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Anton Yuntarso
Universitas Maarif Hasyim Latif
Biochemistry, Genetics & Molecular Biology Chemistry Immunology & microbiology Medicine & Pharmacology

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PEMBUATAN DAN KARAKTERISASI ELEKTRODA SELEKTIF ION Pb2+ JENIS KAWAT PERAK TERLAPIS DENGAN IONOFOR 1,10-DIBENZYL-1,10-DIAZA-18-CROWN-6 Anton Yuntarso; Muji Harsini; Dheasy Herawati; Khoirul Ngibad
Jurnal SainHealth Vol 2, No 1 (2018): Maret 2018
Publisher : Faculty of Health Sciences Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jsh.v2i1.173.21-30

Abstract

Lead concentration greater than 10 µg/L make health problem among other thing decrease in intelligence, nervous system disorders, so lead rapid analysis with high accuracy and precision is needed. The aim of this research are to know the composition of ESI-Pb2+ membrane silver wire coated type PVC/1,10-dibenzyl-1,10-diaza-18-crown-6, optimum pH condition and to study the characteristic electrode, such as Factor Nernst, range measurement, limit detection, accuracy and precision, selectivity, and blood serum sample accuracy. The result has shown that potensial measurement with Ag/AgCl reference electrode give the best membrane composition of 45 mg PVC, 90 mg NPOE, 10 mg KTCPB, 5 mg 1,10-dibenzyl-1,10-diaza-18-crown-6 in 0,5 ml THF solution. The optimum pH is 3-7 and gave 29,64 mV as Factor Nernst with range measurement 10-1–10-6 M, limit detection was noted at 1,28.10-6 M, and accuracy is 73% - 157% in 10-6–10-1 M Pb2+ solution with variation coefficient 0,70–1,2. The selectivity constanta is K_(i,j)^Pot < 1 toward K+, Ca2+, Mg2+, Na+, Cu2+ dan Fe3+ as interfering ions. Recovery percentage of Ion Selective Electrode Pb2+ silver wire coated type with PVC /1,10-dibenzyl-1,10-diaza-18-crown-6 to blood serum sample has shown 95% - 143% and 110%-117% compare with AAS.
PENENTUAN DOSIS KAPORIT SEBAGAI DESINFEKTAN DALAM MENYISIHKAN KONSENTRASI AMMONIUM PADA AIR KOLAM RENANG Dheasy Herawati; Anton Yuntarso
Jurnal SainHealth Vol 1, No 2 (2017): September 2017
Publisher : Faculty of Health Sciences Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jsh.v1i2.106.66-74

Abstract

Disinfectant commonly used in water swimming pools is calcium hypochlorite {Ca(OCl) 2 }. Calcium hypochlorite is disinfectant which is used in the cleaning of water due to a searchable, inexpensive and contain approximately 70% chlorine. The use of calcium hypochlorite with improper doses will cause the formation of trihalomethane (THMs) compounds which are toxic and carcinogenic nature so that the use of calcium hypochlorite should be based on the calculation of Break Point Clorination (BPC) in order to secure for the environment. The purpose of the research was determine the opyimum dose of calcium hypochlorite in the form of crystal and solution for removal concentration of ammonium. The results obtained from the research that the optimum dose in the water swimming pools for disinfection process is not more than 10 g/L. The addition of calcium hypochlorite in the form of crystals can be removal the concentration of ammonium of 87.50% and in the form of aqueous solution of 83.30%. so it can be deduced that the addition of calcium hypochlorite in the form of crystals better than as a solution to removal the concentration of ammonium.
PERBANDINGAN METODE STANDAR NASIONAL INDONESIA DAN NON STANDAR NASIONAL INDONESIA DALAM PENENTUAN KADAR KARBOHIDRAT TOTAL Nurfadilah Nurfadilah; Anton Yuntarso; Dheasy Herawati
Jurnal SainHealth Vol 3, No 2 (2019): September 2019
Publisher : Faculty of Health Sciences Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jsh.v3i2.601.37-41

Abstract

Carbohydrates are a source of energy needed by the body because carbohydrates are an important food component. According to SNI (Standar Nasional Indonesia), carbohydrate content in food must not be less than 60%. In this study, researchers wanted to compare the method of determining carbohydrate content according to SNI and according to AOAC (Non-SNI), both methods used Luff Schoorl, in the SNI method there was an addition of CH3COOH, whereas the Non-SNI method did not add CH3COOH. In this study a sample of a mixture of glucose, sucrose and NaCl was used. From the research results obtained indicate that there is a difference between the SNI method and Non-SNI method, where the Non-SNI method is better used at a 10% sample concentration with 250X dilution and 20% sample concentration at 500x dilution, whereas on the SNI method is better used at 30% sample concentration with 500X dilution, and the accuracy value obtained is 94.14% to 97.23%.
Co-Authors Dheasy Herawati Khoirul Ngibad Muji Harsini Nurfadilah Nurfadilah