JP6476223B2 - 医薬品の製造工程の工程分析方法 - Google Patents
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Description
表1に示す4種の球形結晶セルロース(セルフィア:旭化成ケミカルズ社製)を核粒子として用い、その上に第1のコーティング、さらにその上へ第2のコーティングを施した。第1のコーティング工程と第2のコーティング工程のそれぞれにおいて蛍光X線を測定し、コーティング状態を評価した。
実施例1で得られたコーティング粒子の上に、さらにマスクコーティングを施した。
実施例3および実施例4では、実施例1および実施例2の核粒子として使用した球形結晶セルロースのような球形度のよいものではなく、結晶乳糖水和物(80M)の微粉を除いたものを核粒子として使用した。この核粒子はDMV社の乳糖水和物の粒度の大きなもの(80メッシュグレード)であるが、米粒のような形をしている。粒度はレーザー式粒度測定機(LA−910およびLA−950:堀場製作所製)で測定した。平均粒径(D50%)は約200μmであった。
実施例3で15kgのスプレー液をコーティングした顆粒の上にタルク主体の処方液をマスクコーティングした。表8に実施例4のマスクコーティングの処方を支援す。スケールは中スケール(約29kg)であった。スプレー液濃度は固形分19%とした。
実施例4のマスクコーティング工程における蛍光X線測定に用いたサンプルについて、モデル薬物である炭酸カルシウムを近赤外分光法(NIR)で測定した。得られた近赤外スペクトルはブロードな吸収を示した。通常、炭酸カルシウムの近赤外における吸収が弱くブロードなので、そのスペクトルを解釈するにはケモメトリックス等の処理を施す必要がある。実施例4の検査対象粒子群に含まれる炭酸カルシウムの含有量は、マスクコーティングの初期であっても数%であるので、十分にNIRで検出できる濃度ではなかった。
Claims (13)
- 核粒子上にコーティング層が形成された被検査粒子群の蛍光X線を測定する蛍光X線測定工程と、
前記蛍光X線測定工程において測定された蛍光X線に基づいて前記被検査粒子群のコーティング状態を評価する評価工程とを含み、
少なくとも前記核粒子と前記コーティング層のいずれか一方は、蛍光X線を発する元素を含有する薬物および/または添加物を含む、医薬品製造工程の工程分析方法。 - 前記蛍光X線測定工程は、少なくとも、第1のコーティング時間または第1のコーティング量と、第2のコーティング時間またはコーティング量とにおいて行われる、請求項1に記載の工程分析方法。
- 核粒子上にコーティング層を形成するコーティング工程を含み、
前記蛍光X線測定工程は、前記コーティング工程の間に複数回行われる、請求項1または請求項2に記載の工程分析方法。 - 前記蛍光X線測定工程は、前記コーティング工程の間に連続して行われる、請求項3に記載の工程分析方法。
- 前記評価工程における評価に基づいて前記コーティング工程におけるコーティング層の形成を制御する、請求項3または請求項4に記載の工程分析方法。
- 前記評価工程における評価はコーティング量の評価である、請求項1から請求項5までのいずれか1項に記載の工程分析方法。
- 前記コーティング層は、蛍光X線を発する元素を含有する薬物および/または添加物を含む、請求項1から請求項6までのいずれか1項に記載の工程分析方法。
- 前記コーティング層は少なくとも第1の層と第2の層とを含み、
前記第1の層は蛍光X線を発する第1の元素を含有する薬物および/または添加物を含み、
前記第2の層は蛍光X線を発する第2の元素を含有する薬物および/または添加物を含み、
前記第1の元素と前記第2の元素は互いに異なる、請求項1から請求項7までのいずれか1項に記載の工程分析方法。 - 前記コーティング層は、蛍光X線を実質的に発しない、または、弱い蛍光X線を発する軽元素で構成されている、請求項1から請求項6までのいずれか1項に記載の工程分析方法。
- 前記核粒子は、蛍光X線を発する元素を含有する薬物および/または添加物を含む、請求項1から請求項8までのいずれか1項に記載の工程分析方法。
- 前記核粒子は、蛍光X線を実質的に発しない、または、弱い蛍光X線を発する軽元素で構成されている、請求項1から請求項8までのいずれか1項に記載の工程分析方法。
- 前記蛍光X線を発する元素は原子番号が11以上の元素である、請求項1から請求項11までのいずれか1項に記載の工程分析方法。
- 前記蛍光X線を実質的に発しない、または、弱い蛍光X線を発する軽元素は原子番号が10以下の元素である、請求項9または請求項11に記載の工程分析方法。
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