| ²é¿´: 532 | »Ø¸´: 1 | |||
| ±¾Ìû²úÉú 1 ¸ö ·ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴 | |||
תÍäΪÄãÏàÓö½ð³æ (³õÈëÎÄ̳)
|
[ÇóÖú]
ÕªÒª·Òë
|
||
|
Abstract. A spectrophotometric and derivative spectrophotometric study of Cu-dithizonate complex in aqueous phase in the presence of Triton X-100, a neutral surfactant, is reported. The system obeys Beer's law between 1.0 • 10 -6- 9.0 • 10 -6 mol/1 of Cu2+; detection limit is 12 ng/ml. The molar absorption coefficient, specific absorptivity and Sandell's sensitivity of the complex are 3.06 • 104 1 mo1-1 cm -1, 0.4825 ml g-1 cm-1 and 2.1 • 10 -3 pg cm -2, respectively. The conditional stability constant of the 1 : 2 complex, calculated considering simultaneously existing equilibria, has been found to be 1.73 • 1011 12 mo1-2 (I = 0.07, pH 1.4, temperature = 10~ Absorption studies in the derivative mode have been carried out to determine the absorption maximum of the complex and to overcome interference due to the presence of certain metal ions. The method has been validated by determination of copper in beers, wines, human hair, goat liver and fly ash samples. Key words: dithizone, copper dithizonate, derivative spectrophotometric determination |
» ²ÂÄãϲ»¶
071000ÉúÎïѧµ÷¼ÁÇóÖú
ÒѾÓÐ12È˻ظ´
¿¼ÑжþÂÖµ÷¼Á
ÒѾÓÐ7È˻ظ´
µ÷¼Á
ÒѾÓÐ8È˻ظ´
Çóµ÷¼Á ²ÄÁÏÓ빤³Ì 324·Ö ר˶
ÒѾÓÐ9È˻ظ´
0856ר˶Çóµ÷¼Á Ï£ÍûÊÇaÇøÔºÐ£
ÒѾÓÐ14È˻ظ´
Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
268·Ö085602»¯Ñ§¹¤³Ìµ÷¼Á
ÒѾÓÐ23È˻ظ´
»¹Óл¯¹¤¶þÂÖµ÷¼ÁµÄѧУÂð
ÒѾÓÐ41È˻ظ´
¿¼Ñе÷¼Á
ÒѾÓÐ21È˻ظ´
²ÄÁÏÓ뻯¹¤300Çóµ÷¼Á
ÒѾÓÐ28È˻ظ´
_¨ŠÈô¡§|ÏàÒÀ
ľ³æ (ÕýʽдÊÖ)
- ·ÒëEPI: 41
- Ó¦Öú: 2 (Ó×¶ùÔ°)
- ½ð±Ò: 1738.9
- É¢½ð: 37
- Ìû×Ó: 542
- ÔÚÏß: 77.1Сʱ
- ³æºÅ: 1716996
- ×¢²á: 2012-03-26
- ÐÔ±ð: MM
- רҵ: µç»¯Ñ§·ÖÎö
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
תÍäΪÄãÏàÓö: ½ð±Ò+20, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú, 20 2012-04-19 15:40:38
תÍäΪÄãÏàÓö: ½ð±Ò+20, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú, 20 2012-04-19 15:40:38
|
ÕªÒª£º¹ØÓÚ͵ÄË«ÁòëêÑθ´ºÏÎïÔÚº¬ÓбíÃæ»îÐÔ¼Á¾ÛÒÒ¶þ´¼ÐÁ»ù±½»ùÃѵÄË®ÏàÖеķֹâ¹â¶È·¨¡¢µ¼Êý·Ö¹â¹â¶È·¨µÄÑо¿±¨¸æ¡£¸ÃϵͳÔÚÍÀë×ÓµÄŨ¶È·¶Î§ÔÚ1.0 • 10 -6- 9.0 • 10 -6 mol/1ÄÚ×ñÑÀʲ®±È¶û¶¨ÂÉ£¬¼ì³öÏÞΪ12 ng/ml¡£¸Ã»¯ºÏÎïµÄĦ¶ûÎü¹âϵÊý£¬ÎüÊÕϵÊý£¬É£µÂ¶ûÁéÃô¶È·Ö±ðΪ3.06 • 104 1 mo1-1 cm -1, 0.4825 ml g-1 cm-1 and 2.1 • 10 -3 pg cm -2¡£´Ë1 : 2µÄ»¯ºÏÎ¿¼ÂÇ Í¬Ê±ÏÖÓÐµÄÆ½ºâ£¬Ìõ¼þÎȶ¨³£ÊýÒÑ·¢ÏÖÊÇ1.73•1011 12mo1-2£¨I= 0.07£¬PHÖµ1.4£¬Î¶ÈΪ10 ~ÎüÊÕÑо¿Öеĵ¼ÊýģʽÒѽøÐÐÁËÈ·¶¨¸Ã»¯ºÏÎï×î´óÎüÊպͿ˷þÓÉÓÚ´æÔÚijЩ½ðÊôÀë×ӵĸÉÈÅ¡£¸Ã·½·¨ÒÑÔڲⶨơ¾ÆÖеÄÍ£¬ÆÏÌѾƣ¬ ÈËÀàµÄÍ··¢£¬É½Ñò¸ÎÔàºÍ·Ûú»ÒÑùÆ·Öб»ÑéÖ¤ ¹Ø¼ü´Ê£ºË«Áòë꣬˫ÁòëêÍ£¬µ¼Êý·Ö¹â¹â¶È·¨²â¶¨ |

2Â¥2012-04-19 14:44:26













»Ø¸´´ËÂ¥