JP2005180938A - Method for analyzing (1-hydroxyethylidene)bis-phosphonate - Google Patents

Method for analyzing (1-hydroxyethylidene)bis-phosphonate Download PDF

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JP2005180938A
JP2005180938A JP2003417722A JP2003417722A JP2005180938A JP 2005180938 A JP2005180938 A JP 2005180938A JP 2003417722 A JP2003417722 A JP 2003417722A JP 2003417722 A JP2003417722 A JP 2003417722A JP 2005180938 A JP2005180938 A JP 2005180938A
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hydroxyethylidene
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JP4300104B2 (en
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Shino Inoue
紫乃 井上
喜久雄 ▲高▼寺
Kikuo Takadera
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Sumitomo Pharmaceuticals Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an elution testing method of an oral agent containing (1-hydroyethylidene)bis-phosphonate or its salt as an effective component. <P>SOLUTION: In the elution testing method of the oral agent containing (1-hydroxyethylidene)bis-phosphonate or its salt as the effective component, a column packed with an anion exchange resin as a filler is used under a condition of the number of theoretical plates of ≥2,500 and a degree of separation of ≥2.0 and a change in electric conductivity is sensed to separate (1-hydroxyethylidene)bis-phosphonate, a phosphoric acid and citric acid to analyze (1-hydroxyethylidene)bis-phosphonate. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩の新規な分析方法に関する。   The present invention relates to a novel method for analyzing (1-hydroxyethylidene) bisphosphonate or a salt thereof.

(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩は、二つのC−P結合を有することを特徴とする化合物である。(1−ヒドロキシエチリデン)ビス−フォスフォネート・2ナトリウム塩は強力に骨吸収を抑制する化合物群として知られている。(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩は、in vitroにおいて、細胞培養や器官培養において、さまざまな手段によって引き起こされた骨吸収を抑制する。前者においては破骨細胞による石灰化組織上での小窩(pit)の形成を抑制する。また器官培養においては、胎仔長管骨や、新生仔頭蓋冠における骨吸収を減少させることが知られている。副甲状腺ホルモン、カルシトリオール、プロスタグランジン、腫瘍細胞などの骨吸収刺激物質の作用が(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩によって抑制されることが知られている。
また(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩は成長期の動物において、一次骨梁と二次骨梁の吸収を抑制し、骨幹端のモデリングとリモデリングを停止させることが知られており、骨吸収が亢進したパジェット病、腫瘍随伴性骨疾患、骨粗鬆症の患者に応用されている。
(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩は、通常のUV検知法で使用される波長に範囲には、ほとんど吸光度が無いため測定が困難であった。そこで、特許文献1には、ニッケル等の金属とキレートを形成させ測定する方法が提案されている。しかし、非特許文献1の「後発医薬品の生物学的同等性試験ガイドライン」に記載されている試験液である「薄めたMcIlvaineの緩衝液」で溶出試験を実施するとき、試験液中のクエン酸と銅がキレートを形成するため、特許文献1の方法は適用できなかった。
また、非特許文献2には、同じビスフォスフォネート化合物である、(ジクロロメチレン)ビス−フォスフォネートをイオンクロマトグラフを用いて分析する方法が提案されている。しかしこの方法では、分析時間が長いため、多数のサンプルを分析する溶出試験の試験法として適していなかった。
特開2002−5893 「後発医薬品の生物学的同等性試験ガイドライン」平成13年5月31日 医薬審発第786号 Determination of impurities in clodronic acid by anion-exchange chromatograpy. G.E.Taylor Journal of Chromatography A, 770(1997)261-271
(1-Hydroxyethylidene) bis-phosphonate or a salt thereof is a compound having two CP bonds. (1-Hydroxyethylidene) bis-phosphonate disodium salt is known as a group of compounds that strongly inhibit bone resorption. (1-Hydroxyethylidene) bis-phosphonate or a salt thereof suppresses bone resorption caused by various means in cell culture and organ culture in vitro. In the former, the formation of pits on the calcified tissue by osteoclasts is suppressed. In organ culture, it is known to reduce bone resorption in fetal long bone and neonatal calvaria. It is known that the action of bone resorption stimulants such as parathyroid hormone, calcitriol, prostaglandins, tumor cells and the like is suppressed by (1-hydroxyethylidene) bis-phosphonate or a salt thereof.
In addition, (1-hydroxyethylidene) bis-phosphonate or its salt is known to suppress the resorption of primary and secondary trabeculae and stop metaphyseal modeling and remodeling in growing animals. It is applied to patients with Paget's disease, paraneoplastic bone disease and osteoporosis with increased bone resorption.
(1-Hydroxyethylidene) bisphosphonate or a salt thereof was difficult to measure because there was almost no absorbance in the range of wavelengths used in ordinary UV detection methods. Therefore, Patent Document 1 proposes a method of forming a chelate with a metal such as nickel and measuring it. However, when the dissolution test is performed with the “diluted McIlvaine buffer”, which is the test solution described in “Guidelines for bioequivalence testing of generic drugs” in Non-Patent Document 1, citric acid in the test solution Since copper and chelate form a chelate, the method of Patent Document 1 cannot be applied.
Non-Patent Document 2 proposes a method for analyzing (dichloromethylene) bis-phosphonate, which is the same bisphosphonate compound, using an ion chromatograph. However, this method is not suitable as a dissolution test method for analyzing a large number of samples because of the long analysis time.
JP2002-5893 “Guidelines for Testing Bioequivalence of Generic Drugs” May 31, 2001, Pharmaceutical Examination No.786 Determination of impurities in clodronic acid by anion-exchange chromatograpy.GETaylor Journal of Chromatography A, 770 (1997) 261-271

本発明の課題は、緩衝液の成分に関わらず、(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を簡便・迅速に分析する方法の提供にある。   An object of the present invention is to provide a method for simply and rapidly analyzing (1-hydroxyethylidene) bisphosphonate or a salt thereof regardless of the components of the buffer solution.

本発明者は、上記課題を解決するために鋭意検討した結果、特定の溶離液とその濃度勾配法で、(1−ヒドロキシエチリデン)ビス−フォスフォネートとMcIlvaineの緩衝液中のリン酸及びクエン酸を分離できることを見いだし、更に検討した結果、本発明を完成するに至った。
すなわち本発明は:
1. (1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を有効成分とする経口剤の溶出試験法であって、理論段数2500以上、分離度2.0以上の条件で、陰イオン交換樹脂を充填剤とするカラムを用い、(1−ヒドロキシエチリデン)ビス−フォスフォネートとリン酸及びクエン酸を分離することを特徴とする(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
2. 分析時間が15分以内である1.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
3. 陰イオン交換樹脂を充填剤とするカラムの温度が25〜50℃である1.または2.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
4. 陰イオン交換樹脂を充填剤とするカラムの温度が25〜40℃である1.または2.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
5. 陰イオン交換樹脂が親水性である1.〜4.のいずれかに記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
6. 陰イオン交換樹脂を充填剤とするカラムがイオンパック(登録商標)5Sである1.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
7. 溶離液として水酸化ナトリウム水溶液を用い、水酸化ナトリウム水溶液の濃度勾配を20〜44mmol/Lから60mmol/Lに4.5〜7分間で変化させ、60mMで1.5〜3分間保ち溶出する請求項1記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。
8. (1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を有効成分とする経口剤の溶出試験法であって:
(1)陰イオン交換樹脂を充填剤とするカラムを用い、
(2)溶離液として水酸化ナトリウム水溶液を用い、
(3)流速を0.8〜1.2mL/分とし、
(4)水酸化ナトリウム水溶液の濃度勾配を20〜44mmol/Lから60mmol/Lに4.5〜7分間で変化させ、60mMで1.5〜3分間保ち溶出し、
(1−ヒドロキシエチリデン)ビス−フォスフォネートとリン酸及びクエン酸を分離することを特徴とする(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。
9. 陰イオン交換樹脂が、無孔性樹脂からなるコアの表面がスルホン化され、該コアの表面に4級アルカノールアミンで修飾されたマイクロビーズ(登録商標)が付着したものである8.記載の分析方法;
10. 陰イオン交換樹脂を充填剤とするカラムがイオンパック(登録商標)5Sである7.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。
11. カラム温度が25〜50℃の範囲である8.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
12. 溶出液が薄めたMcIlvaineの緩衝液である1.〜11.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;
13. 薄めたMcIlvaineの緩衝液のpHが3.0〜7.5の範囲である12.記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法;等
に関する。
As a result of intensive studies to solve the above problems, the present inventor, as a result of using a specific eluent and its concentration gradient method, phosphate and citrate in a buffer solution of (1-hydroxyethylidene) bis-phosphonate and McIlvaine As a result of finding out that the acid can be separated and further studying it, the present invention has been completed.
That is, the present invention:
1. Dissolution test method for oral preparations containing (1-hydroxyethylidene) bisphosphonate or its salt as an active ingredient, filled with anion exchange resin under conditions of 2500 or more theoretical plates and 2.0 or more resolution A method for analyzing (1-hydroxyethylidene) bis-phosphonate, which comprises separating (1-hydroxyethylidene) bis-phosphonate from phosphoric acid and citric acid using a column as an agent;
2. 1. Analysis time is within 15 minutes A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
3. 1. The temperature of the column using an anion exchange resin as a filler is 25 to 50 ° C. Or 2. A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
4). 1. The temperature of the column using an anion exchange resin as a filler is 25 to 40 ° C. Or 2. A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
5). 1. Anion exchange resin is hydrophilic ~ 4. A method for analyzing (1-hydroxyethylidene) bis-phosphonate according to any of the above;
6). A column having an anion exchange resin as a filler is IONPACK (registered trademark) 5S. A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
7). A sodium hydroxide aqueous solution is used as an eluent, the concentration gradient of the sodium hydroxide aqueous solution is changed from 20 to 44 mmol / L to 60 mmol / L in 4.5 to 7 minutes, and elution is carried out while maintaining at 60 mM for 1.5 to 3 minutes. Item 2. A method for analyzing (1-hydroxyethylidene) bisphosphonate according to Item 1.
8). A dissolution test method for oral preparations comprising (1-hydroxyethylidene) bis-phosphonate or a salt thereof as an active ingredient:
(1) Using a column with an anion exchange resin as a filler,
(2) A sodium hydroxide aqueous solution is used as an eluent,
(3) The flow rate is 0.8 to 1.2 mL / min,
(4) The concentration gradient of the sodium hydroxide aqueous solution is changed from 20 to 44 mmol / L to 60 mmol / L in 4.5 to 7 minutes, and is eluted at 60 mM for 1.5 to 3 minutes,
A method for analyzing (1-hydroxyethylidene) bisphosphonate, comprising separating (1-hydroxyethylidene) bisphosphonate from phosphoric acid and citric acid.
9. 7. An anion exchange resin is one in which the surface of a core made of a nonporous resin is sulfonated and microbeads (registered trademark) modified with a quaternary alkanolamine are attached to the surface of the core. The analytical method described;
10. 6. A column using an anion exchange resin as a filler is IONPACK (registered trademark) 5S. Method for analyzing (1-hydroxyethylidene) bis-phosphonates as described.
11. 7. Column temperature is in the range of 25-50 ° C. A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
12 1. The eluate is a diluted McIlvaine buffer. ~ 11. A method for the analysis of (1-hydroxyethylidene) bis-phosphonates as described;
13. 11. The pH of the diluted McIlvaine buffer is in the range of 3.0 to 7.5. The analysis method of (1-hydroxyethylidene) bis-phosphonate of description;

本発明により(1−ヒドロキシエチリデン)ビス−フォスフォネートとMcIlvaineの緩衝液中のリン酸及びクエン酸を分離でき、「後発医薬品の生物学的同等性試験ガイドライン」に記載されている試験液である「薄めたMcIlvaineの緩衝液」を用いた溶出試験での定量分析が可能となった。   According to the present invention, phosphoric acid and citric acid in (1-hydroxyethylidene) bis-phosphonate and McIlvaine buffer can be separated. Quantitative analysis in a dissolution test using a certain “thinned buffer of McIlvaine” became possible.

理論段数と分離度の定義については、第十四改正日本薬局方に記載されている。
理論段数とは、カラム中における物質のバンドの広がりの度合いを示す値である。具体的には、(1−ヒドロキシエチリデン)ビス−フォスフォネートの理論段数を指す。更に具体的には、下記の式で定義される。
The definitions of the number of theoretical plates and the degree of separation are described in the 14th revision Japanese Pharmacopoeia.
The number of theoretical plates is a value indicating the degree of broadening of the substance band in the column. Specifically, it refers to the number of theoretical plates of (1-hydroxyethylidene) bis-phosphonate. More specifically, it is defined by the following formula.

Figure 2005180938
Figure 2005180938

分離度とは、クロマトグラム上のピーク相互の保持時間とそれぞれのピーク幅との関係を示すものである。具体的には、クエン酸と(1−ヒドロキシエチリデン)ビス−フォスフォネートの分離度を指す。更に具体的には、下記式で定義される。   The resolution indicates the relationship between the retention times of peaks on the chromatogram and the respective peak widths. Specifically, it refers to the degree of separation between citric acid and (1-hydroxyethylidene) bis-phosphonate. More specifically, it is defined by the following formula.

Figure 2005180938
本発明の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析法においては、理論段数2500以上、分離度2.0以上の条件から選択される。更に、好ましくは理論段数3000以上、分離度2.2以上の条件が選択される。
Figure 2005180938
In the analysis method of (1-hydroxyethylidene) bis-phosphonate of the present invention, it is selected from the conditions of 2500 or more theoretical plates and 2.0 or more of separation. Further, preferably, conditions with a theoretical plate number of 3000 or more and a degree of separation of 2.2 or more are selected.

本発明に使用できる薄めたMcIlvaineの緩衝液とは、リン酸1水素二ナトリウム水溶液とクエン酸水溶液を用いてpHを調整したものである。
薄めたMcIlvaineの緩衝液のpHは、3.0〜7.5、好ましくは5.5〜7.5の範囲のものが挙げられる。
薄めたMcIlvaineの緩衝液の調製に用いるリン酸1水素二ナトリウム水溶液の濃度は、0.01〜0.05mol/L、クエン酸水溶液の濃度は、0.005〜0.025mol/Lの範囲のものが挙げられる。
更に具体的には、リン酸1水素二ナトリウム水溶液の濃度は、0.05mol/L、クエン酸水溶液の濃度は、0.025mol/Lを用いてpHを調整したものが挙げられる。
The diluted McIlvaine buffer that can be used in the present invention is one in which pH is adjusted using a disodium monohydrogen phosphate aqueous solution and a citric acid aqueous solution.
The pH of the diluted McIlvaine buffer is 3.0 to 7.5, preferably 5.5 to 7.5.
The concentration of the disodium monohydrogen phosphate aqueous solution used for the preparation of the diluted McIlvaine buffer solution is 0.01 to 0.05 mol / L, and the concentration of the citric acid aqueous solution is 0.005 to 0.025 mol / L. Things.
More specifically, the concentration of the disodium monohydrogen phosphate aqueous solution is 0.05 mol / L, and the concentration of the citric acid aqueous solution is 0.025 mol / L.

本発明に用いられるイオンクロマトグラフ法の陰イオン交換樹脂を充填剤とするカラムとしては、陰イオン交換樹脂が、無孔性樹脂からなるコアの表面がスルホン化され、該コアの表面に4級アルカノールアミンで修飾されたマイクロビーズ(登録商標)が付着したもの等が挙げられる。陰イオン交換樹脂は親水性のものが好ましい。具体的には、例えば、ダイオネクス社からIonpac(登録商標) AS5が市販されているものが挙げられる。カラムの形状は、内径4.0 mm、長さ250 mm、陰イオン交換樹脂の粒径が15mmであることが望ましい。
本発明に用いられるイオンクロマトグラフ法のカラム温度は25〜50 ℃の範囲から選択される。好ましくは25〜40℃の範囲から選択される。
As a column using an anion exchange resin of the ion chromatography method used in the present invention as a filler, an anion exchange resin is sulfonated on the surface of a core made of a non-porous resin, and a quaternary is formed on the surface of the core. Examples include those to which microbeads (registered trademark) modified with alkanolamine are attached. The anion exchange resin is preferably hydrophilic. Specifically, for example, Ionpac (registered trademark) AS5 is commercially available from Dionex. As for the shape of the column, it is desirable that the inner diameter is 4.0 mm, the length is 250 mm, and the particle size of the anion exchange resin is 15 mm.
The column temperature of the ion chromatography method used in the present invention is selected from the range of 25 to 50 ° C. Preferably, it is selected from the range of 25 to 40 ° C.

溶離液としては、水酸化ナトリウム水溶液が用いられる。
本発明に用いられるイオンクロマトグラフ法の水酸化ナトリウム水溶液の濃度勾配は、20〜44mmol/Lを4.5から7分間で60mMまで変化させ、60mMで1.5から4分間保つ条件、好ましくは、28mmol/Lを5分間で60mMまで変化させ、60mMで2分間保つ条件が挙げられる。
流量としては、0.8〜1.2mL/分の範囲から選択される。具体的には1mLが挙げられる。
As an eluent, a sodium hydroxide aqueous solution is used.
The concentration gradient of the sodium hydroxide aqueous solution used in the present invention for ion chromatography is a condition in which 20 to 44 mmol / L is changed from 4.5 to 7 minutes to 60 mM and kept at 60 mM for 1.5 to 4 minutes, preferably , 28 mmol / L can be changed to 60 mM in 5 minutes and kept at 60 mM for 2 minutes.
The flow rate is selected from the range of 0.8 to 1.2 mL / min. Specifically, 1 mL is mentioned.

検出器としては、(1−ヒドロキシエチリデン)ビス−フォスフォネートにはほとんどUV吸収が無いことから、電気伝導度検出器を用いることが好ましい。具体的には、例えば、ダイオネクス社製電気化学検出器ED-40型等が挙げられる。
また、分離カラムの後、サプレッサーを通し、溶離液中のナトリウムイオンを水素イオンに交換し、バックグランドを下げて、S/N比を上げて検出器に送ることが好ましい。具体的には、例えば、ダイオネクス社製オートサプレッサーASRS-ULTRA,4mm等が挙げられる。
As a detector, it is preferable to use an electrical conductivity detector because (1-hydroxyethylidene) bisphosphonate has almost no UV absorption. Specifically, for example, an electrochemical detector ED-40 type manufactured by Dionex Co., Ltd. may be mentioned.
Further, after the separation column, it is preferable to pass a suppressor, exchange sodium ions in the eluent with hydrogen ions, lower the background, increase the S / N ratio, and send it to the detector. Specific examples include an auto suppressor ASRS-ULTRA, 4 mm manufactured by Dionex.

イオンクロマトグラフに使用される具体的な装置としては、例えば、ダイオネクス社製 DX-500型(ポンプ: グラジェントポンプGP-50型、オートサンプラー:オートサンプラー AS-3500型、カラムオーブン:クロマトグラフィーオーブンLC-30型、検出器:電気化学検出器ED-40型、オートサプレッサー: ASRS-ULTRA, 4 mm)が挙げられる。   Specific equipment used for ion chromatography is, for example, DX-500 type (Pump: Gradient pump GP-50 type, Autosampler: Autosampler AS-3500 type, Column oven: Chromatography oven LC-30 type, detector: electrochemical detector ED-40 type, auto suppressor: ASRS-ULTRA, 4 mm).

本発明の分析法に使用される溶出試験装置は、日本薬局法に定められる溶出試験装置を用いることが望ましいが、米国薬局方による装置でも、実験用ビーカーを応用した装置でも差し支えない。日本薬局方に準拠した装置としては、例えば富山産業株式会社製NTR-VS6P, NTR-6000を使用できる。放出液の量は、薬物の性質に応じて適宜選択されるが、通常は500〜900mLである。また、溶出試験に使用する溶媒は、pHの調整したMcIlvaine緩衝液等を用いることができる。
試験温度は剤の性質に応じて適宜選択されるが、通常25〜38℃の範囲から選択される。
As the dissolution test apparatus used in the analysis method of the present invention, it is desirable to use a dissolution test apparatus defined in the Japanese Pharmacopoeia Law, but it may be an apparatus according to the US Pharmacopoeia or an apparatus to which an experimental beaker is applied. For example, NTR-VS6P, NTR-6000 manufactured by Toyama Sangyo Co., Ltd. can be used as a device conforming to the Japanese Pharmacopoeia. The amount of the release liquid is appropriately selected depending on the properties of the drug, but is usually 500 to 900 mL. In addition, as a solvent used in the dissolution test, a pH adjusted McIlvaine buffer or the like can be used.
The test temperature is appropriately selected depending on the properties of the agent, but is usually selected from the range of 25 to 38 ° C.

(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を有効成分とする経口剤としては、例えば、ダイドロネル(登録商標)が挙げられる。   As an oral preparation containing (1-hydroxyethylidene) bisphosphonate or a salt thereof as an active ingredient, for example, Didronel (registered trademark) can be mentioned.

以下に実施例を挙げて本発明をさらに詳細に説明するが、本発明はこれらの実施例に何ら限定されるものではない。   The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples.

(1−ヒドロキシエチリデン)ビス−フォスフォネート標準品を210℃で2時間乾燥し、その約22mgを精密に量り、pH5.5の薄めたMcIlvaine緩衝液(0.05mol/Lリン酸1水素二ナトリウムと0.025mol/Lクエン酸を用いてpH5.5に調整する)に溶かし、正確に100mLとし、標準溶液とした。標準溶液につき、溶離液、流量及びカラム温度の条件を表1のとおりに変更し、検出器、オートサプレッサー、分析カラム、ガードカラム、アニオントラップカラム、注入量については表2に示す条件でイオンクロマトグラフ法により試験を行った。クエン酸及び(1−ヒドロキシエチリデン)ビス−フォスフォネートの保持時間、ピーク面積、ピーク高さの中点におけるピーク幅を測定し、理論段数及び分離度を次式により求めた。イオンクロマトグラフは、ダイオネクス社製 DX-500型(ポンプ: グラジェントポンプGP-50型、オートサンプラー:オートサンプラー AS-3500型、カラムオーブン:クロマトグラフィーオーブンLC-30型、検出器:電気化学検出器ED-40型、オートサプレッサー: ASRS-ULTRA, 4 mm)を用いた。 (1-Hydroxyethylidene) bis-phosphonate standard was dried at 210 ° C. for 2 hours, about 22 mg of which was precisely weighed and diluted to pH 5.5 with a diluted McIlvaine buffer (0.05 mol / L dihydrogen phosphate Adjust to pH 5.5 using sodium and 0.025 mol / L citric acid) to make exactly 100 mL and use as standard solution. For the standard solution, the eluent, flow rate, and column temperature conditions were changed as shown in Table 1, and the detector, auto suppressor, analytical column, guard column, anion trap column, and injection volume were ion chromatographed under the conditions shown in Table 2. The test was performed by the graph method. The retention time, peak area, and peak width at the midpoint of the peak height of citric acid and (1-hydroxyethylidene) bisphosphonate were measured, and the number of theoretical plates and the resolution were determined by the following equations. The ion chromatograph is a DX-500 model manufactured by Dionex (pump: gradient pump GP-50, autosampler: autosampler AS-3500, column oven: chromatography oven LC-30, detector: electrochemical detection ED-40 model, auto suppressor: ASRS-ULTRA, 4 mm) was used.

Figure 2005180938
Figure 2005180938

Figure 2005180938
Figure 2005180938

Figure 2005180938
Figure 2005180938

Figure 2005180938
Figure 2005180938

実施例1の結果を表3及び図1〜8に示す。いずれにおいても、理論段数及び分離度は良好であり、分析時間12分の迅速な測定が可能であった。   The results of Example 1 are shown in Table 3 and FIGS. In any case, the number of theoretical plates and the resolution were good, and a rapid measurement with an analysis time of 12 minutes was possible.

Figure 2005180938
Figure 2005180938

比較例1
溶離液、流量及びカラム温度の条件については、表4のとおりに条件を変更し、検出器、オートサプレッサー、分析カラム、ガードカラム、アニオントラップカラム、注入量は表2のとおりに、その他は実施例1と同様の方法で試験を行った。
Comparative Example 1
The eluent, flow rate, and column temperature conditions were changed as shown in Table 4, and the detector, auto suppressor, analytical column, guard column, anion trap column, injection volume were as shown in Table 2, and the others were performed. The test was conducted in the same manner as in Example 1.

Figure 2005180938
Figure 2005180938

比較例1の結果を表5及び図9〜11に示す。条件9は非特許文献2の試験条件であり、分析時間が35分であった。条件10では(1−ヒドロキシエチリデン)ビス−フォスフォネートとクエン酸が分離しなかった。条件11では、じゅうぶんな理論段数及び分離度が得られなかった。   The results of Comparative Example 1 are shown in Table 5 and FIGS. Condition 9 was the test condition of Non-Patent Document 2, and the analysis time was 35 minutes. Under condition 10, (1-hydroxyethylidene) bis-phosphonate and citric acid were not separated. Under condition 11, a sufficient number of theoretical plates and resolution could not be obtained.

Figure 2005180938
Figure 2005180938

比較例2
溶離液、流量及びカラム温度の条件については、表6のとおりに条件を変更し、検出器、オートサプレッサー、分析カラム、ガードカラム、アニオントラップカラム、注入量は表7のとおりに、その他は実施例1と同様の方法で試験を行った。
Comparative Example 2
The conditions of eluent, flow rate and column temperature were changed as shown in Table 6. Detector, auto suppressor, analytical column, guard column, anion trap column, injection volume were as shown in Table 7, and others were performed. The test was conducted in the same manner as in Example 1.

Figure 2005180938
Figure 2005180938

Figure 2005180938
Figure 2005180938

比較例2の結果を表8及び図12〜16に示す。条件10では(1−ヒドロキシエチリデン)ビス−フォスフォネートとクエン酸が分離しなかった。その他の条件では充分な分離度及び理論段数が得られなかった。   The results of Comparative Example 2 are shown in Table 8 and FIGS. Under condition 10, (1-hydroxyethylidene) bis-phosphonate and citric acid were not separated. Under other conditions, sufficient resolution and the number of theoretical plates could not be obtained.

Figure 2005180938
Figure 2005180938

条件1のイオンクロマトグラムクロマトグラム中、Aはリン酸、Bはクエン酸、Cは(1−ヒドロキシエチリデン)ビス−フォスフォネートを指す。以下も同様。In the ion chromatogram chromatogram of Condition 1, A indicates phosphoric acid, B indicates citric acid, and C indicates (1-hydroxyethylidene) bis-phosphonate. The same applies to the following. 条件2のイオンクロマトグラムCondition 2 ion chromatogram 条件3のイオンクロマトグラムCondition 3 ion chromatogram 条件4のイオンクロマトグラムCondition 4 ion chromatogram 条件5のイオンクロマトグラムCondition 5 ion chromatogram 条件6のイオンクロマトグラムCondition 6 ion chromatogram 条件7のイオンクロマトグラムCondition 7 ion chromatogram 条件8のイオンクロマトグラムCondition 8 ion chromatogram 条件9のイオンクロマトグラムCondition 9 ion chromatogram 条件10のイオンクロマトグラムCondition 10 ion chromatogram 条件11のイオンクロマトグラムCondition 11 ion chromatogram 条件12のイオンクロマトグラムCondition 12 ion chromatogram 条件13のイオンクロマトグラムCondition 13 ion chromatogram 条件14のイオンクロマトグラムCondition 14 ion chromatogram 条件15のイオンクロマトグラムCondition 15 ion chromatogram 条件16のイオンクロマトグラムCondition 16 ion chromatogram

Claims (11)

(1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を有効成分とする経口剤の溶出試験法であって、理論段数2500以上、分離度2.0以上の条件で、陰イオン交換樹脂を充填剤とするカラムを用い、(1−ヒドロキシエチリデン)ビス−フォスフォネートとリン酸及びクエン酸を分離することを特徴とする(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   Dissolution test method for oral preparations containing (1-hydroxyethylidene) bisphosphonate or its salt as an active ingredient, filled with anion exchange resin under conditions of 2500 or more theoretical plates and 2.0 or more resolution A method for analyzing (1-hydroxyethylidene) bis-phosphonate, comprising separating a (1-hydroxyethylidene) bisphosphonate from phosphoric acid and citric acid using a column as an agent. 分析時間が15分以内である請求項1記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   The method for analyzing (1-hydroxyethylidene) bis-phosphonate according to claim 1, wherein the analysis time is within 15 minutes. 陰イオン交換樹脂を充填剤とするカラムの温度が25〜50℃である請求項1または2記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   The method for analyzing (1-hydroxyethylidene) bisphosphonate according to claim 1 or 2, wherein the temperature of the column containing an anion exchange resin as a filler is 25 to 50 ° C. 陰イオン交換樹脂を充填剤とするカラムの温度が25〜40℃である請求項1または2記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   The method for analyzing (1-hydroxyethylidene) bisphosphonate according to claim 1 or 2, wherein the temperature of the column using an anion exchange resin as a filler is 25 to 40 ° C. 陰イオン交換樹脂が親水性である請求項1〜4のいずれかに記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   The method for analyzing (1-hydroxyethylidene) bis-phosphonate according to claim 1, wherein the anion exchange resin is hydrophilic. 陰イオン交換樹脂を充填剤とするカラムがイオンパック(登録商標)5Sである請求項1記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   The method for analyzing (1-hydroxyethylidene) bis-phosphonate according to claim 1, wherein the column using an anion exchange resin as a filler is IONPACK (registered trademark) 5S. 溶離液として水酸化ナトリウム水溶液を用い、水酸化ナトリウム水溶液の濃度勾配を20〜44mmol/Lから60mmol/Lに4.5〜7分間で変化させ、60mMで1.5〜3分間保ち溶出する請求項1記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   A sodium hydroxide aqueous solution is used as an eluent, the concentration gradient of the sodium hydroxide aqueous solution is changed from 20 to 44 mmol / L to 60 mmol / L in 4.5 to 7 minutes, and elution is carried out while maintaining at 60 mM for 1.5 to 3 minutes. Item 2. A method for analyzing (1-hydroxyethylidene) bisphosphonate according to Item 1. (1−ヒドロキシエチリデン)ビス−フォスフォネートまたはその塩を有効成分とする経口剤の溶出試験法であって:
(1)陰イオン交換樹脂を充填剤とするカラムを用い、
(2)溶離液として水酸化ナトリウム水溶液を用い、
(3)流速を0.8〜1.2mL/分とし、
(4)水酸化ナトリウム水溶液の濃度勾配を20〜44mmol/Lから60mmol/Lに4.5〜7分間で変化させ、60mMで1.5〜3分間保ち溶出し、
(1−ヒドロキシエチリデン)ビス−フォスフォネートとリン酸及びクエン酸を分離することを特徴とする(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。
A dissolution test method for oral preparations comprising (1-hydroxyethylidene) bis-phosphonate or a salt thereof as an active ingredient:
(1) Using a column with an anion exchange resin as a filler,
(2) A sodium hydroxide aqueous solution is used as an eluent,
(3) The flow rate is 0.8 to 1.2 mL / min,
(4) The concentration gradient of the sodium hydroxide aqueous solution is changed from 20 to 44 mmol / L to 60 mmol / L in 4.5 to 7 minutes, and is eluted at 60 mM for 1.5 to 3 minutes,
A method for analyzing (1-hydroxyethylidene) bisphosphonate, comprising separating (1-hydroxyethylidene) bisphosphonate from phosphoric acid and citric acid.
陰イオン交換樹脂が、無孔性樹脂からなるコアの表面がスルホン化され、該コアの表面に4級アルカノールアミンで修飾されたマイクロビーズ(登録商標)が付着したものである請求項8記載の分析方法。   9. The anion exchange resin according to claim 8, wherein the surface of a core made of a nonporous resin is sulfonated and microbeads (registered trademark) modified with a quaternary alkanolamine are attached to the surface of the core. Analysis method. 陰イオン交換樹脂を充填剤とするカラムがイオンパック(登録商標)5Sである請求項8記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。   9. The method for analyzing (1-hydroxyethylidene) bis-phosphonate according to claim 8, wherein the column having an anion exchange resin as a filler is IONPACK (registered trademark) 5S. カラム温度が25〜50℃の範囲である請求項8記載の(1−ヒドロキシエチリデン)ビス−フォスフォネートの分析方法。
The method for analyzing (1-hydroxyethylidene) bisphosphonate according to claim 8, wherein the column temperature is in the range of 25 to 50 ° C.
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