Intra- and inter-day的解釋?

關於期刊中 The coefficient of variation for intra- and inter-day assays is ,7.5%. 此句的翻訪解釋~ 目前是翻譯成 Intra- and inter-day的變異系數<7.5% 但「Intra- and inter-day」要怎麼解釋呢? 之前問過老師但還不是很懂此句的意思 麻煩了 選自↓期刊中 摘要中的句子 Curcumin in plasma and urine: quantitation by high-performance liquid chromatography 摘要全文 Curcumin,... 顯示更多 關於期刊中
The coefficient of variation for intra- and inter-day assays is ,7.5%.
此句的翻訪解釋~

目前是翻譯成
Intra- and inter-day的變異系數<7.5%

但「Intra- and inter-day」要怎麼解釋呢?
之前問過老師但還不是很懂此句的意思

麻煩了

選自↓期刊中 摘要中的句子
Curcumin in plasma and urine: quantitation by high-performance liquid chromatography

摘要全文
Curcumin, a derivative of the plant Curcuma longa, is used extensively in the food industry. It is a major component of curry powder, and research has shown that curcumin may prevent cancer and other chronic diseases. We have developed a robust automated analytical method for the determination of curcumin in plasma and urine. The method involves extracting the curcumin from 0.2 ml sample volume with ethyl acetate /methanol organic solvents, and use of an internal standard, b-17-estradiol acetate. Analysis utilizes a reversed-phase C column and UV detection at 262 nm. Performance 18 characteristics have been assessed. The assay is linear from 0.2 to 7.0 mg/ ml.
The coefficient of variation for intra- and inter-day assays is <7.5%.
The average recovery of curcumin from plasma and urine is greater than 96%. The data presented in this report demonstrate that the method provides rapid, sensitive, precise and accurate measurements of curcumin concentrations in plasma and urine.
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