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All Journal The Journal of Pure and Applied Chemistry Research Journal of Science Innovare EKOLOGIA : Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup International Journal of Research in Community Services
Ade Heri Mulyati
Universitas Pakuan
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Economics, Econometrics & Finance Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Social Sciences Other

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Journal : Journal of Science Innovare

 1 
DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING UV-VIS SPECTROPHOTOMETER Uswatun Hasanah; Ade Heri Mulyati; Sutanto .; Diana Widiastuti; Siti Warnasih; Yulian Syahputri; Tri Panji
Journal of Science Innovare Vol 3, No 2 (2020): Journal of Science Innovare
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v3i2.3007

Abstract

The COD (Chemical Oxygen Demand) analysis method based on the Indonesian National Standard (SNI) is a revision of SNI 06-6989.2-2004, Water and wastewater - Part 2: Method of testing for chemical oxygen demand (COD) with closed reflux spectrophotometrically. This SNI uses references from international standard methods, namely Standard Methods for the Examination of Water and Wastewater, 21st Edition, editor of LS Clesceri, AE Greenberg, AD Eaton, APHA, AWWA and WEF, Washington DC, 2005, Methods 5220 D (Closed Reflux, Colorimetric Methods). The purpose of this study was to validate the total method for testing chemical oxygen demand (COD) in water and wastewater with the reduction of Cr2O7 2- spectrophotometrically in the range of COD values of 100 mg / L to 900 mg / L measurements were made at a wavelength of 600 nm. and COD values less than or equal to 90 mg / L measurements were made at a wavelength of 420 nm. The results showed that the method SNI 06-6898.2- 2009  has good validation results including the r results obtained from the calibration curve equation of 0.998, a precision of 1.82%, an accuracy of 98.25% and LOD and LOQ of 12.27 mg / L and 25, 61 mg / L.
CHARACTERISTICS OF DURIAN SEED BROWNIES WHICH ENRICHED WITH COCONUT FLOUR Ade Heri Mulyati; Diana Widyiastuti; Ikhwanul Muslimin
Journal of Science Innovare Vol 2, No 01 (2019): Journal of Science Innovare, February 2019
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (256.003 KB) | DOI: 10.33751/jsi.v2i01.1522

Abstract

Durian seed flour is a product selected and used as a fixed variable in future studies. The results of chemical analysis and micro Brownies F2 have a water content of 26.47%, ash 1.63%, 16.56% fat, 6.91% protein, carbohydrates 48.43%,% dietary fiber, 4 ALT tests, 3 x 102 cabbage / g, e- coli 3, mold 10 Bacillus Cereus 100. In a subsequent study, Brownies steamed (F8) with a ratio of 75% wheat flour and seed flour 25% enriched 20% Durian pulp has the water content of 26.35%, ash 1.65%, 19.58% fat, 7.20% protein, carbohydrates 48.53 %, 12.53% dietary fiber, 2.7 x 102 ALT test cabbage / g, e-coli 3, mold 10 Bacillus Cereus 100. The shelf life of the conventional product at room temperature (28-30oC), Brownies control F1 has the shelf life of 3 days while the Brownies F8 is 6 days, the engine coolant (2- 8oc) Brownies control F1 has the shelf life of 10 days while Brownies F8 14 days.
DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING SPECTRODIRECT Ade Heri Mulyati; Leny Heliawati; Sutanto .; Uswatun Hasanah; Diana Widiastuti; Siti Warnasih; Yulian Syahputri
Journal of Science Innovare Vol 3, No 2 (2020): Journal of Science Innovare
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v3i2.3006

Abstract

Increased human activities will cause various problems, one of which is water pollution in water sources because it receives a pollution load that exceeds its carrying capacity. In the context of environmental conservation, the government has set quality standards for liquid waste produced by various industries and other activities in a Decree of the State Minister for the Environment. COD (Chemical Oxygen Demand) is one of the most important parameters in wastewater quality standards. This study aims to validate the COD analysis method which refers to COD Thermoreactor System (LOVIBOND brand) at Pakuan University Service Laboratory, to ensure the validity of COD analysis results at Pakuan University Service Laboratory. Spectrodirect COD analysis method provides results that meet the requirements of accuracy, precision, LOD, and LOQ which is quite good. The results of the Coefficient of Variation give good results with a value of 1.8841% indicating the accuracy of the analysis method is good. The accuracy parameter also gives good results and meets the requirements with a% recovery value of 98.70351%. Overall, it can be stated that the spectrodirect analysis method tested is an accurate, precise, simple, and economical method for determining COD levels
CHARACTERISTICS OF DURIAN SEED BROWNIES WHICH ENRICHED WITH COCONUT FLOUR Ade Heri Mulyati; Diana Widyiastuti; Ikhwanul Muslimin
Journal of Science Innovare Vol 2, No 1 (2019): Journal of Science Innovare, Volume 02 Number 01 2019
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v2i01.1522

Abstract

Durian seed flour is a product selected and used as a fixed variable in future studies. The results of chemical analysis and micro Brownies F2 have a water content of 26.47%, ash 1.63%, 16.56% fat, 6.91% protein, carbohydrates 48.43%,% dietary fiber, 4 ALT tests, 3 x 102 cabbage / g, e- coli 3, mold 10 Bacillus Cereus 100. In a subsequent study, Brownies steamed (F8) with a ratio of 75% wheat flour and seed flour 25% enriched 20% Durian pulp has the water content of 26.35%, ash 1.65%, 19.58% fat, 7.20% protein, carbohydrates 48.53 %, 12.53% dietary fiber, 2.7 x 102 ALT test cabbage / g, e-coli 3, mold 10 Bacillus Cereus 100. The shelf life of the conventional product at room temperature (28-30oC), Brownies control F1 has the shelf life of 3 days while the Brownies F8 is 6 days, the engine coolant (2- 8oc) Brownies control F1 has the shelf life of 10 days while Brownies F8 14 days.
DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING SPECTRODIRECT Ade Heri Mulyati; Leny Heliawati; Sutanto .; Uswatun Hasanah; Diana Widiastuti; Siti Warnasih; Yulian Syahputri
Journal of Science Innovare Vol 3, No 2 (2020): Journal of Science Innovare, Volume 03 Number 02 2020
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v3i2.3006

Abstract

Increased human activities will cause various problems, one of which is water pollution in water sources because it receives a pollution load that exceeds its carrying capacity. In the context of environmental conservation, the government has set quality standards for liquid waste produced by various industries and other activities in a Decree of the State Minister for the Environment. COD (Chemical Oxygen Demand) is one of the most important parameters in wastewater quality standards. This study aims to validate the COD analysis method which refers to COD Thermoreactor System (LOVIBOND brand) at Pakuan University Service Laboratory, to ensure the validity of COD analysis results at Pakuan University Service Laboratory. Spectrodirect COD analysis method provides results that meet the requirements of accuracy, precision, LOD, and LOQ which is quite good. The results of the Coefficient of Variation give good results with a value of 1.8841% indicating the accuracy of the analysis method is good. The accuracy parameter also gives good results and meets the requirements with a% recovery value of 98.70351%. Overall, it can be stated that the spectrodirect analysis method tested is an accurate, precise, simple, and economical method for determining COD levels
DEVELOPMENT OF COD (CHEMICAL OXYGEN DEMAND) ANALYSIS METHOD IN WASTE WATER USING UV-VIS SPECTROPHOTOMETER Uswatun Hasanah; Ade Heri Mulyati; Sutanto .; Diana Widiastuti; Siti Warnasih; Yulian Syahputri; Tri Panji
Journal of Science Innovare Vol 3, No 2 (2020): Journal of Science Innovare, Volume 03 Number 02 2020
Publisher : Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33751/jsi.v3i2.3007

Abstract

The COD (Chemical Oxygen Demand) analysis method based on the Indonesian National Standard (SNI) is a revision of SNI 06-6989.2-2004, Water and wastewater - Part 2: Method of testing for chemical oxygen demand (COD) with closed reflux spectrophotometrically. This SNI uses references from international standard methods, namely Standard Methods for the Examination of Water and Wastewater, 21st Edition, editor of LS Clesceri, AE Greenberg, AD Eaton, APHA, AWWA and WEF, Washington DC, 2005, Methods 5220 D (Closed Reflux, Colorimetric Methods). The purpose of this study was to validate the total method for testing chemical oxygen demand (COD) in water and wastewater with the reduction of Cr2O7 2- spectrophotometrically in the range of COD values of 100 mg / L to 900 mg / L measurements were made at a wavelength of 600 nm. and COD values less than or equal to 90 mg / L measurements were made at a wavelength of 420 nm. The results showed that the method SNI 06-6898.2- 2009  has good validation results including the r results obtained from the calibration curve equation of 0.998, a precision of 1.82%, an accuracy of 98.25% and LOD and LOQ of 12.27 mg / L and 25, 61 mg / L.
Co-Authors Antony Rendi Sanjaya Diana Widiastuti Diana Widyiastuti Ikhwanul Muslimin LAKSMI AMBARSARI Leny Heliawati Padmono Citroreksoko Purwantiningsih Sugita Siti Warnasih Sutanto . Tri Panji Uswatun Hasanah Yulian Syahputri Zuniar Subastian