Validasi Metode Analisis Kadar Kalsium pada Susu Segar secara Titrasi Kompleksometri

Taufik, Moh.; Seveline, Seveline; Saputri, Emilia Ratih

doi:10.22146/agritech.25459

Cited by 6 publications

(8 citation statements)

References 2 publications

(2 reference statements)

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“…As for iodometry, R 2 value got from the relation of titrate volume (y) to standard concentration (x). A good linearity value is R 2 > 0.99 [21], and iodometry give R 2 value 0.9791 (Figure 6b). Meanwhile, based on the linearity test using UV-Vis spectrophotometry, the value of R 2 is 0.9948 (Figure 6a).…”

Section: Linearitymentioning

confidence: 89%

Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography

Dulanlebit

Hattu

Sangadji

et al. 2020

J. Pure App. Chem Res

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Caffeine is a xanthine alkaloid compound found in Robusta sp and Theobroma cacao L. The caffeine extract was obtained by evaporating CHCl3 using a rotary evaporator and determine its content using iodometry, UV-Vis spectrophotometry and High Performance Liquid Chromatography, then validated by measurement methods. The iodometric caffeine content in Theobroma cacao L is 900 mg/kg while UV-Vis spectrophotometry is 4,000 mg/kg, and for HPLC in Robusta sp is 19,475 mg/kg. The iodometry performance gives the linearity value, R2 of 0.9791. The precision values at 5.0 mg/L and 15.0 mg/L are 4.6% and 8.3%. Accuracy for 5.0; 10.0; and 15.0 mg/L are 106%, 100% and 94% respectively. The performance of UV-Vis spectrophotometry gives linearity value, R2 of 0.9948. The precision value at 1.0 mg/L and 6.0 mg/L gives the variance coefficient value of 4.2% and 1.2%, while the accuracy at 1.0 mg/L and 6.0 mg/L are 99% and 101%.

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Section: Linearitymentioning

confidence: 89%

Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography

Dulanlebit

Hattu

Sangadji

et al. 2020

J. Pure App. Chem Res

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“…Tests are carried out to obtain quality information from the sex detection method. Accuracy tests are carried out to obtain data that can be trusted or close to the truth of the performance of a thing or tool [19]. The accuracy of the gold ring pendulum method is fairly high.…”

Section: Discussionmentioning

confidence: 99%

The intensity of the magnetic field on different sex of fetus and accuracy of sex detection using gold ring pendulum

et al. 2023

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Objective: This research aims to measure the intensity of magnetic field of different sex of fetuses and the accuracy of pendulum method for the sex detection of cow fetuses. Methods: Twenty-six Madura cows with gestational age of more than 4 months were used in this research. This research is composed of three steps : 1). Measuring the intensity of the magnetic field on the fetus using an Electromagnetic Field Meter (EMF) type 827 which is affixed to the right side of the abdomen 2). Observe the pattern of the gold ring pendulum used for sex detection of cow fetus 3). Measure the accuracy of the pendulum ring gold method. The data were analyzed using descriptive analysis. Results: The result of this research showed that the intensity of the magnetic field of a male fetus is 0.04 µT for a head, 0.07 µT for back, 0.05 µT for abdomen and 0.03 µT for tail. Magnetic field of a female fetus is 0.03 µT for head, 0.05 µT for back, 0.035 µT for abdomen and 0.01 µT for tail. The gold ring pendulum is a unidirectional pattern for detection male sex showed the accuracy of 91.67% and a rotating pattern for female fetuses showed accuracy of 85.71%. The average accuracy of detection using the gold ring pendulum is 88.46%. Conclusions: The conclusion of this research is male fetuses have a magnetic field higher than male fetus.

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“…Presisi dianalisis menggunakan coefficient of variation, CV (%). Penggunaan EPRK sebagai indikator memiliki presisi yang baik apabila % CV yang diperoleh memenuhi prasyaratan Association of Analytical Communities, AOAC (2012) yaitu maksimal 2% (Taufik et al, 2018)…”

Section: Analisis Data Presisi (Keberulangan/repeatability)unclassified

“…Berdasarkan Tabel 1-4 dan Gambar 5, diketahui pula bahwa pada titrasi sampel spike menggunakan indikator EPRK, PP dan MM diperoleh %CV untuk semua titrasi berada dibawah 0,35%. Data-data ini menunjukan bahwa penggunaan EPRK sebagai indikator titrasi AKBK, AKBL, ALBK dan ALBL memiliki presisi yang baik karena memenuhi syarat presisi yang ditetapkan oleh AOAC (2012) yaitu maksimal 2% (Taufik et al, 2018). Data-data ini menunjukan pula bahwa presisi penggunaan EPRK tidak berbeda dengan presisi penggunaan indikator PP dan MM sebagai indikator titrasi AKBK, AKBL, ALBK dan ALBL.…”

Section: Presisi (Keberulangan) Penggunaan Eprk Sebagai Indikator Tit...unclassified

Aplication of Turmeric Rhizome Pigmen as Acid-Base Titration Indicator

Leba¹,

Kopon²,

Lawung³

et al. 2022

J. Sains Nat.

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Turmeric rhizome is a source of natural yellow pigment which can be applied as a pH indicator. This pigment was extracted from turmeric rhizomes using ethanol as a solvent. The purpose of this study was to examine the application of turmeric rhizome pigment extract (TRPE) as an indicator to determine the concentration of H+, the precision and accuracy of the use of TRPE as an indicator of acid base titration. As a comparison, in this study used also a standard indicator, such as phenolphthalein (PP) and methyl red (MR). Titration was carried out on samples without spike and spike samples. The result showed that the rendement of TRPE was 35.72%. The concentration of H+ on the sample without spikes in the titration of strong acid-strong base (SASB) and strong acid-weak base (SAWB) using TRPE, PP and MR indicators gave the same result, namely 0.041 M. The concentration of H+ on spike samples in SASB and SAWB titrations using TRPE, PP and MM indicators gave the same result, namely 0.165 M. The use of TRPE in the titration of SASB, SAWB, weak acid-strong base (WASB) and weak acid-weak base (WAWB) provided good precision with the coefficient of variation (CV) obtained in the titration of samples without spikes and titrations of spike samples, respectively are 1.2% and 0.35%, but only give good accuracy in SASB and SAWB titration with the recovery in the range of 102.3%-102.7%.Keywords: accuracy; acid base; precision; titration; turmeric ABSTRAKAplikasi Pigmen Rimpang Kunyit Sebagai Indikator Titrasi Asam-BasaRimpang kunyit merupakan salah satu sumber pigmen kuning alami yang dapat diaplikasikan sebagai indikator pH. Pigmen ini diperoleh dengan cara mengekstraksinya dari rimpang kunyit menggunakan pelarut etanol. Penelitian ini bertujuan untuk mengkaji aplikasi ekstrak pigmen rimpang kunyit (EPRK) sebagai indikator untuk menentukan konsentrasi H+ dalam sampel, presisi dan akurasi dari penggunaan EPRK sebagai indikator titrasi asam basa. Sebagai pembanding maka dalam penelitian ini digunakan pula indikator standar yakni fenolftalin (PP) dan metil merah (MM). Titrasi dilakukan terhadap sampel tanpa spike dan sampel spike. Berdasarkan hasil penelitian diperoleh rendemen EPRK sebanyak 35,72%. Konsentrasi H+ dalam sampel tanpa spike pada titrasi asam kuat-basa kuat (AKBK) dan asam kuat-basa lemah (AKBL) menggunakan indikator EPRK, PP dan MM memberikan hasil yang sama yaitu 0,041 M. Konsentrasi H+ dalam sampel spike pada titrasi AKBK dan AKBL menggunakan indikator EPRK, PP dan MM memberikan hasil yang sama yaitu 0,165 M. Penggunaan EPRK dalam titrasi AKBK, AKBL, asam lemah-basa kuat (ALBK) dan asam lemah-basa lemah (ALBL) memberikan presisi yang baik dengan coefficient of variation (CV) yang diperoleh pada titrasi sampel tanpa spike dan titrasi sampel spike berturut-turut adalah ˂ 1,2% dan ˂ 0,35%, tetapi hanya memberikan akurasi yang baik pada titrasi AKBK dan AKBL dengan recovery yang diperoleh adalah pada kisaran 102,3%-102,7%.Kata Kunci: akurasi; asam basa; presisi; titrasi; kunyit

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Validasi Metode Analisis Kadar Kalsium pada Susu Segar secara Titrasi Kompleksometri

Cited by 6 publications

References 2 publications

Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography

Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography

The intensity of the magnetic field on different sex of fetus and accuracy of sex detection using gold ring pendulum

Aplication of Turmeric Rhizome Pigmen as Acid-Base Titration Indicator

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