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Nuryatini Nuryatini

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Author-ID : 3235872

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Social Sciences Other

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Articles

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)

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

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

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

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.

Analisis senjata kimia melalui uji profisiensi organisation prohibition of chemical weapon (OPCW) Evita Boes; Dyah Styarini; Nuryatini Nuryatini; Harry Budiman
JURNAL STANDARDISASI Vol 11, No 1 (2009): Vol. 11(1) 2009
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v11i1.12

Identification of some chemicals weapons in the water and organic sample has been carried out during 21th proficiency testing conducted by OPCW (Organisation Prohibition of Chemical Weapon). The samples were prepared and analysed in accordance with the principles describe in the work instructions for the preparation of test samples for OPCW proficiency test. The extract of samples were analysed and identified by GC-EI-MS, GCCI-MS, GC-FPD, GC-NPD and LC-MS. From 7 spiking chemical weapons introduced to water and organic sample, 3 spiking chemicals could be identified such as Bis(2,4,4 trimethylpentyl)methylphosphonate, 2-(N-Ethyl-N-isoprophylamino)etanol and Bis(2-diisoprophylaminoethyl)disulfide.

PENENTUAN NILAI SERTIFIKAT BAHAN ACUAN LARUTAN BUFER BORAKS UNTUK PENGUKURAN DERAJAT KEASAMAN (pH) Nuryatini Nuryatini; Sujarwo Sujarwo; Ayu Hindayani
JURNAL STANDARDISASI Vol 18, No 1 (2016)
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v18i1.695

Dalam rangka pengembangan beberapa bahan acuan yang penting di Indonesia, Pusat Penelitian Kimia-LIPI telah membuat bahan acuan larutan bufer boraks yang siap untuk disertifkasi untuk pengukuran pH basa yang tertelusur ke standar bufer primer dari NIST. Bahan acuan tersertifikasi digunakan untuk memberikan ketertelusuran dan keandalan dari suatu hasil pengukuran kimia. Pada saat ini, bahan acuan tersertifikasi yang digunakan untuk pengukuran pH merupakan barang impor dengan harga yang cukup mahal. Apabila bahan acuan tersebut dapat dibuat di Indonesia, harga akan menjadi lebih murah dan bahan acuan mudah didapatkan. Larutan standar bufer boraks telah dibuat dari natrium tetraborat dekahidrat yang dilarutkan di dalam air demineral dengan konsentrasi 0,01 mol/kg. Nilai pH untuk sertifikat telah diukur dengan menggunakan pH meter yang mempunyai sensitivitas tinggi dengan teknik pengukuran dua titik kalibrasi. Uji Karakterisasi, uji homogenitas, dan uji stabilitas dari bahan acuan yang akan berkontribusi dalam penentuan nilai dan ketidakpastiannya telah dilakukan. Hasil pengukurn memberikan nilai pH 9,18 pada suhu 25 °C dengan nilai ketidakpastian diperluas 0,03 pada tingkat kepercayaan 95% dan faktor pencakupan, k = 2,0. Bahan acuan ini memberikan data yang stabil selama 2 (dua) tahun dan diharapkan dapat menggantikan bahan acuan larutan bufer standar tersertifikat yang masih merupakan barang impor.

PENERAPAN PROSEDUR SNI DALAM UJI BANDING LABORATORIUM Analisa Kadar Proksimat dalam Powdered Tonic Food Drink Oman Zuas; Nuryatini Nuryatini; Dyah Styarini
JURNAL STANDARDISASI Vol 11, No 2 (2009): Vol. 11(2) 2009
Publisher : Badan Standardisasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31153/js.v11i2.647

The primary objective of proficiency testing (PT) is in the provision of information and support to participatinglaboratories, to enable them to monitor and improve the quality of their measurements. However, other benefitscan be obtained from PT. These include the comparison of data for a given measurement by different methods,the validation of new methods, and the provision of information for laboratories' customers and accreditationbodies. This paper reports on the subject of the participation of Puslit Kimia LIPI on PT for proximate analysis(ash, moisture, and fat content) in Powdered Tonic Food Drink (PTFD) by using SNI: 01-2891-1992. This PT wasorganized by Food and Nutrition Research Institute (FNRI)-Philippines. The PT scheme comprisses of theselection of analysis method, method verification, and analysis of proximate in PTFD sample followed byestimating its uncertainty. The final evaluation of PT by FNRI reported that Puslit Kimia LIPI has achieved asatisfactory result for proximate analysis in the PTFD sample. From this standpoint, it can be concluded that theSNI: 01-2891-1992 has shown great performance and gave comparable result to other participants from othercountries involved in this PT.

Co-Authors Anak Agung Istri Sri Wiadnyani Anny Sulaswatti Ayu Hindayani Burhanuddin Burhanuddin Dyah Styarini Evita Boes Harry Budiman Haryadi Haryadi Hilyati Hilyati M Greasia Oman Zuas Puspa Dewi R Endang Siti Isnijah Siti Isnijah S.P. Sujarwo Sujarwo Tasrif Tasrif

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