in calcium silicate insulationInfo
- Publication number
- JP3182443B2 JP3182443B2 JP03323292A JP3323292A JP3182443B2 JP 3182443 B2 JP3182443 B2 JP 3182443B2 JP 03323292 A JP03323292 A JP 03323292A JP 3323292 A JP3323292 A JP 3323292A JP 3182443 B2 JP3182443 B2 JP 3182443B2
- Authority
- JP
- Japan
- Prior art keywords
- amosite
- calcium silicate
- heat insulating
- insulating material
- absence
- 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 - Lifetime
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、配管の保温材等に広く
使用されている珪酸カルシウム保温材中にアスベスト、
特にアモサイトが含有されているか、否かを迅速に判別
するための方法に関するものである。BACKGROUND OF THE INVENTION The present invention relates to a calcium silicate insulation material widely used as an insulation material for pipes and the like.
In particular, the present invention relates to a method for quickly determining whether or not amosite is contained.
【０００２】[0002]
【従来の技術】最近、アスベストの健康への影響がしば
しば議論されるようになり、これに伴って製品中のアス
ベストの有無の判別方法が重要となっている。珪酸カル
シウム保温材においても、既存保温材中にアスベスト、
特に、アモサイトが使用されているか、否かの判別を施
工現場において時間を掛けず、かつ簡易に判別できる方
法が必要とされている。2. Description of the Related Art Recently, the influence of asbestos on health has been frequently discussed, and accordingly, a method of determining the presence or absence of asbestos in a product has become important. As for calcium silicate insulation, asbestos,
In particular, there is a need for a method that can easily determine whether amosite is used or not at a construction site without taking much time.
【０００３】一般的に製品中にアスベストが使用されて
いるか、否かの判別方法としては、Ｘ線回折法、顕微鏡
観察(偏光顕微鏡、電子顕微鏡等)ないしこれらを併用す
る方法が広く用いられている。しかし、これらの方法は
いずれも特定の装置を必要とする上、Ｘ線回折法におい
ては有資格者をＸ線作業主任者として選任する必要があ
る。また、顕微鏡観察については観察技術を習得する必
要があることから、上記目的にはそぐわない。In general, as a method for determining whether or not asbestos is used in a product, X-ray diffraction, microscopic observation (polarizing microscope, electron microscope, etc.) or a method using both of them are widely used. I have. However, each of these methods requires a specific device, and in the X-ray diffraction method, a qualified person needs to be appointed as a chief of the X-ray work. In addition, microscopic observation is not suitable for the above-mentioned purpose because it is necessary to learn an observation technique.
【０００４】また、化学分析を用いる方法も利用されて
いる(例えば、E-C APPARATUSCORPORATION製、Asbestes
t)。この方法で、アモサイトを分析する場合、まず、試
料を所定の容器にセットし、次いで、酸処理を行い、次
いで、これを蒸留水で洗浄し、更に、これをフッ化水素
酸処理し、呈色液を滴下して呈色反応を調べ、アモサイ
トの有無を判別する方法であって、極めて煩雑であるた
め、施工現場での簡易判別方法としては必ずしも十分で
はない。A method using chemical analysis is also used (for example, Asbestes manufactured by EC APPARATUSCORPORATION).
t). In the case of analyzing amosite by this method, first, a sample is set in a predetermined container, then subjected to an acid treatment, and then washed with distilled water, and further treated with hydrofluoric acid to be presented. This is a method for determining the presence or absence of amosite by examining a color reaction by dropping a color liquid and is extremely complicated, so that it is not always sufficient as a simple determination method at a construction site.
【０００５】上述のようなアスベスト分析手法は広範囲
の材料を対象としているため、前記の通り特殊な装置を
使用したり、方法が複雑であったり、時間が掛かるなど
の問題があり、迅速かつ容易な判別方法としては適さな
い。[0005] Since the above-mentioned asbestos analysis method covers a wide range of materials, there are problems such as the use of special equipment, the complexity of the method and the time required as described above. It is not suitable as a simple determination method.
【０００６】従って、本発明の目的は、珪酸カルシウム
保温材中のアモサイトの有無の判別を迅速かつ容易に行
うための方法を提供することにある。Accordingly, an object of the present invention is to provide a method for quickly and easily determining the presence or absence of amosite in a calcium silicate heat insulating material.
【０００７】[0007]
【課題を解決するための手段】本発明者らは上記課題を
解決すべく鋭意研究の結果、珪酸カルシウム保温材の原
料は、石灰質原料と、珪酸質原料と、補強繊維からなっ
ており、補強繊維としてアスベストが使用される場合、
アスベストの種類は特性の面からアモサイトに限定さ
れ、このアモサイトは(Ｍｇ,Ｆｅ)7Ｓｉ8Ｏ22(ＯＨ)2の
化学式を有し、ＭｇとＦｅのモル比はおよそＭｇ：Ｆｅ
＝１.５：５.５であり、比較的多量に鉄分を含有するこ
とに着目し、本発明を完成するに至った。Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, the raw materials of the calcium silicate heat insulating material are composed of calcareous raw materials, silicate raw materials, and reinforcing fibers. When asbestos is used as a fiber,
The type of asbestos is limited to amosite in terms of characteristics, and this amosite has a chemical formula of (Mg, Fe) 7 Si 8 O 22 (OH) 2 , and the molar ratio of Mg to Fe is about Mg: Fe.
= 1.5: 5.5, paying attention to the fact that iron is contained in a relatively large amount, and completed the present invention.
【０００８】すなわち、本発明は、石灰質原料と、珪酸
質原料と、補強繊維とから成形された珪酸カルシウム保
温材中に補強繊維として使用されているアモサイトの有
無を判別するための方法において、判別を行う珪酸カル
シウム保温材に特定の酸並びに呈色剤を滴下し、アモサ
イト中の鉄分の呈色反応によりアモサイトの有無を判別
する方法を提供することにある。That is, the present invention provides a method for determining the presence or absence of amosite used as a reinforcing fiber in a calcium silicate heat insulating material formed from a calcareous raw material, a siliceous raw material, and a reinforcing fiber. The present invention is to provide a method for determining the presence or absence of amosite by a color reaction of iron in amosite by dropping a specific acid and a coloring agent onto a calcium silicate heat insulating material.
【０００９】更に、本発明は、石灰質原料と、珪酸質原
料と、補強繊維とから成形された珪酸カルシウム保温材
中に補強繊維として使用されているアモサイトの有無を
判別するための方法において、判別を行う珪酸カルシウ
ム保温材の粉粒状供試体に特定の酸並びに呈色剤を滴下
し、アモサイト中の鉄分の呈色反応によりアモサイトの
有無を判別する方法を提供することにある。Further, the present invention provides a method for determining the presence or absence of amosite used as a reinforcing fiber in a calcium silicate heat insulating material formed from a calcareous raw material, a siliceous raw material, and a reinforcing fiber. The present invention provides a method for determining the presence or absence of amosite by a color reaction of iron in amosite by dropping a specific acid and a colorant onto a powdery and granular specimen of a calcium silicate heat insulating material.
【００１０】[0010]
【作用】以下、本発明方法について詳述する。本発明の
珪酸カルシウム保温材中のアモサイトの有無を判別する
方法は、アスベストの主要用途の一つであった珪酸カル
シウム保温材中のアモサイトの有無の判別を迅速かつ容
易に行うものであり、化学分析手法を応用したものであ
る。すなわち、判別の対象を珪酸カルシウム保温材に限
定することにより、煩雑な前処理等が全て省略可能とな
った。Hereinafter, the method of the present invention will be described in detail. The method for determining the presence or absence of amosite in a calcium silicate heat insulating material of the present invention is a method for quickly and easily determining the presence or absence of amosite in a calcium silicate heat insulating material, which has been one of the main uses of asbestos. This is an application of the analysis method. That is, by limiting the object of determination to the calcium silicate heat insulating material, all complicated pretreatments and the like can be omitted.
【００１１】本発明方法は、アモサイトの有無を判別す
る珪酸カルシウム保温材中のアモサイトを特定の酸と反
応・分解させてＦｅ2+を溶出させ、これに２価の鉄イオ
ンと反応する呈色剤の呈色反応を利用してアモサイトの
有無を判別するものである。なお、本発明の第１の発明
による珪酸カルシウム保温材への特定の酸の添加は、例
えば珪酸カルシウム保温材表面に特定の酸を滴下してや
れば良く、珪酸カルシウム保温材を粉砕して特定の酸と
混合する等の煩雑な操作は一切必要ないので、既設の珪
酸カルシウム保温材に対しても判別試験用として保温材
の一部を取り外したりせずに、既設状態のままでアモサ
イトの有無の判別を行うことができる。According to the method of the present invention, the amosite in the calcium silicate insulating material for determining the presence or absence of amosite is reacted and decomposed with a specific acid to elute Fe 2+ , which is reacted with a divalent iron ion. The presence or absence of amosite is determined using the color reaction of the agent. The specific acid may be added to the calcium silicate heat insulating material according to the first invention of the present invention, for example, by dropping the specific acid on the surface of the calcium silicate heat insulating material. Since no complicated operation such as mixing with water is required, it is possible to determine whether amosite is present in the existing condition without removing a part of the heat insulating material for the existing calcium silicate heat insulating material without removing a part of the heat insulating material. It can be performed.
【００１２】また、本発明の第２の発明によれば、珪酸
カルシウム保温材の供試体は粉粒状のものであってもよ
く、この粉粒状供試体に特定の酸及び呈色剤を滴下して
やれば、珪酸カルシウム保温材中のアモサイトの有無の
判別を行うことができる。Further, according to the second aspect of the present invention, the specimen of the calcium silicate heat insulating material may be in the form of a powder, and a specific acid and a coloring agent may be dropped on the powder and the specimen. For example, the presence or absence of amosite in the calcium silicate heat insulating material can be determined.
【００１３】特定の酸としては、濃度１％以上のフッ化
水素酸が望ましく、更に望ましくは濃度５％以上のフッ
化水素酸である。The specific acid is preferably hydrofluoric acid having a concentration of 1% or more, more preferably hydrofluoric acid having a concentration of 5% or more.
【００１４】次に、呈色剤としては、通常のＦｅ2+呈色
反応に使用できるものであればよく、例えばｏ−フェナ
ントロリンを挙げることができる。Next, the coloring agent may be any one which can be used in a usual Fe 2+ coloring reaction, and examples thereof include o-phenanthroline.
【００１５】本発明方法を実施するに際し、特定の酸並
びに呈色剤の滴下順序は特に問われないが、特定の酸を
滴下し、次いで直ちに呈色剤を滴下する方法が最も判別
し易い。In carrying out the method of the present invention, the order of dropping the specific acid and the coloring agent is not particularly limited, but the method of dropping the specific acid and then immediately dropping the coloring agent is most easily discriminated.
【００１６】なお、珪酸カルシウム保温材を構成する原
料中には、アモサイトの他にも不純物として若干の鉄分
が含まれている場合もあるが、原料としてアモサイトを
含んでいる場合と、単に不純物として鉄分を含んでいる
場合とでは、呈色反応に差がある。しかし、このような
理由から、本発明方法は珪酸カルシウム保温材中のアモ
サイト量が１重量％以上の場合に特に有効である。Incidentally, the raw material constituting the calcium silicate heat insulating material may contain a small amount of iron as an impurity in addition to amosite in some cases. There is a difference in the color reaction between the case where iron is contained. However, for these reasons, the method of the present invention is particularly effective when the amount of amosite in the calcium silicate heat insulating material is 1% by weight or more.
【００１７】[0017]
実施例１ 既設珪酸カルシウム保温材(施工年不明)上に、濃度１０
％のフッ化水素酸を滴下し、しかる後、ｏ−フェナント
ロリンを滴下したところ、赤色の呈色した。なお、この
珪酸カルシウム保温材をＸ線回折法にて定量分析したと
ころ、アモサイトの含有量は４重量％であった。Example 1 A concentration of 10 on an existing calcium silicate heat insulating material (construction year unknown).
% Hydrofluoric acid was added dropwise, and then o-phenanthroline was added dropwise. In addition, when this calcium silicate heat insulating material was quantitatively analyzed by the X-ray diffraction method, the content of amosite was 4% by weight.
【００１８】次に、Ｘ線回折法にて、アモサイトの含有
を確認できなかった珪酸カルシウム保温材に対して上記
と同一の処理を行ったところ、薄いダイダイ色を呈し、
呈色反応は極わずかなものであり、アモサイト含有保温
材の呈色反応とは顕著に異なるものであった。Next, when the same treatment as described above was performed on the calcium silicate heat insulating material for which the content of amosite could not be confirmed by X-ray diffraction, a pale die-dyed color was obtained.
The color reaction was extremely slight, and was significantly different from the color reaction of the amosite-containing heat insulating material.
【００１９】実施例２ 既設珪酸カルシウム保温材(施工年不明)から採取した粉
粒状の供試体を容器に取り、その中に濃度１０％のフッ
化水素酸を滴下し、しかる後、ｏ−フェナントロリンを
滴下したところ、赤色の呈色した。なお、この珪酸カル
シウム保温材をＸ線回折法にて定量分析したところ、ア
モサイトの含有量は４重量％であった。Example 2 A powdery and granular specimen collected from an existing calcium silicate heat insulating material (construction year unknown) was placed in a container, and 10% hydrofluoric acid was dropped thereinto, and then o-phenanthroline Was dropped to give a red color. In addition, when this calcium silicate heat insulating material was quantitatively analyzed by the X-ray diffraction method, the content of amosite was 4% by weight.
【００２０】次に、Ｘ線回折法にて、アモサイトの含有
を確認できなかった珪酸カルシウム保温材の粉砕物に対
して上記と同一の処理を行ったところ、薄いダイダイ色
を呈し、呈色反応は極わずかなものであり、アモサイト
含有保温材の呈色反応とは顕著に異なるものであった。Next, when the same treatment as above was performed on the ground calcium silicate heat insulating material for which the content of amosite could not be confirmed by X-ray diffraction, a pale die-dye color was exhibited, and the color reaction was observed. Was very slight and was significantly different from the color reaction of the amosite-containing heat insulating material.
【００２１】[0021]
【発明の効果】本発明の第１の発明に係る珪酸カルシウ
ム保温材中のアモサイトの有無を判別する方法は、装置
や煩雑な操作なしに簡便に行うことができ、また、既設
の珪酸カルシウム保温材を既設状態のまま判別すること
ができる。なお、本発明の第２の発明によれば、珪酸カ
ルシウム保温材の粉粒状供試体を使用しても簡便に該保
温材中のアモサイトの有無を判定することができる。The method for determining the presence or absence of amosite in a calcium silicate heat insulating material according to the first invention of the present invention can be easily carried out without any equipment or complicated operations, and the existing calcium silicate heat insulating material can be used. The material can be determined in the existing state. In addition, according to the second aspect of the present invention, the presence / absence of amosite in the heat insulating material can be easily determined even when a powdery and granular specimen of the calcium silicate heat insulating material is used.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) G01N 33/38 G01N 21/77 G01N 31/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) G01N 33/38 G01N 21/77 G01N 31/00
Claims (3)
とから成形された珪酸カルシウム保温材中に補強繊維と
して使用されているアモサイトの有無を判別するための
方法において、判別を行う珪酸カルシウム保温材に特定
の酸並びに呈色剤を滴下し、アモサイト中の鉄分の呈色
反応によりアモサイトの有無を判別する方法。1. A method for determining the presence or absence of amosite used as a reinforcing fiber in a calcium silicate heat insulating material formed from a calcareous raw material, a siliceous raw material, and a reinforcing fiber. A method in which a specific acid and a coloring agent are dropped on a heat insulating material, and the presence or absence of amosite is determined by a color reaction of iron in amosite.
とから成形された珪酸カルシウム保温材中に補強繊維と
して使用されているアモサイトの有無を判別するための
方法において、判別を行う珪酸カルシウム保温材の粉粒
状供試体に特定の酸並びに呈色剤を滴下し、アモサイト
中の鉄分の呈色反応によりアモサイトの有無を判別する
方法。2. A method for determining the presence or absence of amosite used as a reinforcing fiber in a calcium silicate heat insulating material formed from a calcareous raw material, a siliceous raw material, and a reinforcing fiber. A method in which a specific acid and a coloring agent are dropped on a powdery granular material of a heat insulating material, and the presence or absence of amosite is determined by a color reaction of iron in the amosite.
または２記載の方法。3. The method according to claim 1, wherein the specific acid is hydrofluoric acid.
Or the method of 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03323292A JP3182443B2 (en) | 1991-12-11 | 1992-02-20 | Amosite discrimination method in calcium silicate insulation |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3-327573 | 1991-12-11 | ||
| JP32757391 | 1991-12-11 | ||
| JP03323292A JP3182443B2 (en) | 1991-12-11 | 1992-02-20 | Amosite discrimination method in calcium silicate insulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05215748A JPH05215748A (en) | 1993-08-24 |
| JP3182443B2 true JP3182443B2 (en) | 2001-07-03 |
Family
ID=26371905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03323292A Expired - Lifetime JP3182443B2 (en) | 1991-12-11 | 1992-02-20 | Amosite discrimination method in calcium silicate insulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3182443B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4696035B2 (en) * | 2006-07-25 | 2011-06-08 | 中部電力株式会社 | Asbestos judgment method |
| JP2008209392A (en) * | 2007-02-01 | 2008-09-11 | Tohoku Univ | Asbestos coloring discrimination method and asbestos content measurement method |
-
1992
- 1992-02-20 JP JP03323292A patent/JP3182443B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05215748A (en) | 1993-08-24 |
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