•Method validation 1) Linearity Linearity was determined over the rang translation - •Method validation 1) Linearity Linearity was determined over the rang Indonesian how to say

•Method validation 1) Linearity Lin

•Method validation
1) Linearity
Linearity was determined over the range of 10–50 μg/ml for Salbutamol Sulphate. Accurately measured Stock solution B of Salbutamol Sulphate (1, 2, 3, 4, and 5 ml) was transferred to one set of a series of 10 ml volumetric flasks. To each appropriately labeled flask 0.8 ml of 2N FCR solution and 6 ml of distilled water was added. The volumetric flasks were shaken well for at least 5 min followed by addition of 1.5 ml of 1N NaOH solution. The volume was made up to the mark and stored for 15 min in the dark. A spectrum was recorded by placing drug solutions and diluent in sample and reference cells respectively. The absorbance was measured at 723 nm (Peak maxima) and was plotted vs. concentration to give calibration curve, and regression equation and correlation coefficient was calculated and presented in table 2 and fig. 3. The calibration curve of amplitude of absorbance against concentration of the drug showed linearity.
2) Sensitivity
The sensitivity of the proposed method for measurement of Salbutamol Sulphate was estimated in terms of limit of detection [LOD] and limit of quantification [LOQ]. The LOD and LOQ were calculated by using the slope and SD of response. The mean slope value and SD of response were obtained after plotting six calibration curves. The LOD and LOQ obtained are reported in table 2.
3) Precision
The precision of the method was established by system precision and method precision. System Precision was subjected to intraday and inter-day variation studies.
a) System Precision

Intraday precision was determined by using three different levels of drug concentrations (10, 20, 30 μg/ml) prepared from Stock solution B and each level was analyzed three times in a day. Same procedure was followed for three different days to study the Inter-day precision. Data obtained are given in the table 2.
b) Method Precision

Method precision was determined by using sample solution of drug concentrations (10, 20, 30, 40 and 50μg/ml) and it was analyzed six times in a day by the same analyst. Data obtained are given in the table 2.
4) Accuracy
Recovery studies by the standard addition method were performed to study the accuracy of the proposed method. Preanalysed samples of Salbutamol Sulphate (10 μg/ml) were spiked with 80, 100 and 120 % extra Salbutamol Sulphate standard and the mixture were analyzed with the proposed method. Accuracy was assessed as the % Recovery at each concentration level. Data obtained from accuracy study are given in table 2.
5) Ruggedness
To establish ruggedness of the proposed method, assays for two different concentrations of Salbutamol Sulphate tablets were performed by two different analysts. The results of assays are represented as % Recovery with SD and % RSD showing the ruggedness of the proposed method are illustrated in table 2.
6) Robustness
The absorbance readings of 10μg/ml were measured at different laboratory using different spectrophotometer by another analyst and the % RSD values obtained to verify their robustness. Data obtained are given in the table 2.
7) Specificity
Refers to the extent to which the method can be used to determine particular analytes in mixtures or matrices without interferences from other components of similar behavior. The data obtained are given in the table 3.
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•Method validation 1) Linearity Linearity was determined over the range of 10–50 μg/ml for Salbutamol Sulphate. Accurately measured Stock solution B of Salbutamol Sulphate (1, 2, 3, 4, and 5 ml) was transferred to one set of a series of 10 ml volumetric flasks. To each appropriately labeled flask 0.8 ml of 2N FCR solution and 6 ml of distilled water was added. The volumetric flasks were shaken well for at least 5 min followed by addition of 1.5 ml of 1N NaOH solution. The volume was made up to the mark and stored for 15 min in the dark. A spectrum was recorded by placing drug solutions and diluent in sample and reference cells respectively. The absorbance was measured at 723 nm (Peak maxima) and was plotted vs. concentration to give calibration curve, and regression equation and correlation coefficient was calculated and presented in table 2 and fig. 3. The calibration curve of amplitude of absorbance against concentration of the drug showed linearity. 2) Sensitivity The sensitivity of the proposed method for measurement of Salbutamol Sulphate was estimated in terms of limit of detection [LOD] and limit of quantification [LOQ]. The LOD and LOQ were calculated by using the slope and SD of response. The mean slope value and SD of response were obtained after plotting six calibration curves. The LOD and LOQ obtained are reported in table 2. 3) Precision The precision of the method was established by system precision and method precision. System Precision was subjected to intraday and inter-day variation studies. a) System Precision Intraday precision was determined by using three different levels of drug concentrations (10, 20, 30 μg/ml) prepared from Stock solution B and each level was analyzed three times in a day. Same procedure was followed for three different days to study the Inter-day precision. Data obtained are given in the table 2. b) Method Precision Method precision was determined by using sample solution of drug concentrations (10, 20, 30, 40 and 50μg/ml) and it was analyzed six times in a day by the same analyst. Data obtained are given in the table 2. 4) Accuracy Recovery studies by the standard addition method were performed to study the accuracy of the proposed method. Preanalysed samples of Salbutamol Sulphate (10 μg/ml) were spiked with 80, 100 and 120 % extra Salbutamol Sulphate standard and the mixture were analyzed with the proposed method. Accuracy was assessed as the % Recovery at each concentration level. Data obtained from accuracy study are given in table 2. 5) Ruggedness To establish ruggedness of the proposed method, assays for two different concentrations of Salbutamol Sulphate tablets were performed by two different analysts. The results of assays are represented as % Recovery with SD and % RSD showing the ruggedness of the proposed method are illustrated in table 2. 6) Robustness The absorbance readings of 10μg/ml were measured at different laboratory using different spectrophotometer by another analyst and the % RSD values obtained to verify their robustness. Data obtained are given in the table 2. 7) Specificity Refers to the extent to which the method can be used to determine particular analytes in mixtures or matrices without interferences from other components of similar behavior. The data obtained are given in the table 3.
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• Metode validasi
1) Linearitas
Linearitas ditentukan selama rentang 10-50 ug / ml untuk Salbutamol sulfat. Diukur secara akurat solusi Stock B dari Salbutamol sulfat (1, 2, 3, 4, dan 5 ml) dipindahkan ke satu set rangkaian 10 ml labu volumetrik. Untuk masing-masing labu tepat berlabel 0,8 ml larutan 2N FCR dan 6 ml air suling ditambahkan. Termos volumetrik terguncang dengan baik selama sedikitnya 5 menit diikuti dengan penambahan 1,5 ml larutan 1N NaOH. Volume dibuat sampai tanda dan disimpan selama 15 menit dalam gelap. Sebuah spektrum tercatat dengan menempatkan solusi obat dan pengencer dalam sampel dan referensi sel masing-masing. Absorbansi diukur pada 723 nm (Puncak maxima) dan diplot vs konsentrasi untuk memberikan kurva kalibrasi, dan persamaan regresi dan koefisien korelasi dihitung dan disajikan pada tabel 2 dan Ara. 3. Kurva kalibrasi amplitudo absorbansi terhadap konsentrasi obat menunjukkan linearitas.
2) Sensitivitas
Sensitivitas metode yang diusulkan untuk pengukuran Salbutamol sulfat diperkirakan dalam hal batas deteksi [LOD] dan batas kuantifikasi [LOQ]. LOD dan LOQ dihitung dengan menggunakan kemiringan dan SD respon. Mean nilai kemiringan dan SD respon diperoleh setelah merencanakan enam kurva kalibrasi. LOD dan LOQ diperoleh dilaporkan pada tabel 2.
3) Presisi
Ketepatan metode didirikan oleh presisi sistem dan metode presisi. Sistem Presisi menjadi sasaran studi intraday dan variasi antar-hari.
A) sistem presisi

Intraday presisi ditentukan dengan menggunakan tiga tingkat yang berbeda dari konsentrasi obat (10, 20, 30 ug / ml) dibuat dari solusi Stock B dan setiap tingkat dianalisis tiga kali dalam sehari. Prosedur yang sama diikuti selama tiga hari yang berbeda untuk mempelajari presisi Inter-hari. Data yang diperoleh diberikan dalam tabel 2.
b) Metode Presisi

Metode presisi ditentukan dengan menggunakan larutan sampel konsentrasi obat (10, 20, 30, 40 dan 50μg / ml) dan dianalisis enam kali dalam sehari oleh analis yang sama . Data yang diperoleh diberikan dalam tabel 2.
4) Akurasi
studi Recovery dengan metode penambahan standar dilakukan untuk mempelajari ketepatan metode yang diusulkan. Sampel Preanalysed dari Salbutamol sulfat (10 mg / ml) dibubuhi dengan 80, 100 dan 120% ekstra Salbutamol sulfat standar dan campuran dianalisis dengan metode yang diusulkan. Akurasi dinilai sebagai Pemulihan% pada setiap tingkat konsentrasi. Data yang diperoleh dari studi akurasi diberikan dalam tabel 2.
5) ketidakrataan
Untuk membangun kekasaran dari metode yang diusulkan, tes untuk dua konsentrasi yang berbeda dari tablet Salbutamol sulfat dilakukan oleh dua analis yang berbeda. Hasil tes yang direpresentasikan sebagai% Pemulihan dengan SD dan% RSD menunjukkan kekasaran dari metode yang diusulkan diilustrasikan pada tabel 2.
6) Kekokohan
Pembacaan absorbansi dari 10μg / ml diukur pada laboratorium yang berbeda menggunakan spektrofotometer yang berbeda dengan analis lain dan % nilai RSD diperoleh untuk memverifikasi ketahanan mereka. Data yang diperoleh diberikan dalam tabel 2.
7) Spesifisitas
Mengacu pada sejauh mana metode yang dapat digunakan untuk menentukan analit tertentu dalam campuran atau matriks tanpa gangguan dari komponen lain dari perilaku serupa. Data yang diperoleh diberikan dalam tabel 3.
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