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【新品推荐】食醋中总酸和不挥发酸质控样全新上市，欢迎选购！

来源：北京北纳创联生物技术研究院分类：前瞻 2024-04-01 14:30:12 12阅读次数

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食醋中总酸和不挥发酸质控样

食醋风味与其中所含的挥发酸和不挥发酸的含量有密切关系，食醋中有机酸主要成分是醋酸，为挥发酸，是食醋酸味的主要来源，此外，还含其他有机酸，如乳酸、琥珀酸、柠檬酸等。因此，测定食醋的挥发酸和不挥发酸含量在一定程度上，对于辨别食醋风味优劣有重要意义。

GB 2719-2018《食品安全国家标准食醋》中规定了食醋总酸≥3.5g/100mL（乙酸计），甜醋总酸含量≥2.5g/100mL（乙酸计）。GB/T 18187-2000 《酿造食醋》中规定了固态发酵食醋的不挥发酸含量≥0.50g/100mL（乳酸计）。

新品信息

研制方法

本标准物质选用市售食醋为原料，含量初测满足要求后，在洁净环境中，经过混匀、灭菌、分装而成。参照JJF1343 国家计量技术规范（等效ISO指南35），对分装后的样品进行随机抽样，（参考《GB/T 12456-2021 食品安全国家标准食品中总酸的测定》和《GB/T 18187-2000 酿造食醋》检测方法）对该标准物质进行均匀性检验和稳定性跟踪考察。结果表明：均匀性符合F检验规则，稳定性考察良好。

应用领域

本标准物质可作为工作标准，用于日常分析和检测；也可用于方法验证和实验室间比对等实验室质量控制。

注意事项

（4±4）℃及避光条件下保存，使用前应恒温至（20±3）℃，并充分摇动以保证均匀。使用中严格防止沾污；最小取样量为1mL。本标准物质仅供实验室使用，不得食用。

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如需了解更多产品信息欢迎登陆北纳标物网www.biaowu.com可点击在线客服或拨打热线电话010-58103778进行询问，我们将竭诚为您服务！

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[8]未定义数组索引: page
[8]未定义数组下标: 0
[2]Declaration of app\common\model\News::getAllList($filter = Array, $limit = 16, $order = Array, $with = Array) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\Company::getAllList($filter = Array, $limit = 20) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]Only variables should be passed by reference
[2]Declaration of app\common\model\NewsComment::getAllList($filter = Array, $limit = 16) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8192]Function create_function() is deprecated
[8192]Function create_function() is deprecated
[8]未定义数组索引: area
[8]未定义数组索引: st
[2]Declaration of app\common\model\Topic::getList($filter = Array) should be compatible with app\common\model\BaseModel::getList($filter = Array, $sort = Array)
[2]Declaration of app\common\model\Topic::getAllList($filter = Array, $field = 'id,md5,tit...', $limit = 0) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\TopicInfoList::getAllList($filter = Array, $limit = 8) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
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[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: goods_list
[8]未定义数组下标: 0
[8]未定义数组索引: center
[8]未定义数组索引: center
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[ SQL ] SHOW COLUMNS FROM `topic_info_list` [ RunTime:0.000695s ]
[ SQL ] SELECT * FROM `topic_info_list` WHERE `topic_id` = 1 ORDER BY `id` DESC LIMIT 2 [ RunTime:0.000159s ]
[ SQL ] SELECT * FROM `news` WHERE `id` IN (864,849) [ RunTime:0.000185s ]
[ SQL ] SELECT `id`,`md5`,`title`,`created_time` FROM `news` WHERE `review_status` = 1 AND `is_show` = 1 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000164s ]
[ SQL ] SHOW COLUMNS FROM `user` [ RunTime:0.000690s ]
[ SQL ] SELECT `a`.* FROM `user` `a` INNER JOIN `news` `b` ON `a`.`id`=`b`.`user_id` GROUP BY `a`.`id` ORDER BY `b`.`id` DESC LIMIT 10 [ RunTime:0.009346s ]
[ SQL ] SELECT * FROM `user_info` WHERE `user_id` IN (351,466,458,209,372,521,819,385,657,412) [ RunTime:0.000730s ]
[ SQL ] SHOW COLUMNS FROM `seo` [ RunTime:0.000755s ]
[ SQL ] SELECT * FROM `seo` WHERE `column_type` = '02' AND `page_type` = 'news' AND `info_id` = 6560 LIMIT 1 [ RunTime:0.000185s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6560 [ RunTime:0.001657s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7820 [ RunTime:0.001601s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7313 [ RunTime:0.001629s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6822 [ RunTime:0.001639s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6374 [ RunTime:0.001589s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6228 [ RunTime:0.001591s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 5872 [ RunTime:0.001577s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 3722 [ RunTime:0.001616s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 3315 [ RunTime:0.001597s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 3077 [ RunTime:0.001563s ]
[ SQL ] SELECT * FROM `user` WHERE `id` = 651 LIMIT 1 [ RunTime:0.000181s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 351 LIMIT 1 [ RunTime:0.000213s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 351 LIMIT 1 [ RunTime:0.000138s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 466 LIMIT 1 [ RunTime:0.000154s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 466 LIMIT 1 [ RunTime:0.000123s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 458 LIMIT 1 [ RunTime:0.000114s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 458 LIMIT 1 [ RunTime:0.000122s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 209 LIMIT 1 [ RunTime:0.000118s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 209 LIMIT 1 [ RunTime:0.000122s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 372 LIMIT 1 [ RunTime:0.000119s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 372 LIMIT 1 [ RunTime:0.000119s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 521 LIMIT 1 [ RunTime:0.000159s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 521 LIMIT 1 [ RunTime:0.000124s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 819 LIMIT 1 [ RunTime:0.000122s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 819 LIMIT 1 [ RunTime:0.000113s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 385 LIMIT 1 [ RunTime:0.000118s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 385 LIMIT 1 [ RunTime:0.000138s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 657 LIMIT 1 [ RunTime:0.000116s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 657 LIMIT 1 [ RunTime:0.000119s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 412 LIMIT 1 [ RunTime:0.000117s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 412 LIMIT 1 [ RunTime:0.000114s ]

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