JP4909289B2 - Method for producing composition for artificial seawater - Google Patents
Method for producing composition for artificial seawater Download PDFInfo
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- JP4909289B2 JP4909289B2 JP2008006456A JP2008006456A JP4909289B2 JP 4909289 B2 JP4909289 B2 JP 4909289B2 JP 2008006456 A JP2008006456 A JP 2008006456A JP 2008006456 A JP2008006456 A JP 2008006456A JP 4909289 B2 JP4909289 B2 JP 4909289B2
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
この発明は、例えば海水等に棲息する動植物などを飼育するための人工海水を作製するのに用いられる人工海水用組成物の製造方法に関する。 The present invention relates to a method for producing a composition for artificial seawater used for producing artificial seawater for raising animals and plants that live in seawater, for example.
この種の人工海水としては、塩化ナトリウム、カルシウム塩、炭酸塩などの各種塩類を含有したものが公知である（特許文献１、２参照）。一般には、これら各種塩類が予め所定割合で混合されてなる人工海水用組成物が市販されており、使用者がこの人工海水用組成物を所定量の水に溶解して人工海水を調製して使用に供される。
しかしながら、少なくとも塩化ナトリウム、カルシウム塩、炭酸塩が混合されてなる人工海水用組成物を水に溶解して人工海水を調製した場合、人工海水が少し白く濁ったものになるという問題があった。この人工海水を例えば観賞魚用水槽の水槽水として用いる場合には少し白く濁っていることにより観賞魚が見えづらくなり観賞性が低下するという難点があった。また、濁っているとイオンバランスが不安定であるため、海水生物を飼育できる状態になるまでに時間を要するという問題もあった。 However, when artificial seawater is prepared by dissolving a composition for artificial seawater in which at least sodium chloride, calcium salt, and carbonate are mixed in water, there is a problem that the artificial seawater becomes slightly white and cloudy. For example, when this artificial seawater is used as aquarium water for an aquarium for aquarium fish, it is difficult to see the aquarium fish because it is a little white and cloudy. In addition, since the ion balance is unstable when it is cloudy, there is also a problem that it takes time to be able to breed seawater organisms.
この発明は、かかる技術的背景に鑑みてなされたものであって、人工海水を調製したときに該人工海水に白い濁りが生じることのない人工海水用組成物の製造方法を提供することを目的とする。 The present invention has been made in view of such a technical background, and an object of the present invention is to provide a method for producing a composition for artificial seawater that does not cause white turbidity in the artificial seawater when the artificial seawater is prepared. And
本発明者は、上記人工海水が少し白く濁っている原因を鋭意究明した結果、この白濁の原因は、前記各種塩類を混合して人工海水用組成物を作製した段階において、該組成物中に水に非常に溶解しにくい炭酸カルシウムを生成しているためであることが判った。即ち、人工海水用組成物中に生成された炭酸カルシウムが水に溶解しにくく、これが人工海水の白濁の原因になっていることが判った。 As a result of earnestly investigating the cause of the artificial seawater being slightly white and cloudy, the cause of this white turbidity is found in the composition at the stage of preparing the composition for artificial seawater by mixing the various salts. It was found that this was because calcium carbonate, which was very difficult to dissolve in water, was produced. That is, it was found that the calcium carbonate produced in the composition for artificial seawater is difficult to dissolve in water, which causes white turbidity of the artificial seawater.
本発明者は、このような人工海水の白濁を防止するべく鋭意研究した結果、カルシウム塩のカルシウムに関してキレート剤との間でキレートを形成できるような製造方法を採用すれば、上記人工海水における白濁の問題を解消できることを見出すに至り、本発明を完成したものである。 As a result of earnest research to prevent such cloudiness of artificial seawater, the present inventor, as a result of adopting a production method that can form a chelate with a chelating agent with respect to calcium of the calcium salt, the cloudiness in the artificial seawater. The present invention has been completed by finding out that the above problem can be solved.
前記目的を達成するために、本発明は以下の手段を提供する。 In order to achieve the above object, the present invention provides the following means.
［１］少なくとも塩化ナトリウム、カルシウム塩、炭酸塩及びキレート剤を混合して人工海水用組成物を製造するに際し、
カルシウム塩とキレート剤の混合を行った後に、炭酸塩の添加混合を行うことを特徴とする人工海水用組成物の製造方法。
[1] When producing a composition for artificial seawater by mixing at least sodium chloride, calcium salt, carbonate and chelating agent,
A method for producing an artificial seawater composition, comprising mixing a calcium salt and a chelating agent and then adding and mixing a carbonate.
［２］少なくとも塩化ナトリウム、カルシウム塩、炭酸塩及びキレート剤を混合して人工海水用組成物を製造するに際し、
炭酸塩とキレート剤の混合を行った後に、カルシウム塩の添加混合を行うことを特徴とする人工海水用組成物の製造方法。
[2] In producing an artificial seawater composition by mixing at least sodium chloride, calcium salt, carbonate and chelating agent,
A method for producing a composition for artificial seawater, comprising adding a calcium salt after mixing a carbonate and a chelating agent.
［３］前記キレート剤としてエチレンジアミンテトラ酢酸キレートを用いる前項１または２に記載の人工海水用組成物の製造方法。 [3] The process for producing an artificial seawater composition according to item 1 or 2, wherein ethylenediaminetetraacetic acid chelate is used as the chelating agent.
［４］前記エチレンジアミンテトラ酢酸キレートがエチレンジアミン四酢酸二ナトリウムである前項３に記載の人工海水用組成物の製造方法。 [4] The method for producing an artificial seawater composition according to item 3 above, wherein the ethylenediaminetetraacetic acid chelate is disodium ethylenediaminetetraacetic acid.
［５］前項１〜４のいずれか１項に記載の製造方法により製造された人工海水用組成物。 [5] A composition for artificial seawater produced by the production method according to any one of items 1 to 4.
［１］の発明では、炭酸塩の添加の前に、先にカルシウム塩とキレート剤を混合するので、カルシウム塩のカルシウムがキレート剤との間でキレートを形成するものと考えられ、このカルシウムキレートの形成により、この後に炭酸塩が添加されても炭酸カルシウムの生成が十分に抑制される。即ち、本製造方法により得られた人工海水用組成物は、カルシウム塩と炭酸塩とを含有するにもかかわらず、炭酸カルシウムの生成が十分に抑制されたものとなる。従って、得られた人工海水用組成物を用いて調製された人工海水は、白い濁りが生じることがなく、透明度の高いものとなる。また、水に非常に溶解しにくい炭酸カルシウムの生成が抑制されることで人工海水におけるカルシウムイオンの溶解量が大きく増大するので、十分な緩衝作用が得られ、ｐＨの変動の少ない人工海水が得られる。また、濁りがないことで、イオンバランスが安定であり、人工海水調製後に直ちに海水生物を飼育できる状態になる。なお、この［１］の発明において、塩化ナトリウムの混合順序は特に限定されない。 In the invention of [1], since the calcium salt and the chelating agent are first mixed before adding the carbonate, it is considered that calcium of the calcium salt forms a chelate with the chelating agent. Due to the formation of this, the formation of calcium carbonate is sufficiently suppressed even if a carbonate is added thereafter. That is, the artificial seawater composition obtained by the present production method is one in which the production of calcium carbonate is sufficiently suppressed despite containing the calcium salt and the carbonate. Therefore, the artificial seawater prepared using the obtained composition for artificial seawater does not cause white turbidity and has high transparency. Moreover, since the amount of calcium ions dissolved in artificial seawater is greatly increased by suppressing the formation of calcium carbonate, which is very difficult to dissolve in water, sufficient buffering action is obtained, and artificial seawater with little pH fluctuation is obtained. It is done. Moreover, since there is no turbidity, the ion balance is stable, and it becomes possible to breed seawater organisms immediately after artificial seawater preparation. In the invention of [1], the order of mixing sodium chloride is not particularly limited.
［２］の発明では、炭酸塩とキレート剤とが混合された混合状態のところに、カルシウム塩の添加混合を行うものであるが、この時、カルシウム塩のカルシウムは、炭酸カルシウムを形成するよりも優先的にキレート剤との間でキレートを形成するものと考えられ（即ちカルシウムイオンはキレート剤との間できわめてたやすくキレートを形成する）、このようにカルシウムキレートが優先的に形成されることで、炭酸カルシウムの生成が十分に抑制される。即ち、本製造方法により得られた人工海水用組成物は、カルシウム塩と炭酸塩とを含有するにもかかわらず、炭酸カルシウムの生成が十分に抑制されたものとなる。従って、得られた人工海水用組成物を用いて調製された人工海水は、白い濁りが生じることがなく、透明度の高いものとなる。また、水に非常に溶解しにくい炭酸カルシウムの生成が抑制されることで人工海水におけるカルシウムイオンの溶解量が大きく増大するので、十分な緩衝作用が得られ、ｐＨの変動の少ない人工海水が得られる。また、濁りがないことで、イオンバランスが安定であり、人工海水調製後に直ちに海水生物を飼育できる状態になる。なお、この［２］の発明において、塩化ナトリウムの混合順序は特に限定されない。 In the invention of [2], the calcium salt is added and mixed in the mixed state where the carbonate and the chelating agent are mixed. At this time, the calcium of the calcium salt forms calcium carbonate. Is preferentially formed with a chelating agent (ie, calcium ions form a chelate very easily with the chelating agent), and thus a calcium chelate is preferentially formed. Thereby, the production | generation of calcium carbonate is fully suppressed. That is, the artificial seawater composition obtained by the present production method is one in which the production of calcium carbonate is sufficiently suppressed despite containing the calcium salt and the carbonate. Therefore, the artificial seawater prepared using the obtained composition for artificial seawater does not cause white turbidity and has high transparency. Moreover, since the amount of calcium ions dissolved in artificial seawater is greatly increased by suppressing the formation of calcium carbonate, which is very difficult to dissolve in water, sufficient buffering action is obtained, and artificial seawater with little pH fluctuation is obtained. It is done. Moreover, since there is no turbidity, the ion balance is stable, and it becomes possible to breed seawater organisms immediately after artificial seawater preparation. In the invention of [2], the mixing order of sodium chloride is not particularly limited.
［３］の発明では、キレート剤としてエチレンジアミンテトラ酢酸キレートを用いるので、炭酸カルシウム塩の生成が十分に抑制された人工海水用組成物を製造することができる。 In the invention of [3], since ethylenediaminetetraacetic acid chelate is used as a chelating agent, a composition for artificial seawater in which the formation of calcium carbonate salt is sufficiently suppressed can be produced.
［４］の発明では、キレート剤としてエチレンジアミン四酢酸二ナトリウムを用いるので、炭酸カルシウム塩の生成がさらに十分に抑制された人工海水用組成物を製造することができる。 In the invention of [4], since disodium ethylenediaminetetraacetate is used as the chelating agent, it is possible to produce a composition for artificial seawater in which the formation of calcium carbonate salt is further sufficiently suppressed.
［５］の発明に係る人工海水用組成物を用いて調製した人工海水は、濁りがなく透明性に優れたものになるので、例えば海水生物等の観賞性を向上できる他、十分な緩衝作用が得られｐＨの変動が少なく、またイオンバランスも良好であり調製後直ちに海水生物を飼育できる状態になる。 Artificial seawater prepared using the composition for artificial seawater according to the invention of [5] has no turbidity and is excellent in transparency. Is obtained, and there is little fluctuation in pH, and the ion balance is good, so that seawater organisms can be bred immediately after preparation.
第１発明に係る人工海水用組成物の製造方法は、少なくとも塩化ナトリウム、カルシウム塩、炭酸塩及びキレート剤を混合して人工海水用組成物を製造するに際し、カルシウム塩とキレート剤の混合を行った後に炭酸塩の添加混合を行うことを特徴とする。 In the method for producing an artificial seawater composition according to the first invention, at least sodium chloride, calcium salt, carbonate and a chelating agent are mixed to produce an artificial seawater composition, and the calcium salt and the chelating agent are mixed. After that, the carbonate is added and mixed.
この第１発明の製造方法では、炭酸塩の添加の前に、先にカルシウム塩とキレート剤を混合するので、カルシウム塩のカルシウムがキレート剤との間でキレートを形成するものと考えられ、このカルシウムキレート（水溶性）の形成により、この後に炭酸塩が添加されても炭酸カルシウムの生成が十分に抑制される。従って、本製造方法により得られた人工海水用組成物を用いて調製された人工海水は、白い濁りが生じることがなく、透明度の高いものとなる。 In the manufacturing method of the first invention, since the calcium salt and the chelating agent are mixed before the carbonate is added, the calcium of the calcium salt is considered to form a chelate with the chelating agent. Due to the formation of calcium chelate (water-soluble), the formation of calcium carbonate is sufficiently suppressed even if a carbonate is added thereafter. Therefore, the artificial seawater prepared using the composition for artificial seawater obtained by the present production method does not cause white turbidity and has high transparency.
また、第２発明に係る人工海水用組成物の製造方法は、少なくとも塩化ナトリウム、カルシウム塩、炭酸塩及びキレート剤を混合して人工海水用組成物を製造するに際し、炭酸塩とキレート剤の混合を行った後にカルシウム塩の添加混合を行うことを特徴とする。 In addition, the method for producing a composition for artificial seawater according to the second aspect of the invention includes mixing carbonate and a chelating agent when producing a composition for artificial seawater by mixing at least sodium chloride, calcium salt, carbonate and a chelating agent. After adding, calcium salt is added and mixed.
この第２発明の製造方法は、炭酸塩とキレート剤とが混合された混合状態のところに、カルシウム塩の添加混合を行うのであるが、添加混合されたカルシウム塩のカルシウムは、炭酸カルシウムを形成するよりも優先的にキレート剤との間でキレートを形成するものと考えられ（即ちカルシウムイオンはキレート剤との間できわめてたやすくキレートを形成する）、このようにカルシウムキレート（水溶性）が優先的に形成されることで、炭酸カルシウムの生成が十分に抑制される。従って、得られた人工海水用組成物を用いて調製された人工海水は、白い濁りが生じることがなく、透明度の高いものとなる。 In the manufacturing method of the second aspect of the invention, the calcium salt is added and mixed in the mixed state where the carbonate and the chelating agent are mixed. The calcium of the added calcium salt forms calcium carbonate. It is thought that the chelate is preferentially formed with the chelating agent rather than the calcium chelate (that is, the calcium ion forms a chelate very easily with the chelating agent), and thus the calcium chelate (water-soluble) By forming preferentially, the production | generation of calcium carbonate is fully suppressed. Therefore, the artificial seawater prepared using the obtained composition for artificial seawater does not cause white turbidity and has high transparency.
この発明において、前記キレート剤としては、炭酸カルシウム塩の生成を十分に抑制できる点で、エチレンジアミンテトラ酢酸キレートを用いるのが好ましいが、特にこれに限定されるものではない。中でも、前記キレート剤としてはエチレンジアミン四酢酸二ナトリウムを用いるのが特に好ましい。 In the present invention, as the chelating agent, ethylenediaminetetraacetic acid chelate is preferably used because it can sufficiently suppress the formation of calcium carbonate salt, but is not particularly limited thereto. Among them, it is particularly preferable to use disodium ethylenediaminetetraacetate as the chelating agent.
また、前記キレート剤は、カルシウム塩に対して次のような比率範囲で混合するのが好ましい。即ち、カルシウム塩／キレート剤＝１／２〜４０／１（質量比）に設定するのが好ましい。このような比率範囲に設定することにより、低コストを維持しつつ、炭酸カルシウム塩の生成を十分に抑制することができる。 The chelating agent is preferably mixed in the following ratio range with respect to the calcium salt. That is, the calcium salt / chelating agent is preferably set to 1/2 to 40/1 (mass ratio). By setting to such a ratio range, it is possible to sufficiently suppress the production of calcium carbonate salt while maintaining low cost.
この発明の製造方法では、少なくとも塩化ナトリウム、カルシウム塩、炭酸塩及びキレート剤を混合して人工海水用組成物を製造するのであるが、これら以外に添加混合する成分としては、特に限定されないが、例えばＭｇＳＯ4、ＫＣｌ、ＭｇＣｌ2、Ｎａ2ＳＯ4等が挙げられる。また、前記カルシウム塩としては例えばＣａＣｌ2等が挙げられ、前記炭酸塩としては例えばＮａ2ＣＯ3、ＮａＨＣＯ3等が挙げられる。 In the production method of the present invention, at least sodium chloride, calcium salt, carbonate and chelating agent are mixed to produce a composition for artificial seawater, but the components to be added and mixed in addition to these are not particularly limited, For example, MgSO 4 , KCl, MgCl 2 , Na 2 SO 4 and the like can be mentioned. Examples of the calcium salt include CaCl 2 and the like, and examples of the carbonate include Na 2 CO 3 and NaHCO 3 .
しかして、ＮａＣｌ、ＭｇＳＯ4、ＫＣｌ、ＣａＣｌ2、ＭｇＣｌ2、Ｎａ2ＳＯ4、キレート剤、Ｎａ2ＣＯ3、ＮａＨＣＯ3が混合された人工海水用組成物を製造する場合において、組成物全体に対する各成分の含有割合は、ＮａＣｌ：６２〜６６質量％、ＭｇＳＯ4：２〜６質量％、ＫＣｌ：１〜４質量％、ＣａＣｌ2：１〜４質量％、ＭｇＣｌ2：１７〜２１質量％、Ｎａ2ＳＯ4：４〜８質量％、キレート剤：０．１〜２質量％、Ｎａ2ＣＯ3：０．０３〜０．０５質量％、ＮａＨＣＯ3：０．２〜０．５質量％の範囲とするのが好ましい。勿論、これら各成分以外の微量成分等の成分を含有した組成としても良い。 Thus, in the case of producing a composition for artificial seawater in which NaCl, MgSO 4 , KCl, CaCl 2 , MgCl 2 , Na 2 SO 4 , a chelating agent, Na 2 CO 3 , and NaHCO 3 are mixed, The content ratio of each component is NaCl: 62-66% by mass, MgSO 4 : 2-6% by mass, KCl: 1-4% by mass, CaCl 2 : 1-4% by mass, MgCl 2 : 17-21% by mass, Na 2 SO 4: 4 to 8 wt%, a chelating agent: 0.1 to 2 mass%, Na 2 CO 3: 0.03 to 0.05 wt%, NaHCO 3: 0.2 to 0.5 mass% The range is preferable. Of course, it is good also as a composition containing components, such as trace components other than each of these components.
また、上記のようにして製造された人工海水用組成物を水に溶解せしめて人工海水を調製する際には、水１００質量部に対して前記人工海水用組成物を３．１〜４．１質量部溶解せしめて人工海水を調製するのが良い。 Moreover, when the artificial seawater is prepared by dissolving the composition for artificial seawater produced as described above in water, the composition for artificial seawater is 3.1 to 4. It is preferable to prepare artificial seawater by dissolving 1 part by mass.
なお、この発明の製造方法において、カルシウム塩、炭酸塩及びキレート剤を除く他の添加成分（塩化ナトリウム等）については、その混合順序は特に限定されない（即ちどの段階で混合しても良い）。 In addition, in the manufacturing method of this invention, about the other addition components (sodium chloride etc.) except calcium salt, carbonate, and a chelating agent, the mixing order is not specifically limited (that is, you may mix in any step).
次に、この発明の具体的実施例について説明するが、本発明はこれら実施例のものに特に限定されるものではない。 Next, specific examples of the present invention will be described, but the present invention is not particularly limited to these examples.
＜実施例１＞
容器内に、ＮａＣｌを６４．０００質量部、ＭｇＳＯ4を４．２９３質量部、ＫＣｌを２．１９６質量部、ＣａＣｌ2を２．４３９質量部、ＭｇＣｌ2を１９．５１６質量部、Ｎａ2ＳＯ4を６．５８７質量部この順に入れて攪拌混合した後、エチレンジアミン４酢酸ナトリウムを０．５８０質量部添加して攪拌混合し、次いでさらにＮａ2ＣＯ3を０．０３９質量部、ＮａＨＣＯ3を０．２４４質量部この順に入れて攪拌混合することによって、人工海水用組成物を得た。なお、各成分としては、いずれも粉末状のものを用いた。
<Example 1>
In the container, 64.000 parts by mass of NaCl, 4.293 parts by mass of MgSO 4 , 2.196 parts by mass of KCl, 2.439 parts by mass of CaCl 2 , 19.516 parts by mass of MgCl 2 , Na 2 SO 4 after stirring mixture placed in a 6.587 weight parts this order, followed by stirring and mixing with a sodium ethylene diamine tetraacetate were added 0.580 parts by mass, 0.039 parts by mass further Na 2 CO 3 then NaHCO 3 0 .244 parts by mass A composition for artificial seawater was obtained by mixing in this order and stirring and mixing. In addition, as each component, all used the powdery thing.
得られた人工海水用組成物３６ｇを純水１０００ｇに溶解せしめて人工海水を調製したところ、この人工海水に白濁は生じておらず、透明であった。 When the artificial seawater was prepared by dissolving 36 g of the obtained composition for artificial seawater in 1000 g of pure water, the artificial seawater had no white turbidity and was transparent.
＜実施例２＞
容器内に、ＮａＣｌを６４．０００質量部、ＭｇＳＯ4を４．２９３質量部、ＫＣｌを２．１９６質量部、Ｎａ2ＣＯ3を０．０３９質量部、ＮａＨＣＯ3を０．２４４質量部、ＭｇＣｌ2を１９．５１６質量部、Ｎａ2ＳＯ4を６．５８７質量部この順に入れて攪拌混合した後、エチレンジアミン４酢酸ナトリウムを０．５８０質量部添加して攪拌混合し、次いでさらにＣａＣｌ2を２．４３９質量部入れて攪拌混合することによって、人工海水用組成物を得た。なお、各成分としては、いずれも粉末状のものを用いた。
<Example 2>
Into the container, 64.000 parts by weight of NaCl, 4.293 parts by weight of MgSO 4, 2.196 parts by weight of KCl, 0.039 parts by mass of Na 2 CO 3, a NaHCO 3 0.244 parts by mass, MgCl 2 19.516 parts by weight, stirred mixture placed over Na 2 SO 4 to 6.587 parts by weight in this order, and mixed by stirring. of sodium ethylene diamine tetraacetate were added 0.580 parts by mass, then further CaCl 2 2 The composition for artificial seawater was obtained by adding 439 mass parts and stirring and mixing. In addition, as each component, all used the powdery thing.
得られた人工海水用組成物３６ｇを純水１０００ｇに溶解せしめて人工海水を調製したところ、この人工海水に白濁は生じておらず、透明であった。 When the artificial seawater was prepared by dissolving 36 g of the obtained composition for artificial seawater in 1000 g of pure water, the artificial seawater had no white turbidity and was transparent.
＜比較例１＞
容器内に、ＮａＣｌを６４．０００質量部、ＭｇＳＯ4を４．２９３質量部、ＫＣｌを２．１９６質量部、ＣａＣｌ2を２．４３９質量部、ＭｇＣｌ2を１９．５１６質量部、Ｎａ2ＳＯ4を６．５８７質量部、Ｎａ2ＣＯ3を０．０３９質量部、ＮａＨＣＯ3を０．２４４質量部この順に入れて攪拌混合することによって、人工海水用組成物を得た。なお、各成分としては、いずれも粉末状のものを用いた。
<Comparative Example 1>
In the container, 64.000 parts by mass of NaCl, 4.293 parts by mass of MgSO 4 , 2.196 parts by mass of KCl, 2.439 parts by mass of CaCl 2 , 19.516 parts by mass of MgCl 2 , Na 2 SO 4 6.587 part by weight, Na 2 CO 3 0.039 parts by mass, by stirring and mixing putting NaHCO 3 0.244 parts by mass in this order to give the artificial seawater composition. In addition, as each component, all used the powdery thing.
得られた人工海水用組成物３６ｇを純水１０００ｇに溶解せしめて人工海水を調製したところ、この人工海水は少し白く濁っており十分な透明性が得られなかった。 When artificial seawater was prepared by dissolving 36 g of the obtained composition for artificial seawater in 1000 g of pure water, the artificial seawater was slightly white and cloudy, and sufficient transparency was not obtained.
＜比較例２＞
容器内に、ＮａＣｌを６４．０００質量部、ＭｇＳＯ4を４．２９３質量部、ＫＣｌを２．１９６質量部、ＣａＣｌ2を２．４３９質量部、ＭｇＣｌ2を１９．５１６質量部、Ｎａ2ＳＯ4を６．５８７質量部、Ｎａ2ＣＯ3を０．０３９質量部、ＮａＨＣＯ3を０．２４４質量部この順に入れて攪拌混合した後、エチレンジアミン４酢酸ナトリウムを０．５８０質量部添加して攪拌混合することによって、人工海水用組成物を得た。なお、各成分としては、いずれも粉末状のものを用いた。
<Comparative example 2>
In the container, 64.000 parts by mass of NaCl, 4.293 parts by mass of MgSO 4 , 2.196 parts by mass of KCl, 2.439 parts by mass of CaCl 2 , 19.516 parts by mass of MgCl 2 , Na 2 SO 4 was added to 6.587 parts by mass, Na 2 CO 3 was added to 0.039 parts by mass, and NaHCO 3 was added to 0.244 parts by mass in this order. After stirring and mixing, 0.580 parts by mass of sodium ethylenediaminetetraacetate was added and stirred. The composition for artificial seawater was obtained by mixing. In addition, as each component, all used the powdery thing.
得られた人工海水用組成物３６ｇを純水１０００ｇに溶解せしめて人工海水を調製したところ、この人工海水は少し白く濁っており十分な透明性が得られなかった。 When artificial seawater was prepared by dissolving 36 g of the obtained composition for artificial seawater in 1000 g of pure water, the artificial seawater was slightly white and cloudy, and sufficient transparency was not obtained.
Claims (5)
カルシウム塩とキレート剤の混合を行った後に、炭酸塩の添加混合を行い、
カルシウム塩／キレート剤＝１／２〜４０／１（質量比）の比率範囲に設定することを特徴とする人工海水用組成物の製造方法。 When producing a composition for artificial seawater by mixing at least sodium chloride, calcium salt, carbonate and chelating agent,
After the mixture of the calcium salt and a chelating agent, it has rows admixing of carbonate,
A method for producing a composition for artificial seawater, characterized in that the ratio is set to a ratio of calcium salt / chelating agent = 1/2 to 40/1 (mass ratio) .
炭酸塩とキレート剤の混合を行った後に、カルシウム塩の添加混合を行い、
カルシウム塩／キレート剤＝１／２〜４０／１（質量比）の比率範囲に設定することを特徴とする人工海水用組成物の製造方法。 When producing a composition for artificial seawater by mixing at least sodium chloride, calcium salt, carbonate and chelating agent,
After the mixture of carbonate and a chelating agent, it has rows admixing calcium salts,
A method for producing a composition for artificial seawater, characterized in that the ratio is set to a ratio of calcium salt / chelating agent = 1/2 to 40/1 (mass ratio) .
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