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Chemicals Identification Related To The Chemical Weapons Convention During The 15th Interlabory Proficiency Test Sri Sumartini; Harry Budiman; Nuryatini Nuryatini; Puspa Dewi
Jurnal ILMU DASAR Vol 9 No 1 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.476 KB)

Abstract

Identification of some chemical weapons in the water and organic sample has been carried out during 15th proficiency testing hold by OPCW (Organisation Prohibition of Chemical Weapon). Sample preparation method was adopted from Recommended Operational Procedure (ROP) from OPCW and Helsinki University, Finlandia. Prepared sample was identified by gas chromatography (FID and FPD), gas chromatography mass spectrometry (EI and CI mode) and Liquid chromatography mass spectrometry method.. From 7 spiking chemical weapons introduced to water and organic sample, 3 spiking chemicals could be identified (propylphosphonic acid, isoprophylphosphonic acid and 1,4 Bis 2-chloroethyl (thio) butane). One chemical was reported as Butyl S-2-diisopropylaminoethyl propylphosphonothiolate but obviously this is not a spiking chemical (category false positive identification).
EFEKTIVITAS ESTER SORBITAN UNTUK STABILISASI SARI BUAH Anny Sulaswatti; Siti Isnijah; Hilyati Hilyati; Nuryatini Nuryatini; M Greasia; R Endang; Haryadi Haryadi; Burhanuddin Burhanuddin
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3708.498 KB) | DOI: 10.14203/jkti.v9i1-2.191

Abstract

Sorbitan esters is a nonionic surfactant which can be used as stabilizer or emulsifer i.e for food products. Nonionic surfactant is almost completely provided imported.Fatty acid derived from vegetable oil are potential for producing these esters. Indonesia is one of the largest palm oil producers in the world and sorbitol has already be produced in Indonesia, so that is has oppotnity to develop sorbitan ester. The aim this research is to evaluate the application of P3KT sorbitan esters as stabilizer in fruit juicescomparing with available commerical food stabilize.
PENENTUAN KECEPATAN PENGENDAPAN UNTUK MERANCANG UNIT PENGENDAP NATRIUM BENTONIT Siti Isnijah S.P.; Tasrif Tasrif; Nuryatini Nuryatini
Jurnal Kimia Terapan Indonesia Vol 7, No 1-2 (1997)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4217.88 KB) | DOI: 10.14203/jkti.v7i1-2.223

Abstract

One step of producing paint additive from bentonite is to change Ca-beruonite into Na-bentonite. It applied ion-exchange process by using saturated solution of NaCl. Purification of product was done by washing to remove excess of salt. Nabentonite in production capacity of 40 kg could be separated from water by decantation. Observing the performance of precipitation rate of No-bentonite gave technical data for designing of precipitation unit. The precipitation of Na-bentonite in laboraroty scale was conducted using glass columns with diameter of 2.7 cm; 4.7 cm; 6.2 cm and 11.5 cm respectively. Height of slurry in column was varied in a range of 0.1 m ; 0.2 m ; 0.4 m and 1.0 m. The higher "slurry height" gave a faster precipitation rate. However, in term of separation efficiency determined as percentage of supernatant removed from slurry, higher slurry height resulted lower efficiency. At slurry height of 0.2 m, water removed were 72% (v/v) and 45% (v/v) in 30 minutes for first and second washing processes respectively. By second washing lower volume of supernatant was removed due to the characteristic of Nabentonite that swells during washing process.
PROSES PEMBUATAN SERTA ANALISA BENTON-38 DARI BENTONIT SEBAGAI BAHAN ADITIF PADA CAT Tasrif Tasrif; Nuryatini Nuryatini; Siti Isnijah
Jurnal Kimia Terapan Indonesia Vol 5, No 1 (1995)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3387.126 KB) | DOI: 10.14203/jkti.v5i1.237

Abstract

The production of bentone for paint additive from Cabentonite was carried out by ion exchange process. The process has two steps, i.e. Ca++ ion in Ca-bentonite is exchanged by Na+ ion in saturated solution of NaCl to produce Na-bentonite. Then, Na+ ion in Na-bentonite is exchanged into {(R1)2N(R2)2 + by using alkyl quaternary ammonium salt to produce bentone. lnterms of swelling characteristic the ion exchange using 140 ml of saturated solution of NaCl for 100 g Ca-bentonite produced best product with a swelling characteristic of 15.56. The amount of dimethyl distearyl ammonium salt (DAM) used for production of bentone-38 was 60 g/100 g bentonite. This is based on the ion exchange capacity of bentone-38, i.e. 69 meq for 100 g bentonite. Swelling characteristics of the above bentone-TS-R (reference) and bentone-38-H (experiment) were 24.5 and 39 in Spirit Mineral Terplne (SMT), 55 and 54 in SMT + ethanol (17:3 v/v), and the viscosity of bentone-38-R, and bentone-38-H are 7.2 cps and 6.5 cps respectively.
Co-Authors Anak Agung Istri Sri Wiadnyani Anny Sulaswatti Burhanuddin Burhanuddin Harry Budiman Haryadi Haryadi Hilyati Hilyati M Greasia Puspa Dewi R Endang Siti Isnijah Siti Isnijah S.P. Tasrif Tasrif