JPH088447Y2 - Sample pretreatment device - Google Patents
Sample pretreatment deviceInfo
- Publication number
- JPH088447Y2 JPH088447Y2 JP11666189U JP11666189U JPH088447Y2 JP H088447 Y2 JPH088447 Y2 JP H088447Y2 JP 11666189 U JP11666189 U JP 11666189U JP 11666189 U JP11666189 U JP 11666189U JP H088447 Y2 JPH088447 Y2 JP H088447Y2
- Authority
- JP
- Japan
- Prior art keywords
- inner cylinder
- test liquid
- cylinder
- conductivity
- water
- 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
- 239000007788 liquid Substances 0.000 claims description 44
- 238000012360 testing method Methods 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 description 26
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 22
- 229910052801 chlorine Inorganic materials 0.000 description 22
- 235000002639 sodium chloride Nutrition 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 150000003839 salts Chemical class 0.000 description 12
- 239000012085 test solution Substances 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000011780 sodium chloride Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、無試薬式残留塩素計で測定を行なう場合等
に被検液の導電率を高めるために用いられる試料前処理
装置に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sample pretreatment device used for increasing the conductivity of a test liquid when performing measurement with a reagentless residual chlorine meter.
従来、被検液中の残留塩素濃度を測定するための計器
として、振動式残留塩素計等の無試薬式残留塩素計が知
られている。この無試薬式残留塩素計は、特別の試薬を
必要としないなどの種々の利点を有するため、上水道末
端の残留塩素モニターとして広く実用化されており、ま
た最近では浄水場内部の管理計器、純水製造装置の塩素
滅菌後のモニター等としてもその利用が期待されている
が、このタイプの残留塩素計は無試薬式ということで被
検液の導電率及びpHの変化による測定誤差がかなり大き
く、利用範囲に制約を受けており、このためやむなく高
価な試薬を添加する有試薬式残留塩素計を用いるケース
も多いのが実情である。Conventionally, a reagentless residual chlorine meter such as a vibration residual chlorine meter is known as an instrument for measuring the residual chlorine concentration in a test liquid. This non-reagent type residual chlorine meter has various advantages such as no need for special reagents, so it has been widely put into practical use as a residual chlorine monitor at the end of water supply. It is expected to be used as a monitor after chlorine sterilization of water production equipment, but since this type of residual chlorine meter is a reagentless type, the measurement error due to changes in conductivity and pH of the test liquid is considerably large. However, there are many cases in which a reagent-based residual chlorine meter, which is unavoidably added with an expensive reagent, is used because the usage range is restricted.
この場合、無試薬式残留塩素計の利用範囲の制約はpH
よりむしろ導電率の変化或いは不足によることが多い。
特に、被検液がある程度の導電率を有するものであるこ
とが必要であり、被検液の導電率が低いと正確な測定を
行なうことができない。このため導電率が低い被検液、
例えば半導体製造用の純水や浄水場における導電率が30
〜50μS/cm程度の良質な水等を無試薬式残留塩素計で測
定する場合、従来被検液に対する前処理として、通常流
量200〜300ml/分の被検液に濃度２〜３％程度の食塩水
を定量ポンプで少量連続的に添加し、これにより被検液
の導電率を高めることが行なわれている。In this case, the restriction on the range of use of the reagentless residual chlorine meter is pH.
Rather, it is often due to a change or lack of conductivity.
In particular, it is necessary that the test liquid has a certain degree of conductivity, and accurate measurement cannot be performed if the test liquid has a low conductivity. Therefore, the test liquid with low conductivity,
For example, the conductivity in pure water for semiconductor manufacturing or water purification plants is 30
When measuring high quality water such as ~ 50μS / cm with a reagentless residual chlorine meter, as a pretreatment for the conventional test solution, a normal flow rate of 200 ~ 300ml / min. A small amount of saline is continuously added by a metering pump to increase the conductivity of the test liquid.
しかし、上述したように被検液に食塩水を添加する前
処理手段を採用した場合、食塩水の添加量が100〜200l/
月と膨大な量になり、このため有試薬式の残留塩素計と
同程度の計器設置スペースと保守工数が必要となる上、
無試薬式といいながらも多量の食塩水を使用することに
なり、従って無試薬式残留塩素計のメリットの１つであ
る簡便さを十分生かすことができない。However, when the pretreatment means for adding saline to the test liquid is adopted as described above, the amount of saline added is 100 to 200 l /
It will be a huge amount per month, and as a result, it will require a meter installation space and maintenance manpower equivalent to that of a reagent-based residual chlorine meter, and
Although it is called a reagentless type, a large amount of saline is used, and therefore, the convenience, which is one of the merits of the reagentless residual chlorine meter, cannot be fully utilized.
本考案は上記事情に鑑みなされたもので、無試薬式残
留塩素計で導電率の低い被検液の測定を行なう場合等の
前処理用に使用され、被検液の導電率を簡便に所望の値
に上昇させることができる前処理装置を提供することを
目的とする。The present invention has been made in view of the above circumstances, and is used for pretreatment such as when measuring a test liquid having a low conductivity with a reagentless residual chlorine meter, and it is possible to easily obtain the conductivity of the test liquid. It is an object of the present invention to provide a pretreatment device capable of increasing the value of.
本考案は上記目的を達成するため、非通水性材料から
なる外筒とこの外筒内に配設された通水性材料からなる
内筒と上記外筒と内筒の下端部間を閉塞する非通水性材
料からなるリング体とを備えたケースの上記内筒と外筒
との間の空間部に電解質を充填すると共に、上記内筒の
上端開口部から内筒内に上下方向に摺動可能な非通水性
材料からなるパイプを所定深さ挿入してなり、上記内筒
内にその下端開口部から被検液を流入させ、この被検液
を内筒の周壁部に接触させてから上記パイプの中空部を
通してその上端開口部より流出させるようにしたことを
特徴とする試料前処理装置を提供する。In order to achieve the above-mentioned object, the present invention provides an outer cylinder made of a non-water-permeable material, an inner cylinder made of a water-permeable material disposed in the outer cylinder, and a non-blocking member between the outer cylinder and the lower end of the inner cylinder. A space provided between the inner cylinder and the outer cylinder of a case having a ring body made of a water-permeable material is filled with an electrolyte, and can be slid vertically in the inner cylinder from the upper end opening of the inner cylinder. A pipe made of a non-water-permeable material is inserted to a predetermined depth, and the test liquid is allowed to flow into the inner cylinder through the lower end opening thereof, and the test liquid is brought into contact with the peripheral wall of the inner cylinder, There is provided a sample pretreatment device characterized in that the pipe is made to flow through a hollow portion and flow out from an upper end opening portion thereof.
本考案装置においては、内筒内にその下端開口部から
被検液を流入させることにより、被検液が内筒の通水性
を有する周壁部を通って内筒と外筒との間の空間部に流
入し、この被検液に上記空間部に充填された電解質が徐
々に溶解すると共に、この電解質を溶解した被検液が内
筒の周壁部を通って内筒内を通過する被検液に拡散，混
合され、これにより被検液の導電率が上昇する。この場
合、上記内筒に挿入したパイプを適宜進退させて内筒内
周面の露呈面積を調節し、上記空間部から内筒周壁部を
通って内筒内を通過する被検液に混合される電解質を溶
解した被検液の量を調整することにより、被検液を所望
の導電率に上昇させることができる。即ち、本考案にお
いては、電解質は内筒周壁部を介して空間部から拡散に
よって内筒内の被検液に供給され、電解質の溶媒は逆に
内筒内の被検液から内筒周壁部を介して空間部に供給さ
れるもので、このとき内筒周壁部の内筒中空部への露呈
面積をパイプによって調節することにより、電解質の被
検液への拡散量を調節できるものである。In the device of the present invention, by allowing the test liquid to flow into the inner cylinder from the lower end opening thereof, the test liquid passes through the peripheral wall portion having water permeability of the inner cylinder and the space between the inner cylinder and the outer cylinder. The electrolyte filled in the space gradually dissolves in the test liquid and the test liquid in which the electrolyte is dissolved passes through the inner wall of the inner cylinder and passes through the inner cylinder. The liquid is diffused and mixed with the liquid, which increases the conductivity of the test liquid. In this case, the pipe inserted into the inner cylinder is appropriately advanced and retracted to adjust the exposed area of the inner peripheral surface of the inner cylinder, and is mixed with the test liquid passing through the inner cylinder from the space portion through the inner cylinder peripheral wall portion. The conductivity of the test liquid can be increased to a desired value by adjusting the amount of the test liquid in which the electrolyte is dissolved. That is, in the present invention, the electrolyte is supplied to the test liquid in the inner cylinder by diffusion from the space through the inner wall of the inner cylinder, and the solvent of the electrolyte is reversed from the test liquid in the inner cylinder to the inner wall of the inner cylinder. Is supplied to the space portion via the pipe, and at this time, by adjusting the exposed area of the inner cylindrical peripheral wall portion to the inner cylindrical hollow portion with a pipe, the diffusion amount of the electrolyte into the test liquid can be adjusted. .
次に実施例を示し、本考案を具体的に説明するが、本
考案は下記実施例に限定されるものではない。Next, the present invention will be described in detail with reference to examples, but the present invention is not limited to the following examples.
第１図は本考案の一実施例を示す。本前処理装置１に
おいて２はプラスチックケースで、このケース２は透明
プラスチックからなる円筒形の非通水性外筒３の中央部
に多数の通水孔４を有するポリエチレン製多孔性フィル
ター材からなる円筒形の内筒５を配置し、かつ上記外筒
３及び内筒５の下端部間に形成される開口部をプラスチ
ックからなる非通水性リング体６によって閉塞すると共
に、外筒３及び内筒５の上端部間に形成される開口部を
プラスチック製蓋体７によって閉塞したものである。ま
た、上記外筒３と内筒５との間の空間部８には多数の食
塩錠剤（電解質）９が充填されていると共に、内筒５内
にはその上端開口部からプラスチック製の非通水性円筒
状パイプ10が上下方向に摺動自在に所定深さまで挿入さ
れ、これにより内筒５の周壁部が内筒５の中空部に所定
長さａ分だけ露呈されている。FIG. 1 shows an embodiment of the present invention. In this pretreatment apparatus 1, 2 is a plastic case, and this case 2 is a cylinder made of polyethylene porous filter material having a large number of water passage holes 4 in the center of a cylindrical non-water-permeable outer cylinder 3 made of transparent plastic. A cylindrical inner cylinder 5 is arranged, and the openings formed between the lower ends of the outer cylinder 3 and the inner cylinder 5 are closed by a water impermeable ring body 6 made of plastic, and the outer cylinder 3 and the inner cylinder 5 are The opening formed between the upper ends of the above is closed by the plastic lid 7. A large number of salt tablets (electrolytes) 9 are filled in the space 8 between the outer cylinder 3 and the inner cylinder 5, and the inner cylinder 5 is made of a plastic non-permeable material through its upper end opening. The aqueous cylindrical pipe 10 is vertically slidably inserted to a predetermined depth, whereby the peripheral wall portion of the inner cylinder 5 is exposed to the hollow portion of the inner cylinder 5 by a predetermined length a.
本実施例の前処理装置１は、第２図に示すように、無
試薬式残留塩素計11に導入される被検液の流路12に介装
して使用するもので、被検液を内筒５の下端開口部から
内筒５内に流入させ、この被検液をパイプ10の上端開口
部から流出させるものである。この場合、被検液が内筒
５内に流入すると被検液が通水孔４を通って上記空間部
８内に高さａまで入り、この被検液に食塩錠剤９が溶解
すると共に、この食塩を溶解した被検液が通水孔４を通
って内筒５内を流れる被検液に拡散し、これにより流路
12を流れる被検液の導電率が上昇する。As shown in FIG. 2, the pretreatment apparatus 1 of the present embodiment is used by interposing it in a flow path 12 of a test solution introduced into a reagentless residual chlorine meter 11, and The test liquid is caused to flow into the inner cylinder 5 through the lower end opening of the inner cylinder 5, and the test liquid is caused to flow out through the upper end opening of the pipe 10. In this case, when the test liquid flows into the inner cylinder 5, the test liquid passes through the water passage holes 4 and enters the space portion 8 to the height a, and the salt tablets 9 are dissolved in the test liquid. The test solution in which this salt is dissolved diffuses through the water passage hole 4 into the test solution flowing in the inner cylinder 5, whereby the flow path is formed.
The conductivity of the test liquid flowing through 12 increases.
ここで、被検液の導電率の上昇量は、パイプ10を上下
にスライドさせて高さａを調節し、食塩を溶解した被検
液の空間部８から内筒５内部への拡散量を調整すること
によって最適の値にすることができる。例えば、無試薬
式残留塩素計の導電率特性を第３図に示すが、塩素滅菌
に必要なCl2濃度は0.5〜1.5mg/lであるから、無試薬式
残留塩素計を塩素滅菌後の純水のモニターとして使用す
る場合、被検液の導電率を80〜100μS/cm以上とすれば
よい。この場合、導電率を必要以上に上昇させることは
食塩錠剤の消費量が増大するため好ましくない。なお、
食塩錠剤のケース２への充填量は被検液流量100ml/分当
たり１ヵ月で200〜300g程度でよい。Here, the amount of increase in the conductivity of the test liquid is determined by adjusting the height a by sliding the pipe 10 up and down to determine the diffusion amount of the test liquid in which salt is dissolved from the space 8 into the inner cylinder 5. It can be adjusted to the optimum value. For example, the conductivity characteristics of a reagentless residual chlorine meter is shown in Fig. 3. The Cl 2 concentration required for chlorine sterilization is 0.5 to 1.5 mg / l. When used as a monitor of pure water, the conductivity of the test liquid may be 80 to 100 μS / cm or more. In this case, it is not preferable to raise the conductivity more than necessary because the consumption amount of the salt tablets increases. In addition,
The filling amount of the salt tablets into the case 2 may be about 200 to 300 g per month for 100 ml / min of the test liquid flow rate.
本実施例の装置によれば、被検液の導電率を簡便にか
つ何らの保守も要さずに長期間にわたって安定に上昇さ
せることができる。例えば、第２図に示したシステムに
おいて導電率が10〜20μS/cmの被検液を流路12に約50ml
/分の流量で流し、装置１で被検液の導電率を80〜100μ
S/cmに上昇させる場合、150gの食塩錠剤９を空間部８に
充填しておくことにより１ヵ月以上の連続測定が可能で
あり、食塩水を被検液に添加するのに比べてはるかに簡
単な設備、保守によって被検液の導電率を所望の値に上
昇させることができる。また、本装置においては空間部
８の高さａより上方には被検液が入らず、従って空間部
８の上部に食塩錠剤９がストックされた状態となるた
め、食塩錠剤９の補充を長期間行なわなくてよい。更
に、本装置は外筒３を透明にしたことにより、空間部８
内を外部から観察することができ、従って錠剤９の減り
具合を容易に確認できると共に、空間部８内の被検液中
のCl2が光によって分解され、内筒５内を流れる被検液
のCl2濃度に変化を与えないといった利点も有する。According to the apparatus of the present embodiment, the conductivity of the test liquid can be easily and stably increased for a long period of time without any maintenance. For example, in the system shown in FIG. 2, about 50 ml of the test liquid having a conductivity of 10 to 20 μS / cm is supplied to the flow path 12.
Flow at a flow rate of / min, and set the conductivity of the test liquid in the device 1 to 80-100μ
When increasing to S / cm, it is possible to continuously measure for one month or more by filling 150 g of salt tablets 9 into the space 8, which is far more than adding saline to the test solution. The electrical conductivity of the test liquid can be increased to a desired value with simple equipment and maintenance. Further, in this device, the test liquid does not enter above the height a of the space portion 8, and therefore the salt tablets 9 are stocked in the upper portion of the space portion 8, so that the salt tablet 9 can be replenished for a long time. You don't have to do it for a period. Further, in this device, since the outer cylinder 3 is made transparent, the space 8
It is possible to observe the inside from the outside, and thus it is possible to easily confirm the degree of decrease of the tablets 9, and Cl 2 in the test solution in the space 8 is decomposed by light, and the test solution flowing in the inner cylinder 5 is detected. It also has the advantage that it does not change the Cl 2 concentration.
なお、上記実施例では内筒５をポリエチレンからなる
多孔性フィルタ材によって形成したが、内筒５の構造は
これに限られず、例えば樹脂パイプに縦スリットを適宜
本数設けることなどによっても形成することができる。
また、電解質として食塩錠剤を使用したが、粉粒状や塊
状の食塩、苛性ソーダや塩化カリウムの錠剤、粉粒物等
を用いてもよく、その他の構成についても本考案の要旨
を逸脱しない範囲で種々変更して差支えない。In addition, although the inner cylinder 5 is formed of the porous filter material made of polyethylene in the above-mentioned embodiment, the structure of the inner cylinder 5 is not limited to this, and may be formed, for example, by providing an appropriate number of vertical slits in the resin pipe. You can
Although salt tablets were used as the electrolyte, powdered or lumpy salt, caustic soda or potassium chloride tablets, powdered substances, etc. may be used, and other configurations may be changed within the range not departing from the gist of the present invention. You can change it.
以上説明したように、本考案の試料前処理装置は、被
検液の導電率を簡単な設備によって面倒な保守を要する
ことなく長期間にわたって安定に所望の値に上昇させる
ことができる。従って、本考案装置を無試薬式残留塩素
計の試料前処理用に使用した場合、従来簡便に測定する
ことが困難であった半導体製造用の純水等の導電率の低
い被検液の測定を容易に行なうことができるなど、無試
薬式残留塩素計の利用範囲を大きく広げることができる
と共に、測定の簡便さという無試薬式残留塩素計の有す
るメリットを十分に発揮させることができるものであ
る。As described above, the sample pretreatment device of the present invention can stably increase the conductivity of the test liquid to a desired value for a long period of time without requiring troublesome maintenance with simple equipment. Therefore, when the device of the present invention is used for sample pretreatment of a reagentless residual chlorine meter, it is difficult to easily measure the conventional method for measuring a test liquid with low conductivity such as pure water for semiconductor manufacturing. It is possible to greatly expand the range of use of the reagentless residual chlorine meter, such as that it can be easily performed, and to fully demonstrate the merit of the reagentless residual chlorine meter, which is the ease of measurement. is there.
第１図は本考案の一実施例を示す断面図、第２図は同装
置の使用状態を示す概略図、第３図は無試薬式残留塩素
計の導電率特性を示すグラフである。 １…試料前処理装置、２…ケース、３…外筒、４…通水
孔、５…内筒、６…リング体、８…空間部、９…食塩錠
剤、10…パイプ、11…無試薬式残留塩素計。FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a schematic view showing a usage state of the apparatus, and FIG. 3 is a graph showing a conductivity characteristic of a reagentless residual chlorine meter. DESCRIPTION OF SYMBOLS 1 ... Sample pretreatment apparatus, 2 ... Case, 3 ... Outer cylinder, 4 ... Water passage hole, 5 ... Inner cylinder, 6 ... Ring body, 8 ... Space part, 9 ... Salt tablet, 10 ... Pipe, 11 ... No reagent Type residual chlorine meter.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｇ０１Ｎ 1/36 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // G01N 1/36
Claims (1)
に配設された通水性材料からなる内筒と、上記外筒と内
筒の下端部間を閉塞する非通水性材料からなるリング体
とを備えたケースの上記内筒と外筒との間の空間部に電
解質を充填すると共に、上記内筒の上端開口部から内筒
内に上下方向に摺動可能な非通水性材料からなるパイプ
を所定深さ挿入してなり、上記内筒内にその下端開口部
から被検液を流入させ、この被検液を内筒の周壁部に接
触させてから上記パイプの中空部を通してその上端開口
部より流出させるようにしたことを特徴とする試料前処
理装置。1. An outer cylinder made of a non-water-permeable material, an inner cylinder made of a water-permeable material arranged in the outer cylinder, and a non-water-permeable material for closing a gap between the outer cylinder and the lower end portion of the inner cylinder. A space between the inner cylinder and the outer cylinder of the case including a ring body made of is filled with electrolyte, and the upper cylinder is vertically slidable into the inner cylinder from the upper end opening of the inner cylinder. A pipe made of an aqueous material is inserted to a predetermined depth, and a test liquid is caused to flow into the inner cylinder through a lower end opening thereof, and the test liquid is brought into contact with a peripheral wall portion of the inner cylinder before the hollow of the pipe. A sample pretreatment device, characterized in that it is made to flow out from the upper end opening through the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11666189U JPH088447Y2 (en) | 1989-10-05 | 1989-10-05 | Sample pretreatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11666189U JPH088447Y2 (en) | 1989-10-05 | 1989-10-05 | Sample pretreatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0357658U JPH0357658U (en) | 1991-06-04 |
| JPH088447Y2 true JPH088447Y2 (en) | 1996-03-06 |
Family
ID=31664928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11666189U Expired - Lifetime JPH088447Y2 (en) | 1989-10-05 | 1989-10-05 | Sample pretreatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH088447Y2 (en) |
-
1989
- 1989-10-05 JP JP11666189U patent/JPH088447Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0357658U (en) | 1991-06-04 |
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