#TITLE_ALTERNATIVE#

• Main Author: SUITA DEVI (NIM : 13303077); Pembimbing : Dr. Ir. Endang Juliastuti Ms; Dr. Ir. Nugraha, IRA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/16091
• Institution: Institut Teknologi Bandung

The basic principle of instrument for measuring concentrate of ammoniac within water is light absorption by ammoniac solution. Chemical cluster of ammoniac absorb advance light in range 990-1000 nm (infrared) length of waves theoretically. <br /> <br /> <br /> Indophenols blue method used in this research so that length measurement of light waves can be done. Indophenols blue solution is alkali solution with pH 10, 4-11, 5 formed in existence of ammonium ion allied with hypochlorite, which is forming monochloramine. Monochloramine , hypochlorite and phenol will perform indophenols , the blue colored solution. Then nitroprusside will used as catalyst. <br /> <br /> <br /> This procedure will result NH4 + + ClO- + H2O HC12H6Cl2O2N reaction chemically. <br /> <br /> <br /> Experiment held with make various kind of concentrate. There are 6 kind of concentrate, and went on dilute solution. Laser beam fall into solution in a cuvet, because a beam spreading after through cuvet so used positif lens to accumulate ligaht into fotodioda sensor. A light source ia Laser He-Ne &#955;= 632,8 nm. During experiments demand change time of heat, measerument of temperature, also change physical on solution condition. <br /> <br /> <br /> In a experiment of result, contiuned by make a regresi equation from experiment result. In y = mx+b equation form. The final regression equation is y =-6.905 x + 9.4655 Validation solution have various kind of concentrate. There are eight kinds of concentrate. Each of concentrate tested to make certain about concentration value measurable (x=y-b/m). Maximum error in validation solution is 79 % which is match at 6 ppm ammoniac concentration.And minimum error 5 % when concentrate ammoniac reached 0.32 ppm.