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To develop an inductively coupled plasma mass spectrometry (ICP-MS) matrix matching method for determination of migration of 11 elements in ketorolac tromethamine injection, including Al, As, B, Ca, Cd, Fe, Mn, Pb, Sb, Si, Ti.
Samples were diluted and capacitated with 1% nitric acid after precipitation with nitric acid. 2% ethanol was added into the standard solution as the matrix. The matrix effect was eliminated by the matrix matching method, and the polyatomic ion interferences were eliminated by the hydrogen collision reaction mode and the helium collision mode.
The linearity of 11 elements was good (r≥0.997 0). The limits of detection were 0. 049-133 ng·mL-1. The average recoveries of all 11 elements were in the range of 83.8%-107.1%, and the RSD of repeatability was 2.6%-11.0%. Three batches of ketorolac tromethamine injection under acceleration were tested. The overall safety risk was low.
The established matrix matching ICP-MS method is simple, rapid and accurate. It can effectively eliminate the matrix effect and be used for the determination of eleven elemental impurities in ketorolac tromethamine injection, providing technical reference for risk assessment of drug packaging material compatibility.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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