Studies on the formation of polyion complexes by means of colloid titration method

1979 ◽  
Vol 72 (5-6) ◽  
pp. 421-431 ◽  
Author(s):  
Takashi Korenaga
Keyword(s):  
Titration Method ◽  
Colloid Titration ◽  
Polyion Complexes

scholarly journals The Effects of Short-Term Storage and Elevated Temperatures on the Flocculation Activity of Aqueous Polymer Solutions

1983 ◽  
Vol 18 (1) ◽  
pp. 23-44 ◽  
Author(s):  
R. Gehr ◽  
R. Kalluri
Keyword(s):  
Elevated Temperatures ◽  
Waste Treatment ◽  
Solid Phase ◽  
Polystyrene Latex ◽  
Titration Method ◽  
Treatment Processes ◽  
Aqueous Polymer ◽  
Flocculation Activity ◽  
Colloid Titration ◽  
Trace Concentrations

Abstract Polyelectrolytes applied to water and waste treatment processes are generally assumed to be totally adsorbed to the sludge or solid phase. However it has previously been found that significant quantities of polyelectrolyte may appear in the effluent or liquid phase. This study developed a sensitive method, specifically a polystyrene latex test suspension, to detect trace concentrations of unmodified polyelectrolytes in distilled water as well as process effluents. A colloid titration method, as well as the test suspension were then used to assess the effects of storage at ambient and elevated temperatures. Both methods indicated that storage of polyelectrolyte at ambient and elevated temperatures could significantly reduce the effective charge (as measured by the colloid titration method) and the effective flocculating ability (as measured by the test suspension).

Pengaruh Jumlah Pencucian Beras dengan Kadar Klorin

2017 ◽  
Vol 1 (1) ◽  
pp. 89
Author(s):  
Indah Purwaningsih ◽  
Supriyanto Supriyanto
Keyword(s):  
Mucous Membrane ◽  
Confidence Level ◽  
Iodometric Titration ◽  
Titration Method ◽  
Anova Test ◽  
Average Value ◽  
Significant Difference ◽  
The Difference

Abstract: Chlorine is a green halogen-shaped halogen gas at normal temperature and serves as bleach, stain remover and disinfectant. Chlorine is now widely used for bleaching rice so that less quality rice looks like quality rice. Chlorine is very toxic and causes mucous membrane irritation, highly reactive and very powerful oxidizer. The purpose of this research was to determine the difference of chlorine level in chlorinated rice washed once, twice and 3 times. The sample in this study amounted to 11 samples calculated by replication formula. Each sample was treated 3 times, ie 1 washed once, 2 washed twice and washed 3 times. The samples then examined by iodometric titration method. Based on the results of the study using ANOVA test, 11 samples obtained the average value of chlorine after washed once amount of 0.0176%, after washed twice amount of 0.0111%, and after washed 3 times amount of 0.0052% with the value significance p = 0.03 (p <0.05) at 95% confidence level which means there was a significant difference between chlorine levels in chlorinated rice washed once, twice and 3 times.Abstrak: Klorin merupakan unsur halogen berbentuk gas berwarna kuning kehijauan pada suhu normal danberfungsi sebagai pemutih, penghilang noda maupun desinfektan. Klorin sekarang banyak digunakan untuk bahan pemutih beras agar beras yang kurang berkualitas tampak seperti beras berkualitas. Klorin sangat toksik dan menyebabkan iritasi membran mukosa, sangat reaktif dan merupakan oksidator yang sangat kuat. Tujuan dari penelitian ini ialah untuk mengetahui perbedaan kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali. Sampel dalam penelitian ini berjumlah 11 sampel yang dihitung dengan rumus replikasi. Setiap sampel diberi perlakuan sebanyak 3 kali, yaitu 1 kali pencucian, 2 kali pencucian dan 3 kali pencucian. Sampel penelitian kemudian diperiksa dengan metode titrasi iodometri. Berdasarkan hasil penelitian menggunakan uji Anova secara komputerisasi terhadap 11 sampel diperoleh nilai rata-rata kadar klorin setelah 1 kali pencucian sebesar 0,0176 %, setelah 2 kali pencucian sebesar 0,0111 %, dan setelah 3 kali pencucian sebesar 0,0052 % dengan nilai signifkansi p = 0,03 (p<0,05) pada tingkat kepercayaan 95% yang artinya ada perbedaan yang bermakna antara kadar klorin pada beras berklorin yang dicuci sebanyak 1 kali, 2 kali dan 3 kali.

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