±½¼×ËáÀࡢɽÀæËáÀà¿ÉÒÔ×÷ʳƷ·À¸¯¼Á£¬¾ßÓнϸߵĿ¹¾úÐÔÄÜ£¬ÒÖÖÆÃ¹¾úµÄÉú³¤×ÌÉú¡£µ«±½¼×Ëá¾ßÓÐÒ»¶¨µÄ¶¾ÐÔ£¬ºã¾ÃʹÓûáÒýÆðÈËÂýÐÔ±½Öж¾£¬µ¼ÖÂÍ·Í´¡¢Í·ÔΡ¢Ó°ÏóÁ¦¼õÍË¡¢Ê§Ãß¡¢·¦Á¦¡¢Éñ¾Ë¥Èõ¡¢°×ϸ°ûÊýÁ¿¼õÉÙµÈÖ¢×´£¬¶Ô¸Î¡¢ÉöµÈÆ÷¹Ù±¬·¢²»Á¼Ó°Ï죬ÑÏÖØ¿ÉÄܻᵼÖÂÔÙÉúÕϰÐÔÆ¶Ñª¡£ºã¾ÃʳÓÃɽÀæËẬÁ¿³¬±êµÄʳƷ£¬¿ÉÄÜ»áÒÖÖÆ¹Ç÷ÀÉú³¤£¬²¢¶Ô¸Î¡¢ÉöµÈÆ÷¹Ù±¬·¢²»Á¼Ó°Ïì¡£ÆøÏàÉ«Æ×ÖÊÆ×ÁªÓÃÒÇ£¨GCMS£©±¾×ŶÔδ֪»¯ºÏÎïɸѡµÄ¾Þ´óÓÅÊÆ£¬¹ã·ºÓ¦ÓÃÓÚÖÊÁÏÖÐÓж¾Óк¦ÎïÖʵ͍ÐÔ¶¨Á¿ÆÊÎö¡£Ê¹ÓÃÆøÏàÉ«Æ×ÊèÉ¢£¬½ÓÄɵç×Óºä»÷µçÀëÔ´£¨EI£©È«É¨ÃèµÄģʽ£¬¿ÉÒÔÍê³É»¯ºÏÎïµÄɸ²é£¬½ÓÄÉGCMS-SIMµÄģʽ¿ÉÒÔ×ö׼ȷµÄ¶¨Á¿ÆÊÎö¡£
1.ÒÇÆ÷¼ò½é
GC-MS 6800ÊÇÃÀʨ¹ó±ö»áÒÇÆ÷¾«ÐÄ´òÔìµÄÒ»¿î¸ßÐÔ¼Û±ÈÆøÏàÉ«Æ×ÖÊÆ×ÁªÓÃÒÇ£¬¾ßÓÐÍêÈ«µÄ×ÔÖ÷֪ʶ²úȨ£¬ÓµÓжàÏîרÀû¼¼Êõ£¬¿É¹ã·ºÓ¦ÓÃÓڸ߷Ö×ÓÖÊÁÏ¡¢Çé¿ö±£»¤¡¢µç×ÓµçÆ÷¡¢Ò½Ò©¡¢Ê¯ÓÍ»¯¹¤¡¢Ê³Æ·Äþ¾²¡¢·Ä֯Ƥ¸ïµÈ¶àÐÐÒµÖÐÓк¦ÎïÖʵļì²â¡£
ͼ1.GC-MS 6800ÆøÏàÉ«Æ×ÖÊÆ×ÁªÓÃÒÇÍâ¹Ûͼ
2.ʵÑ鲿·Ö
2.1 ²âÊÔÔÀí
ÑùÆ·¾¼ôËéºó׼ȷ³ÆÈ¡£¬Ê¹ÓÃÓлúÈܼÁ³¬ÉùÝÍÈ¡£¬ÝÍȡҺ¾¹ýÂ˺ó£¬ÓÃGCMSÆÊÎö¡£ÒÀ¾ÝÄ¿±ê»¯ºÏÎïµÄ±£´æÊ±¼äºÍ±ê×¼ÖÊÆ×ͼ»òÌØÕ÷Àë×Ó¶¨ÐÔ£¬ÓÃÍâ±ê·¨¶¨Á¿¡£
2.2Ö÷ÒªÒÇÆ÷É豸¡¢ºÄ²ÄºÍÊÔ¼Á
GC-MS 6800 ÆøÏàÉ«Æ×ÖÊÆ×ÁªÓÃÒÇ£¬ÅäÓеç×Óºä»÷Ô´£¨ÃÀʨ¹ó±ö»á£©
ɽÀæËá±ê׼Ʒ£º´¿¶È99%£¨¹ú¼Ò±ê×¼ÎïÖÊÍø£©£»
±½¼×Ëá±ê׼Ʒ£º´¿¶È99%£¨¹ú¼Ò±ê×¼ÎïÖÊÍø£©£»
Õý ¼º Í飺HPLC¼¶£¨Ä¬¿Ë¼¯ÍÅ£©£»
ÒÒ Ëá ÒÒ õ¥£ºHPLC¼¶£¨Ä¬¿Ë¼¯ÍÅ£©¡£
2.2 ÒÇÆ÷²âÊÔÌõ¼þ
É«Æ×Öù£º HP-INNOWAX£¬30m¡Á0.25mm¡Á0.25¦Ìm£»
ÖùÏä³ÌÐòÉýÎÂÌõ¼þ£º³õʼζÈ100¡æ£¬15¡æ/minÉýÖÁ250¡æ¼á³Ö3min£»
½øÑù·½·¨£º²»·ÖÁ÷½øÑù£¬²»·ÖÁ÷ʱ¼ä1min£»
½øÑùÁ¿£º1.0¦ÌL£»
½øÑù¿Úζȣº250¡æ£»
ÆøÖʽӿÚζȣº250¡æ£»
Àë×ÓԴζȣº250¡æ£»
ÔØÆø£ºº¤Æø£¬´¿¶È¡Ý99.999%£¬Á÷ËÙ1.0mL/min£»
µçÀë·½·¨£ºEI£»
µçÀëÄÜÁ¿£º70eV£»
ÈܼÁÇгýʱ¼ä£º7min
²â¶¨·½·¨£ºTIC£¨FULL SCAN£©¶¨ÐÔ£¨É¨Ãè¹æÄ££º50-150amu£©£¬SIMģʽ¶¨Á¿¡£
3.²âÊÔ½á¹û
3.1 2ÖÖÄ¿±êÎï×é·Ö¶¨ÐÔ½á¹û
ͼ2.Ä¿±êÎï×ÜÀë×ÓÁ÷É«Æ×ͼ
1.ɽÀæËᣨSorbic acid£© 2. ±½¼×ËᣨBenzoic Acid£©
ͼ3.ɽÀæËáÖÊÆ×ͼ
ͼ4.±½¼×ËáÖÊÆ×ͼ
±í1.¸÷Ä¿±êÎï»ù±¾²âÊÔÐÅÏ¢
|
»¯ºÏÎï
|
Ó¢ÎÄÃû³Æ
|
CASºÅ
|
ÌØÕ÷Àë×Ó
|
|
ɽÀæËá
|
Sorbic acid
|
110-44-1
|
112*
67 97
|
|
±½¼×Ëá
|
Benzoic Acid
|
65-85-0
|
122*
77 105
|
3.2 ÑùÆ·²âÊÔ
Ä¿±êÎïÔÚ5ppm-100ppmÏßÐÔÁ¼ºÃ¡£È¡¿Õ°×ʳƷÑùÆ·¼Ó±ê£¬ÑùÆ·¾¹ýÕý¼ºÍéºÍÒÒËáÒÒõ¥£¨1+1£©³¬ÉùÝÍÈ¡¡£20ppm¼Ó±êˮƽÏÂÆ×ͼÈçÏ£¬»ñµÃÁ˱ȽÏÂúÒâµÄЧ¹û¡£
ͼ5.20ppm¼Ó±êÏÂSIMÉ«Æ×ͼ
1.ɽÀæËᣨSorbic acid£© 2. ±½¼×ËᣨBenzoic Acid£©
4.×ܽá
±¾ÊµÑé½ÓÄÉGC-MS 6800£¬ÔÚSIMɨÃèģʽ϶ÔɽÀæËáºÍ±½¼×ËữºÏÎï½øÐвâÊÔºÍÆÊÎö£¬ÒªÁìÎȶ¨¿É¿¿£¬ÏßÐÔ¹æÄ£ºÃ£¬ÁéÃô¶È¸ß£¬ÊÜÔÓÖÊ·åµÄ×ÌÈÅС£¬Äܹ»ÓÐЧµØ¶ÔʳƷÖÉñ¿±ê»¯ºÏÎï½øÐж¨ÐÔ¶¨Á¿ÆÊÎö¡£
5.²Î¿¼ÎÄÏ×
[1] GB 5009.28-2016 ʳƷÖб½¼×ËᡢɽÀæËáºÍÌǾ«ÄƵIJⶨ