Paid
SERVICE DESCRIPTION | "Antioxidant DPPH method (Quecetin comparison). Method: modification of the method Yen, G.C., and Chen, H.Y., “Antioxidant activity of various tea extracts in relation to heir antimutagenicity," J Agric Food Chem 43: 27-32,1995. IMPORTANT:…
- Laboratorium Cara Pembuatan Obat Tradisional yang Baik (CPOTB)
- KST Serpong (Bacharuddin Jusuf Habibie)
Laboratorium Cara Pembuatan Obat Tradisional yang Baik (CPOTB) Gedung 450 Kawasan Sains dan Teknologi BJ. Habibie (PUSPIPTEK) Serpong, 15314, Tangerang Selatan, Banten – Indonesia - 08119811565
- labcpotb@brin.go.id
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"Antioxidant DPPH method (Quecetin comparison). Method: modification of the method Yen, G.C., and Chen, H.Y., “Antioxidant activity of various tea extracts in relation to heir antimutagenicity," J Agric Food Chem 43: 27-32,1995.
IMPORTANT:
The minimum weight of each sample is between 10 - 20 mg (more if possible)
Please send samples that are the result of extraction, not in simplified form
Test/Tariff per spl: Anti-oxidant Rp. 500,000 (FLAT RATE)
Sample Requirements Sample weight: between 10 - 20 mg (minimum, if more, the better).
Quercetin Comparator (not replaceable)
Test principle: DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) is a radical which when dissolved in methanol solvent will have a violet color with an absorption at a wavelength (λ) of 515 nm. Antioxidant testing is based on electron transfer from the analyte (sample containing antioxidants) to DPPH which causes a decrease in the intensity of the violet color of DPPH. The more active the sample, the fainter the violet color will be. The antioxidant activity of the sample was calculated based on the difference in absorbance of the blank solution (only DPPH) and the sample solution + DPPH.
The use of the DPPH assay provides an easy and fast way to evaluate antioxidants by spectrophotometry and can therefore be useful for assessing multiple products at one time."
Application Requirements:
IMPORTANT:
The minimum weight of each sample is between 10 - 20 mg (more if possible)
Please send samples that are the result of extraction, not in simplified form
Test/Tariff per spl: Anti-oxidant Rp. 500,000 (FLAT RATE)
Sample Requirements Sample weight: between 10 - 20 mg (minimum, if more, the better).
Quercetin Comparator (not replaceable)
Test principle: DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) is a radical which when dissolved in methanol solvent will have a violet color with an absorption at a wavelength (λ) of 515 nm. Antioxidant testing is based on electron transfer from the analyte (sample containing antioxidants) to DPPH which causes a decrease in the intensity of the violet color of DPPH. The more active the sample, the fainter the violet color will be. The antioxidant activity of the sample was calculated based on the difference in absorbance of the blank solution (only DPPH) and the sample solution + DPPH.
The use of the DPPH assay provides an easy and fast way to evaluate antioxidants by spectrophotometry and can therefore be useful for assessing multiple products at one time."
Application Requirements:
- Photo
- Other Supporting File
| File Name | File Size | |
|---|---|---|
| Service SOP file | 1.12 MB | |
| Template Photo | 0 MB | |
| Template Other Supporting File | 0 MB |
