24СʱÈÈÃŰæ¿éÅÅÐаñ    

²é¿´: 2731  |  »Ø¸´: 6

²¤Âܲ¿Âä¸ñ

Ìú³æ (³õÈëÎÄ̳)

[ÇóÖú] ¹ØÓÚPBSµÄpH ÒÑÓÐ4È˲ÎÓë

±¾ÈË×öµ°°×£¬ÏëÅäpH7.5µÄPBS£¬²éÔÄÍøÉϵÄÌû×Ó£¬Ò»°ã¶¼ÊÇÈçÏ´𰸣ºÄ¸ÒºµÄÅäÖÆ£º
0.2M Na2HPO4£º³ÆÈ¡ 71.6g Na2HPO4-12H2O£¬ÈÜÓÚ 1000ml Ë®
0.2M NaH2PO4£º³ÆÈ¡ 31.2g NaH2PO4-2H2O£¬ÈÜÓÚ1000ml Ë®
¸÷ÖÖŨ¶ÈPB(pH=7.4)µÄÅäÖÆ£º
ÏÈÅä 0.2M PB (pH=7.4£¬100ml)£ºÈ¡19ml 0.2mol/LµÄ NaH2PO4£¬ 81ml 0.2mol/L µÄ Na2HPO4, ¼´¿É¡£
È»ºó Ö»Ð轫0.2M PB (pH=7.4)°´ÏàÓ¦±ÈÀýÊʵ±Ï¡ÊÍ ¼´¿É£¬È磺
0.1M PB£¨PH=7.4£© £ºÈ¡ 500ml 0.2M PB£¬¼ÓˮϡÊÍÖÁ 1000ml ¼´¿É¡£
0.01M PB £¨PH=7.4£©£ºÈ¡50ml 0.2M PB£¬¼ÓˮϡÊÍÖÁ 1000ml ¼´¿É¡£
0.02M PB £¨PH=7.4£©£ºÈ¡100ml 0.2 M PB£¬¼ÓˮϡÊÍÖÁ 1000ml ¼´¿É¡£
ÈôÐèÒª NaClµÄ»°£¬¼ÓÈë NaCl ÖÁ0.9%£¨g/100ml£©¼´¿É¡£
Áí£ºÆäËü¸÷ÖÖÁí PHÖµµÄ 0.2M PB£¨100ml)Åä·½ £º
pH 0.2M NaH2PO4£¨ml£© 0.2M Na2HPO4£¨ml£©
5.7 93.5 6.5
5.8 92 8
5.9 90 10
6.0 87.7 12.3
6.1 85 15
6.2 81.5 18.5
6.3 77.5 22.5
6.4 73.5 26.5
6.5 68.5 31.5
6.6 62.5 37.5
6.7 56.5 43.5
6.8 51 49
6.9 45 55
7.0 38 62
7.1 33 67
7.2 28 72
7.3 23 77
7.4 19ml 81ml
7.5 16 84
7.6 13 87
7.7 10.5 0.5
7.8 8.5 91.5
7.9 7 93
8.0 5.3 94.7
  ¿ÉÊÇÎÒÊÔ¹ý£¬Èç¹û°´ÒÔÉÏ·½·¨Å䣬pHÊÇ´óÓÚ7.5µÄ£¬Èô¼ÓÈëÏàÓ¦µÄNaCl£¬ÔòΪ7.5£¬ËùÒÔÎÒÏëÇëÎÊNaClµ½µ×¶ÔPBSµÄpH ÓÐûÓÐÓ°Ïì°¡£¿
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

dxh86412

Í­³æ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
youlinglyw: ½ð±Ò+3, ÔùÈËõ¹åÊÖÓÐÓàÏ㣬ÉúÎï¿ÆÑ§ÓÐÄã¸ü¾«²Ê£¡ 2014-09-16 21:09:36
nacl¶ÔphûÓÐÓ°Ï죬ӰÏìphµÄÊÇÁ×ËáÑÎŨ¶ÈºÍÄãµÄË®
2Â¥2014-09-13 23:01:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

Luse_91

гæ (ÖøÃûдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ÏÖÔÚ²»ÊÇÓÐÅäºÃµÄPBSÖ±½ÓË®ÈÜ£¬¾Í¿ÉÒÔÓÃÁËÂï¡£ÎÒÃÇʵÑéÊÒ¶¼ÊÇÖ±½ÓÈܵÄàÏ£¡

[ ·¢×ÔÊÖ»ú°æ http://muchong.com/3g ]
ÄîÖ»ÄîÄÇÏàÓöµÄһ˲¼äΪÄã°Ñʱ¿Õ´©Ô½Ô¹ÄªÔ¹Õ⺬ÀáµÄһ˫ÑÛתÑÛ¼ä²×º£É£ÌïÄîµÄÔ¹µÄ¶¼Ëµ°®ÊÇ×Ô¼ºµÄÐÅÄî·­ÔÆÊÖÊÖÖÐÔ¾ÛÁËÉ¢Á˲ÅÖªÔµÊÇ·²ÐÄÒ»µã
3Â¥2014-09-14 00:00:46
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

èµÔÂ

¾èÖú¹ó±ö (ÕýʽдÊÖ)

Â¥Ö÷µÄPBSÅä·½²»¶Ô°É£¬Ó¦¸ÃÊÇÓмØÑεġ£
4Â¥2014-09-14 09:45:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

°µÒ¹Á÷ɳ

Òø³æ (СÓÐÃûÆø)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï
¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
youlinglyw: ½ð±Ò+2, ÔùÈËõ¹åÊÖÓÐÓàÏ㣬ÉúÎï¿ÆÑ§ÓÐÄã¸ü¾«²Ê£¡ 2014-09-16 21:09:52
sigmaºÍinvitrogen¶¼ÓзÛĩ״µÄ²úÆ·£¬Ö±½ÓË®ÈܾͿÉʹÓã¬Ò»°ã²»Óõ÷½Úph

[ ·¢×ÔСľ³æ¿Í»§¶Ë ]
Óù½£½­ºþ£¬Ò»ÉúÇ飬һÉíéä
5Â¥2014-09-16 20:47:58
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

256k

гæ (ÕýʽдÊÖ)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¡ï ¡ï ¡ï
²¤Âܲ¿Âä¸ñ: ½ð±Ò+3, ¡ïÓаïÖú 2014-09-21 10:28:59
Á×ËábufferµÄpKaÊÜÈÜÒºÀë×ÓÇ¿¶ÈµÄÓ°Ï죬ϡÊÍ»áÓ°ÏìpH
6Â¥2014-09-17 20:39:20
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

ŬÁ¦ÖÐѧϰ

гæ (³õÈëÎÄ̳)

7Â¥2019-10-22 11:19:55
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ ²¤Âܲ¿Âä¸ñ µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[»ù½ðÉêÇë] 2026¹ú×ÔÈ»º¯ÆÀ·Ñµ½ÕË +17 ÑòÑü°å 2026-08-21 18/900 2026-08-24 12:03 by iaeyuan
[»ù½ðÉêÇë] ÅóÓÑȦ¿´µ½µÄ +7 wangzilk 2026-08-18 9/450 2026-08-24 10:50 by cmrandy
[»ù½ðÉêÇë] ÄÜ·ñÍ˳ö²ÎÓëµÄÃæÉÏÏîÄ¿½â³ýÏÞÏî +11 koalala 2026-08-24 13/650 2026-08-24 10:49 by anjeeshine
[»ù½ðÉêÇë] ÈÃÎÒÖÐÒ»¸öÃæÉϰɣ¡ +13 ´óƼ1987 2026-08-20 16/800 2026-08-24 10:23 by ̫ɵÁË
[»ù½ðÉêÇë] ¿ÆÑй¶ùÌ«ÄÑÁË +18 ÎÒ4´ó°×²Ë 2026-08-20 19/950 2026-08-24 09:47 by ¿­¶÷¹ãÊ¢´ß»¯·ÖÎ
[»ù½ðÉêÇë] Ã÷ÌìÓ¦¸Ã¿É²éÁË£¡£¿ +4 chengyan1220 2026-08-23 4/200 2026-08-24 08:47 by gloomy6159
[»ù½ðÉêÇë] ʲôʱºò¿ª½±£¿ +10 CrisMessi 2026-08-18 11/550 2026-08-24 06:50 by ¿ªÐĵÄСʨ×Ó
[½Ìʦ֮¼Ò] Ìø²ÛºóÔÚÑÐÏîÄ¿Ôõô°ì£¿ +5 ¼òµ¥»¯xn 2026-08-22 10/500 2026-08-23 12:38 by ¼òµ¥»¯xn
[»ù½ðÉêÇë] 93BebMhtakhǰºó11λ¿ªÍ·¶¼ÊÇ´óд +7 ÇÒÌý»¢Ð¥ 2026-08-17 8/400 2026-08-22 21:55 by ҽѧÀÏÄк¢
[»ù½ðÉêÇë] Ö»ÓÐÿÄêÕâÖÖʱºòÀ´¹ä¹äСľ³æ +24 yaoyewhu2008 2026-08-20 26/1300 2026-08-22 17:43 by kammury
[»ù½ðÉêÇë] ÈËÆø²»ÐÐÁË +8 fansofjerry 2026-08-21 8/400 2026-08-22 16:30 by zyqchem
[»ù½ðÉêÇë] ½ñÌì»ù½ð»á³ö½á¹ûÂð£¿20260819 +16 kkkl_v 2026-08-19 17/850 2026-08-22 16:12 by °¢²¼Abu
[»ù½ðÉêÇë] ½ñÈÕ²»·Å°ñ£¿Íø´«¹ú×ÔȻԤ¼Æ 8 Ô 27 Èտɲé½á¹û +16 ҽѧÀÏÄк¢ 2026-08-20 20/1000 2026-08-21 21:13 by Ldrop2023
[»ù½ðÉêÇë] ¿´À´½ñÌì²»»á·Å°ñÁË£¿ +8 chengyan1220 2026-08-21 11/550 2026-08-21 17:52 by dcqxinyang
[»ù½ðÉêÇë] ÎÒÃæÉÏÍêµ°ÁË +7 ÇÒÌý»¢Ð¥ 2026-08-20 8/400 2026-08-21 12:31 by ¿á¿áÄ«¾µ
[»ù½ðÉêÇë] Ó¦¸ÃÊÇÏÂÖÜÈý26ÈÕ¹«²¼Á˰ɣ¿ +4 ¹þ¹þ¸ò£¿ 2026-08-21 4/200 2026-08-21 10:58 by Vivilian
[ÂÛÎÄͶ¸å] Ͷ¸å×Éѯ +5 wwm09 2026-08-17 7/350 2026-08-21 10:11 by ÆÚ¿¯ÂÛÎİïÊÖ
[»ù½ðÉêÇë] ½ñÌì·Å°ñûϷÁ衃 +9 yuleib84 2026-08-19 11/550 2026-08-21 10:06 by gltch
[»ù½ðÉêÇë] »ù½ð°¡»ù½ð +4 longfie172 2026-08-20 4/200 2026-08-21 08:58 by mark mao
[»ù½ðÉêÇë] ÖØÒªÏûÏ¢£¬ÖÐÎçϵͳÔÚά»¤ +11 yuleib84 2026-08-18 12/600 2026-08-20 11:09 by xskun
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û