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Aspectrophotometric determinationmethod for microamount of zirconium with anew chromogenic reagent DBMCA is de-scribed. In 1.6 mol/L HCl medium thereagent reacts with zirconium to form a 3:1blue complex, The molar absorptivity is 3.7¡Á10£þ4L¡¤mol£þ(-1)¡¤cm£þ(-1) at 640nm, Beer's lawis obeyed for 0¡«15¦Ìg of zirconium in 25mLsolution. ÔÚ1£®6mol£¯LÑÎËá½éÖÊÖУ¬ï¯ÓëÊÔ¼Á¶þäå¼×»ùżµªôÈëÏ£¨DBMCA£©ÐγÉ1£º3µÄÀ¶É«ÅäºÏÎ¦Ë£ß£¨max£©£½640nm£¬±í¹ÛĦ¶ûÎü¹âϵÊý¦Å£½3£®7¡Á10£þ4L¡¤mol£þ£¨£1£©¡¤cm£þ£¨£1£©£¬ï¯Á¿ÔÚ0¡«15¦Ìg£¯25mL·¶Î§ÄÚ·ûºÏ±È¶ú¶¨ÂÉ¡£ ¶Ì¾äÀ´Ô´ In 0. 24 mol¡¤L£þ(-1)H_(3)PO_(4) medium,barium reacts with the reagentto form a blue complex which has an absorpionmaximum at 632 nm with a molar absorptivityof 7, 31¡Á 10£þ4 L¡¤mol£þ(-1). cm£þ(-1). ÔÚ0£®24mol¡¤L£þ£¨£1£©H£ß£¨3£©PO£ß4½éÖÊÖÐÊÔ¼ÁÓë±µÐγÉÀ¶É«ÅäºÏÎÔÚ632nm´¦¾ßÓÐ×î´óÎü¹â¶È£¬Ä¦¶ûÎü¹âϵÊýΪ7£®13¡Á10£þ4L¡¤mol£þ£¨£1£©¡¤Cm£þ£¨£1£©¡£ ¶Ì¾äÀ´Ô´ Gallium forms a blue complex with 1,5-di-(2-hydroxy-5-sulfophenyl)-3-cyanoformazan disodium salt(DSPCF)at PH 4(HAc-NaAc buffer). ³£ÎÂÏÂÔÚpH4µÄHAc£NaAc»º³åÌåϵÖУ¬GaÓë1£¬5£¶þ£¨2£ôÇ»ù£5£»Ç»ù±½»ù£©£3£Çè»ù¼×¡¡£¨DSPCF£©ÐγÉÎȶ¨µÄÀ¶É«ÅäºÏÎï¡£ ¶Ì¾äÀ´Ô´ A 1¡Ã1 blue complex of bromosulfonazo(¢ó) and Ba(¢ò) was fromed in a wide range of acid media. Ñо¿ÁËżµªäå»Ç£¨¢ó£©ÓëBa2£«ÅäºÏÎïµÄ¹â¶ÈÌØÕ÷ºÍÏÔÉ«·´Ó¦µÄ×î¼ÑÌõ¼þ¡£ ÔڽϿíµÄpH·¶Î§ÄÚ£¬ÊÔ¼ÁÓë±µÐγÉ1¡Ã1µÄÀ¶É«ÅäºÏÎï¡£ ¶Ì¾äÀ´Ô´ A color-reaction of bismuth with arsenazo ¢ó is investigated. A blue complex was formed in the medium of HClO_4 (0.50 mol/L). The molar absorptivity of the complex is 1.7210~4 L/(molcm) at 606 nm. Ñо¿ÁËÏÔÉ«¼ÁżµªëÏ¢óÓëîéµÄÏÔÉ«·´Ó¦,ÔÚ0.50mol/LµÄHClO4½éÖÊÖÐ,ÊÔ¼ÁÓëîéÉú³ÉÀ¶É«ÅäºÏÎï,×î´óÎüÊÕ²¨³¤606nm,Ħ¶ûÎü¹âϵÊý(¦Å)=1.72¡Á104L/(mol.cm),·½·¨ÁéÃô¶È¸ß,³£¼û½ðÊôÀë×ÓÔÊÐíÁ¿´ó,Ñ¡ÔñÐԺᣠ|
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