JPS622256B2 - - Google Patents
Info
- Publication number
- JPS622256B2 JPS622256B2 JP11407082A JP11407082A JPS622256B2 JP S622256 B2 JPS622256 B2 JP S622256B2 JP 11407082 A JP11407082 A JP 11407082A JP 11407082 A JP11407082 A JP 11407082A JP S622256 B2 JPS622256 B2 JP S622256B2
- Authority
- JP
- Japan
- Prior art keywords
- oil mist
- hexane
- oil
- filter
- concentration
- 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
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 30
- 239000003595 mist Substances 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 8
- -1 Next Chemical compound 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 6
- 239000012080 ambient air Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003570 air Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/02—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by absorbing or adsorbing components of a material and determining change of weight of the adsorbent, e.g. determining moisture content
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (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)
- Sampling And Sample Adjustment (AREA)
Description
本発明は、切削加工時等に生ずるオイルミスト
の濃度測定方法に関するものである。
機械加工職場においては、切削加工時にオイル
ミストが発生するが、その濃度が大きくなること
は作業環境上問題がある。現在、作業環境上許容
されるオイルミストの濃度は３mg／m3であるが、
作業環境測定ガイドブツク（労働安全衛生部労働
衛生課編）には、具体的にこのオイルミストの定
量分析法について記載されていない。
ここにおいて、本発明は、簡単な手法によつ
て、環気中のオイルミストの濃度を測定できる方
法を提供しようとするものである。
本発明に係るオイルミストの濃度測定方法は、
環気中のオイルミストをハイボリユームサンプラ
でフイルターに捕集し、このフイルターに捕集さ
れたオイルミストをｎ―ヘキサンで抽出し、ｎ―
ヘキサンを恒温槽で飛ばして油の重量を求める点
に特徴がある。
第１図は、本発明に係る測定方法を説明するた
めのフローシートである。本発明においては、環
気中のオイルミストをハイボリユームサンプラ―
（流量100〜500e／min）でフイルターに捕集す
る。次にフイルターを細くちぎつて共栓付試験管
に入れ、これにｎ―ヘキサン15c.c.を加え、激しく
振りまぜることによつてフイルターに捕集された
オイルミストを抽出する。続いて、これを濾過
し、ｎ―ヘキサン５c.c.で洗浄（濾紙をよくしぼ
る）し、アルミカツプに入れ、80℃に設定された
ホツトプレートで、ｎ―ヘキサンを飛ばし、恒量
して捕集前のフイルターの重量との差から油の重
量Ｙ（mg）を求める。また、環気中のオイルミス
ト測定の基礎実験として、フイルターに既知量
（Ｘmg）の油を浸み込ませ、同様の手法によりｎ
―ヘキサン抽出率（Ｙ／Ｘ）を決定する。環気中
のオイルミスト濃度Ｄ（mg／m3）は次式で求めら
れる。
Ｄ＝捕集前後のフイルター重量差（mg）／抽出率（％
）×吸引量（m3）
次に本発明の測定方法による一実施例について
示す。第１表は、ｎ―ヘキサン抽出率決定のため
の基礎実験結果であり、また、第２図は、この実
験におけるサンプル量とｎ―ヘキサン抽出量との
関係を示す線図である。
The present invention relates to a method for measuring the concentration of oil mist generated during cutting. In machining workplaces, oil mist is generated during cutting, but increasing its concentration poses problems in terms of the working environment. Currently, the concentration of oil mist that is permissible in the working environment is 3mg/ m3 ,
The Working Environment Measurement Guidebook (edited by the Occupational Health Division, Department of Occupational Safety and Health) does not specifically describe this quantitative analysis method for oil mist. Here, the present invention aims to provide a method that can measure the concentration of oil mist in ambient air using a simple method. The method for measuring the concentration of oil mist according to the present invention includes:
The oil mist in the ambient air is collected on a filter using a high volume sampler, and the oil mist collected on the filter is extracted with n-hexane.
The unique feature is that hexane is evaporated in a constant temperature bath to determine the weight of the oil. FIG. 1 is a flow sheet for explaining the measurement method according to the present invention. In the present invention, oil mist in the surrounding air is collected using a high-volume sampler.
(flow rate 100-500e/min) and collect it on a filter. Next, tear the filter into pieces and place them in a stoppered test tube, add 15 c.c. of n-hexane, and shake vigorously to extract the oil mist collected by the filter. Next, this was filtered, washed with 5 c.c. of n-hexane (wringing out the filter paper well), placed in an aluminum cup, and placed on a hot plate set at 80°C to remove n-hexane and collect at a constant weight. Obtain the weight Y (mg) of the oil from the difference with the weight of the previous filter. In addition, as a basic experiment for measuring oil mist in ambient air, we impregnated a filter with a known amount (Xmg) of oil and conducted a
-Determine the hexane extraction rate (Y/X). The oil mist concentration D (mg/m 3 ) in the surrounding air is determined by the following formula. D = Difference in filter weight before and after collection (mg) / Extraction rate (%
) x suction amount (m 3 ) Next, an example using the measuring method of the present invention will be described. Table 1 shows the results of a basic experiment for determining the n-hexane extraction rate, and FIG. 2 is a diagram showing the relationship between the sample amount and the n-hexane extraction amount in this experiment.
【表】
この基礎実験から、抽出率は68.4％と決定され
る。続いて、切削加工中のオイルミストについて
測定し、基礎実験で得られたｎ―ヘキサン抽出率
を適用したところ、第２表に示すような測定結果
が得られた。[Table] From this basic experiment, the extraction rate was determined to be 68.4%. Subsequently, the oil mist during cutting was measured and the n-hexane extraction rate obtained in the basic experiment was applied, and the measurement results shown in Table 2 were obtained.
【表】
以上説明したように、本発明の測定方法によれ
ば、簡単な手法によつて環気中のオイルミストの
濃度を測定することができるので、機械加工職場
等における作業環境の向上に寄与できる。[Table] As explained above, according to the measuring method of the present invention, it is possible to measure the concentration of oil mist in the ambient air using a simple method, which is useful for improving the working environment in machining workplaces, etc. I can contribute.
第１図は本発明に係る測定方法を説明するため
のフローシート図、第２図は本発明の測定方法に
おいて基礎実験におけるサンプル量とｎ―ヘキサ
ン抽出量の関係を示す線図である。
FIG. 1 is a flow sheet diagram for explaining the measuring method according to the present invention, and FIG. 2 is a diagram showing the relationship between the sample amount and the amount of n-hexane extracted in a basic experiment in the measuring method of the present invention.
Claims (1)
プラでフイルターに捕集し、このフイルターに捕
集されたオイルミストをｎ―ヘキサンで抽出し、
次にｎ―ヘキサンを恒温槽で飛ばし、油の重量を
求めるとともにフイルターに既知量のオイルをし
みこませ前記と同様の手法を経てｎ―ヘキサン抽
出率を求め、前記油の重量とｎ―ヘキサン抽出率
とから前記オイルミストの濃度を知るようにした
オイルミストの濃度測定方法。1. Collect the oil mist in the ring air on a filter using a high volume sampler, extract the oil mist collected on the filter with n-hexane,
Next, n-hexane is removed in a constant temperature bath, the weight of the oil is determined, a known amount of oil is soaked into the filter, the n-hexane extraction rate is determined using the same method as above, and the weight of the oil and n-hexane extraction are determined. A method for measuring the concentration of oil mist in which the concentration of the oil mist is determined from the ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11407082A JPS595937A (en) | 1982-07-02 | 1982-07-02 | Measurement of oil mist density |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11407082A JPS595937A (en) | 1982-07-02 | 1982-07-02 | Measurement of oil mist density |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS595937A JPS595937A (en) | 1984-01-12 |
| JPS622256B2 true JPS622256B2 (en) | 1987-01-19 |
Family
ID=14628282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11407082A Granted JPS595937A (en) | 1982-07-02 | 1982-07-02 | Measurement of oil mist density |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS595937A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020070882A1 (en) * | 2018-10-05 | 2020-04-09 | 日産自動車株式会社 | Hybrid vehicle |
| WO2020070881A1 (en) | 2018-10-05 | 2020-04-09 | 日産自動車株式会社 | Hybrid vehicle |
-
1982
- 1982-07-02 JP JP11407082A patent/JPS595937A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020070882A1 (en) * | 2018-10-05 | 2020-04-09 | 日産自動車株式会社 | Hybrid vehicle |
| WO2020070881A1 (en) | 2018-10-05 | 2020-04-09 | 日産自動車株式会社 | Hybrid vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS595937A (en) | 1984-01-12 |
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