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All Journal EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Ani Andriyati
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Mathematics

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PENDUGAAN MODEL RANCANGAN CAMPURAN-CAMPURAN DENGAN PETAK TERBAGI Ani Andriyati
EKOLOGIA Vol 12, No 1 (2012): JURNAL ILMIAH ILMU DASAR DAN LINGKUNGAN HIDUP
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (222.88 KB) | DOI: 10.33751/ekol.v12i1.254

Abstract

Mixture-mixture design with a split plot was proposed for simultaneously two mixture systems. The complete model was formed by multiplying cubic models for two systems. The design was applied to the simultaneous optimizations of both mobile phase chromatographic mixtures and extraction mixture for the Phyllanthus niruri L. In this experiment used split plot approach. Saturated model coefficients were hypothesized with confident interval 99%. Reduction model consisted of real coefficients in complete coefficient models. Estimation method of reduction model coefficients consisted of Ordinary Least Square (OLS) and Generalized Least Square (GLS). Models were formed to count sum peaks chromatographic at 225, 254, and 260 nm. RMSEP values in OLS method at wavelength 225, 254, and 260 nm were produced 4.122, 3.049, and 2.56, otherwise RMSEP values in GLS method were 3.99, 2.79, and 3.18. There are component indicators in wavelength greater and more complex.Key words : Mixture-mixture design, OLS, GLS, split plot
PENDUGAAN MODEL RANCANGAN CAMPURAN-CAMPURAN DENGAN PETAK TERBAGI Ani Andriyati
Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup Vol 12, No 1 (2012): Ekologia : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/ekol.v12i1.254

Abstract

Mixture-mixture design with a split plot was proposed for simultaneously two mixture systems. The complete model was formed by multiplying cubic models for  two systems. The design was applied to the simultaneous optimizations of both mobile phase chromatographic mixtures and extraction mixture for the Phyllanthus niruri L. In this experiment used split plot approach. Saturated model coefficients were hypothesized with confident interval 99%. Reduction model consisted of real coefficients in complete coefficient models. Estimation method of reduction model coefficients consisted of Ordinary Least Square (OLS) and Generalized Least Square (GLS). Models were formed to count sum peaks chromatographic at 225, 254, and 260 nm. RMSEP values in OLS method at wavelength 225, 254, and 260 nm were produced 4.122, 3.049, and 2.56, otherwise RMSEP values in GLS method were 3.99, 2.79, and 3.18. There are component indicators in wavelength greater and more complex. Key words : Mixture-mixture design, OLS, GLS, split plot
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