{"id":1752,"date":"2013-09-26T18:53:40","date_gmt":"2013-09-26T10:53:40","guid":{"rendered":"http:\/\/www.leadingtec.cn\/?p=1752"},"modified":"2016-05-06T15:27:17","modified_gmt":"2016-05-06T07:27:17","slug":"kjeldahl-determination","status":"publish","type":"post","link":"https:\/\/www.leadingtec.cn\/kjeldahl-determination.html","title":{"rendered":"\u7c97\u86cb\u767d\u7684\u5b9a\u91cf\u6d4b\u5b9a\u2014\u51ef\u6c0f\u5b9a\u6c2e\u6cd5"},"content":{"rendered":"

\u51ef\u6c0f\u5b9a\u6c2e\u6cd5\u662f\u6d4b\u5b9a\u5316\u5408\u7269\u6216\u6df7\u5408\u7269\u4e2d\u603b\u6c2e\u91cf\u7684\u4e00\u79cd\u65b9\u6cd5\u3002\u5373\u5728\u6709\u50ac\u5316\u5242\u7684\u6761\u4ef6\u4e0b\uff0c\u7528\u6d53\u786b\u9178\u6d88\u5316\u6837\u54c1\u5c06\u6709\u673a\u6c2e\u90fd\u8f6c\u53d8\u6210\u65e0\u673a\u94f5\u76d0\uff0c\u7136\u540e\u5728\u78b1\u6027\u6761\u4ef6\u4e0b\u5c06\u94f5\u76d0\u8f6c\u5316\u4e3a\u6c28\uff0c\u968f\u6c34\u84b8\u6c14\u998f\u51fa\u5e76\u4e3a\u8fc7\u91cf\u7684\u9178\u6db2\u5438\u6536\uff0c\u518d\u4ee5\u6807\u51c6\u78b1\u6ef4\u5b9a\uff0c\u5c31\u53ef\u8ba1\u7b97\u51fa\u6837\u54c1\u4e2d\u7684\u6c2e\u91cf\u3002\u7531\u4e8e\u86cb\u767d\u8d28\u542b\u6c2e\u91cf\u6bd4\u8f83\u6052\u5b9a\uff0c\u53ef\u7531\u5176\u6c2e\u91cf\u8ba1\u7b97\u86cb\u767d\u8d28\u542b\u91cf\uff0c\u6545\u6b64\u6cd5\u662f\u7ecf\u5178\u7684\u86cb\u767d\u8d28\u5b9a\u91cf\u65b9\u6cd5\u3002\"\"<\/span><\/p>\n

\u539f\u7406<\/span><\/h2>\n
\"\u51ef\u6c0f\u5b9a\u6c2e\u6cd5\"<\/a>
<\/span> \u51ef\u6c0f\u5b9a\u6c2e\u6cd5<\/span><\/figcaption><\/figure>\n
\u86cb\u767d\u8d28\u662f\u542b\u6c2e\u7684\u6709\u673a\u5316\u5408\u7269\u3002\u86cb\u767d\u8d28\u4e0e\u786b\u9178\u548c\u50ac\u5316\u5242\u4e00\u540c\u52a0\u70ed\u6d88\u5316\uff0c\u4f7f\u86cb\u767d\u8d28\u5206\u89e3\uff0c\u5206\u89e3\u7684\u6c28\u4e0e\u786b\u9178\u7ed3\u5408\u751f\u6210\u786b\u9178\u94f5\u3002\u7136\u540e\u78b1\u5316\u84b8\u998f\u4f7f\u6c28\u6e38\u79bb\uff0c\u7528\u787c\u9178\u5438\u6536\u540e\u518d\u4ee5\u786b\u9178\u6216\u76d0\u9178\u6807\u51c6\u6eb6\u6db2\u6ef4\u5b9a\uff0c\u6839\u636e\u9178\u7684\u6d88\u8017\u91cf\u4e58\u4ee5\u6362\u7b97\u7cfb\u6570\uff0c\u86cb\u767d\u8d28\u542b\u91cf\u3002\u542b\u6c2e\u91cf*6.25=\u86cb\u767d\u542b\u91cf.<\/span><\/div>\n
\u00a0<\/span><\/div>\n
1.\u6709\u673a\u7269\u4e2d\u7684\u80fa\u6839\u5728\u5f3a\u70ed\u548cCuSO4\uff0c\u6d53H2SO4 \u4f5c\u7528\u4e0b\uff0c\u785d\u5316\u751f\u6210\uff08NH4\uff092SO4<\/span><\/div>\n
\u53cd\u5e94\u5f0f\u4e3a\uff1a<\/span><\/div>\n
2NH2+H2SO4+2H=(NH4)2SO4 \uff08\u5176\u4e2dCuSO4\u505a\u50ac\u5316\u5242\uff09<\/strong><\/span><\/div>\n
2.\u5728\u51ef\u6c0f\u5b9a\u6c2e\u5668\u4e2d\u4e0e\u78b1\u4f5c\u7528\uff0c\u901a\u8fc7\u84b8\u998f\u91ca\u653e\u51faNH3 \uff0c\u6536\u96c6\u4e8eH3BO3 \u6eb6\u6db2\u4e2d<\/span><\/div>\n
\u53cd\u5e94\u5f0f\u4e3a:<\/span><\/div>\n
(NH4)2SO4+2NaOH=2NH3+2H2O+Na2SO4<\/strong><\/span><\/div>\n
2NH3+4H3BO3=(NH4)2B4O7+5H2O<\/strong><\/span><\/div>\n
\u00a0<\/span><\/div>\n
3. \u7528\u5df2\u77e5\u6d53\u5ea6\u7684H2SO4\uff08\u6216HCI\uff09\u6807\u51c6\u6eb6\u6db2\u6ef4\u5b9a\uff0c\u6839\u636eHCI\u6d88\u8017\u7684\u91cf\u8ba1\u7b97\u51fa\u6c2e\u7684\u542b\u91cf\uff0c\u7136\u540e\u4e58\u4ee5\u76f8\u5e94\u7684\u6362\u7b97\u56e0\u5b50\uff0c\u65e2\u5f97\u86cb\u767d\u8d28\u7684\u542b\u91cf<\/span><\/div>\n
\u53cd\u5e94\u5f0f\u4e3a\uff1a<\/span><\/div>\n
(NH4)2B4O7+H2SO4+5H2O=(NH4)2SO4+4H3BO3<\/strong><\/span><\/div>\n
(NH4)2B4O7+2HCl+5H2O=2NH4Cl+4H3BO3<\/strong><\/span><\/div>\n

2\u8bd5\u5242<\/span><\/h2>\n
\u6240\u6709\u8bd5\u5242\u5747\u7528\u4e0d\u542b\u6c28\u7684\u84b8\u998f\u6c34\u914d\u5236\u3002<\/span><\/div>\n
2.1\u00a0\u786b\u9178\u94dc\u3002<\/span><\/div>\n
2.2 \u786b\u9178\u94be\u3002<\/span><\/div>\n
2.3 \u786b\u9178\u3002<\/span><\/div>\n
2.4 2%\u787c\u9178\u6eb6\u6db2\u3002<\/span><\/div>\n
2.5 \u6df7\u5408\u6307\u793a\u6db2\uff1a1\u4efd0.1%\u7532\u57fa\u7ea2\u4e59\u9187\u6eb6\u6db2\u4e0e5\u4efd0.1%\u6eb4\u7532\u915a\u7eff\u4e59\u9187\u6eb6\u6db2\u4e34\u7528\u65f6\u6df7\u5408\u3002\u4e5f\u53ef\u75282\u4efd0.1%\u7532\u57fa\u7ea2\u4e59\u9187\u6eb6\u6db2\u4e0e1\u4efd0.1%\u6b21\u7532\u57fa\u84dd\u4e59\u9187\u6eb6\u6db2\u4e34\u7528\u65f6\u6df7\u5408\u3002<\/span><\/div>\n
2.6 30%\u6c22\u6c27\u5316\u94a0\u6eb6\u6db2\u3002<\/span><\/div>\n
2.7 0.025mol\/L\u786b\u9178\u6807\u51c6\u6eb6\u6db2\u62160.05mol\/L\u76d0\u9178\u6807\u51c6\u6eb6\u6db2\u3002<\/span><\/div>\n

3\u4eea\u5668<\/span><\/h2>\n
\u5b9a\u6c2e\u84b8\u998f\u88c5\u7f6e:<\/b><\/span><\/div>\n
\u5982\u56fe\u6240\u793a\u3002<\/span><\/div>\n
\n
\"ac4bd11373f08202313220164bfbfbedab641b72\"<\/a>\u51ef\u6c0f\u5b9a\u6c2e\u6cd5\u4eea\u5668<\/strong><\/span><\/div>\n

1.\u5b89\u5168\u7ba1<\/span><\/p>\n<\/div>\n

2.\u5bfc\u7ba1<\/span><\/div>\n
3.\u6c7d\u6c34\u5206\u79bb\u7ba1<\/span><\/div>\n
4.\u6837\u54c1\u5165\u53e3<\/span><\/div>\n
5.\u585e\u5b50<\/span><\/div>\n
6.\u51b7\u51dd\u7ba1<\/span><\/div>\n
7.\u5438\u6536\u74f6<\/span><\/div>\n
8.\u9694\u70ed\u6db2\u5957<\/span><\/div>\n
9.\u53cd\u5e94\u7ba1<\/span><\/div>\n
10.\u84b8\u6c7d\u53d1\u751f\u74f6<\/span><\/div>\n

4\u64cd\u4f5c<\/span><\/h2>\n
1\u3001\u6837\u54c1\u5904\u7406<\/strong>\uff1a\u7cbe\u5bc6\u79f0\u53d60.2-2.0g\u56fa\u4f53\u6837\u54c1\u62162-5g\u534a\u56fa\u4f53\u6837\u54c1\u6216\u5438\u53d610-20ml\u6db2\u4f53\u6837\u54c1\uff08\u7ea6\u76f8\u5f53\u6c2e30-40mg\uff09\uff0c\u79fb\u5165\u5e72\u71e5\u7684100ml\u6216500ml\u5b9a\u6c2e\u74f6\u4e2d\uff0c\u52a0\u51650.2g\u786b\u9178\u94dc\uff0c6g\u786b\u9178\u94be\u53ca20\u6beb\u5347\u786b\u9178\uff0c\u7a0d\u6447\u5300\u540e\u4e8e\u74f6\u53e3\u653e\u4e00\u5c0f\u6f0f\u6597\uff0c\u5c06\u74f6\u4ee545\u5ea6\u89d2\u659c\u652f\u4e8e\u6709\u5c0f\u5b54\u7684\u77f3\u68c9\u7f51\u4e0a\uff0c\u5c0f\u706b\u52a0\u70ed\uff0c\u5f85\u5185\u5bb9\u7269\u5168\u90e8\u70ad\u5316\uff0c\u6ce1\u6cab\u5b8c\u5168\u505c\u6b62\u540e\uff0c\u52a0\u5f3a\u706b\u529b\uff0c\u5e76\u4fdd\u6301\u74f6\u5185\u6db2\u4f53\u5fae\u6cb8\uff0c\u81f3\u6db2\u4f53\u5448\u84dd\u7eff\u8272\u6f84\u6e05\u900f\u660e\u540e\uff0c\u518d\u7ee7\u7eed\u52a0\u70ed0.5\u5c0f\u65f6\u3002\u53d6\u4e0b\u653e\u51b7\uff0c\u5c0f\u5fc3\u52a020ml\u6c34\uff0c\u653e\u51b7\u540e\uff0c\u79fb\u5165100ml\u5bb9\u91cf\u74f6\u4e2d\uff0c\u5e76\u7528\u5c11\u91cf\u6c34\u6d17\u5b9a\u6c2e\u74f6\uff0c\u6d17\u6db2\u5e76\u5165\u5bb9\u91cf\u74f6\u4e2d\uff0c\u518d\u52a0\u6c34\u81f3\u523b\u5ea6\uff0c\u6df7\u5300\u5907\u7528\u3002\u53d6\u4e0e\u5904\u7406\u6837\u54c1\u76f8\u540c\u91cf\u7684\u786b\u9178\u94dc\u3001\u786b\u9178\u94be\u3001\u6d53\u786b\u9178\u540c\u4e00\u65b9\u6cd5\u505a\u8bd5\u5242\u7a7a\u767d\u8bd5\u9a8c\u3002\u4f46\u662f\u6b64\u6cd5\u6bd4\u8f83\u5371\u9669\uff0c\u4e0d\u6613\u5728\u5b9e\u9a8c\u5ba4\u6f14\u793a\uff0c\u73b0\u5728\u5927\u591a\u6570\u5b9e\u9a8c\u5ba4\u6709\u6d88\u716e\u4eea\u4e00\u6b21\u53ef\u4ee5\u8fdb\u884c\u591a\u4e2a\uff08\u4e00\u6b21\u53ef\u4ee5\u6d88\u716e16\u4e2a\u6837\u54c1\uff09\u6837\u54c1\u5904\u7406\uff0c\u5e76\u6709\u901a\u98ce\u6a71\u8fdb\u884c\u901a\u98ce\uff0c\u6e29\u5ea6\u53ef\u4ee5\u81ea\u5df1\u8bbe\u5b9a\uff0c\u66f4\u52a0\u5b89\u5168\u548c\u53ef\u64cd\u4f5c\u6027\uff0c\u56e0\u6b64\u9010\u6b65\u6210\u4e3a\u4e3b\u8981\u7684\u51ef\u6c0f\u5b9a\u6c2e\u6cd5\u7684\u9996\u9009\u5904\u7406\u65b9\u6cd5\u3002<\/span><\/div>\n
\u4e00\u822c\u6d88\u89e3\u6e29\u5ea6\u90fd\u8bbe\u5728240\u5ea6\u53ca240\u5ea6\u4ee5\u4e0a\uff0c\u5982\u679c\u60f3\u5feb\u901f\u6d88\u89e3\u53ef\u4ee5\u9002\u5f53\u63d0\u9ad8\u6e29\u5ea6\u751a\u81f3\u53ef\u4ee5\u7528\u6700\u5927\u6e29\u5ea6\u8fdb\u884c\u6d88\u89e3\u3002<\/span><\/div>\n
\u00a0<\/span><\/div>\n
2\u3001<\/b>\u6309\u56fe\u88c5\u597d\u5b9a\u6c2e\u88c5\u7f6e\uff0c\u4e8e\u6c34\u84b8\u6c14\u53d1\u751f\u5668\u5185\u88c5\u6c34\u7ea62\/3\u5904\u52a0\u7532\u57fa\u7ea2\u6307\u793a\u5242\u6570\u6ef4\u53ca\u6570\u6beb\u5347\u786b\u9178\uff0c\u4ee5\u4fdd\u6301\u6c34\u5448\u9178\u6027\uff0c\u52a0\u5165\u6570\u7c92\u73bb\u7483\u73e0\u4ee5\u9632\u66b4\u6cb8\uff0c\u7528\u8c03\u538b\u5668\u63a7\u5236\uff0c\u52a0\u70ed\u716e\u6cb8\u6c34\u84b8\u6c14\u53d1\u751f\u74f6\u5185\u7684\u6c34\u3002<\/span><\/div>\n
\u00a0<\/span><\/div>\n
3\u3001<\/b>\u5411\u63a5\u6536\u74f6\u5185\u52a0\u516510ml 2%\u787c\u9178\u6eb6\u6db2\u53ca\u6df7\u5408\u6307\u793a\u52421\u6ef4\uff0c\u5e76\u4f7f\u51b7\u51dd\u7ba1\u7684\u4e0b\u7aef\u63d2\u5165\u6db2\u9762\u4e0b\uff0c\u5438\u53d610.0ml\u6837\u54c1\u6d88\u5316\u6db2\u7531\u5c0f\u73bb\u7483\u676f\u6d41\u5165\u53cd\u5e94\u5ba4\uff0c\u5e76\u4ee510ml\u6c34\u6d17\u6da4\u5c0f\u70e7\u676f\u4f7f\u6d41\u5165\u53cd\u5e94\u5ba4\u5185\uff0c\u585e\u7d27\u5c0f\u73bb\u7483\u676f\u7684\u68d2\u72b6\u73bb\u7483\u585e\u3002\u5c0610ml 40%\u6c22\u6c27\u5316\u94a0\u6eb6\u6db2\u5012\u5165\u5c0f\u73bb\u7483\u676f\uff0c\u63d0\u8d77\u73bb\u7483\u585e\u4f7f\u5176\u7f13\u6162\u6d41\u5165\u53cd\u5e94\u5ba4\uff0c\u4e0d\u80fd\u7acb\u5373\u5c06\u73bb\u7483\u76d6\u585e\u7d27\uff0c\u8fd9\u6837\u6613\u4f7f\u73bb\u7483\u585e\u7c98\u5728\u8fdb\u6837\u53e3\uff0c\u5e94\u5148\u7528\u84b8\u998f\u6c34\u51b2\u6d17\u7136\u540e\u518d\u76d6\uff0c\u5e76\u52a0\u6c34\u4e8e\u5c0f\u73bb\u7483\u676f\u4ee5\u9632\u6f0f\u6c14\u3002\u5939\u7d27\u87ba\u65cb\u5939\uff0c\u5f00\u59cb\u84b8\u998f\uff0c\u84b8\u6c14\u901a\u5165\u53cd\u5e94\u5ba4\u4f7f\u6c28\u901a\u8fc7\u51b7\u51dd\u7ba1\u800c\u8fdb\u5165\u63a5\u6536\u74f6\u5185\uff0c\u84b8\u998f5min\u3002\u79fb\u52a8\u63a5\u6536\u74f6\uff0c\u4f7f\u51b7\u51dd\u7ba1\u4e0b\u7aef\u79bb\u5f00\u6db2\u76bf\uff0c\u518d\u84b8\u998f1min\uff0c\u7136\u540e\u7528\u5c11\u91cf\u6c34\u51b2\u6d17\u51b7\u51dd\u7ba1\u4e0b\u7aef\u5916\u90e8\u3002\u53d6\u4e0b\u63a5\u6536\u74f6\uff0c\u4ee50.05N\u786b\u9178\u62160.05N\u76d0\u9178\u6807\u51c6\u6eb6\u6db2\u5b9a\u81f3\u7070\u8272\u6216\u84dd\u7d2b\u8272\u4e3a\u7ec8\u70b9\u3002<\/span><\/div>\n
\u540c\u65f6\u5438\u53d610.0ml\u8bd5\u5242\u7a7a\u767d\u6d88\u5316\u6db2\u63093\u64cd\u4f5c\u3002<\/span><\/div>\n

5\u8ba1\u7b97<\/span><\/h2>\n
X =(\uff08V1-V2\uff09*N*0.014)\/( m*\uff0810\/100\uff09) *F*100%<\/strong><\/span><\/div>\n
X\uff1a\u6837\u54c1\u4e2d\u86cb\u767d\u8d28\u7684\u767e\u5206\u542b\u91cf\uff0cg\uff1b<\/span><\/div>\n
V1\uff1a\u6837\u54c1\u6d88\u8017\u786b\u9178\u6216\u76d0\u9178\u6807\u51c6\u6db2\u7684\u4f53\u79ef\uff0cml\uff1b<\/span><\/div>\n
V2\uff1a\u8bd5\u5242\u7a7a\u767d\u6d88\u8017\u786b\u9178\u6216\u76d0\u9178\u6807\u51c6\u6eb6\u6db2\u7684\u4f53\u79ef\uff0cml\uff1b<\/span><\/div>\n
N\uff1a\u786b\u9178\u6216\u76d0\u9178\u6807\u51c6\u6eb6\u6db2\u7684\u5f53\u91cf\u6d53\u5ea6\uff1b<\/span><\/div>\n
0.014\uff1a1N\u786b\u9178\u6216\u76d0\u9178\u6807\u51c6\u6eb6\u6db21ml\u76f8\u5f53\u4e8e\u6c2e\u514b\u6570\uff1b<\/span><\/div>\n
m\uff1a\u6837\u54c1\u7684\u8d28\u91cf\uff08\u4f53\u79ef\uff09\uff0cg\uff08ml\uff09\uff1b<\/span><\/div>\n
F\uff1a\u6c2e\u6362\u7b97\u4e3a\u86cb\u767d\u8d28\u7684\u7cfb\u6570\u3002<\/b>\u86cb\u767d\u8d28\u4e2d\u7684\u6c2e\u542b\u91cf\u4e00\u822c\u4e3a15\uff5e17.6%\uff0c\u630916%\u8ba1\u7b97\u4e58\u4ee56.25\u5373\u4e3a\u86cb\u767d\u8d28\uff0c\u4e73\u5236\u54c1\u4e3a6.38\uff0c\u9762\u7c89\u4e3a5.70\uff0c\u7389\u7c73\u3001\u9ad8\u7cb1\u4e3a6.24\uff0c\u82b1\u751f\u4e3a5.46\uff0c\u7c73\u4e3a5.95\uff0c\u5927\u8c46\u53ca\u5176\u5236\u54c1\u4e3a5.71\uff0c\u8089\u4e0e\u8089\u5236\u54c1\u4e3a6.25\uff0c\u5927\u9ea6\u3001\u5c0f\u7c73\u3001\u71d5\u9ea6\u3001\u88f8\u9ea6\u4e3a5.83\uff0c\u829d\u9ebb\u3001\u5411\u65e5\u8475\u4e3a 5.30\u3002<\/span><\/div>\n

6\u6ce8\u610f<\/span><\/h2>\n
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