Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs. Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.
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Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.
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Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.
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Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.

PH计正确使用与维护
酸度计简称PH计，由电极和电计两部分组成。使用中若能够合理维护电极、按要求配制标准缓冲液和正确操作电计,可大大减小pH示值误差，从而提高化学实验、医学检验数据的可靠性。

一、正确使用与保养电极
目前实验室使用的电极都是复合电极，其优点是使用方便，不受氧化性或还原性物质的影响，且平衡速度较快。使用时，将电极加液口上所套的橡胶套和下端的橡皮套全取下，以保持电极内氯化钾溶液的液压差。下面就把电极的使用与维护简单作一介绍：
⒈复合电极不用时，可充分浸泡3M氯化钾溶液中。切忌用洗涤液或其他吸水性试剂浸洗。
⒉使用前，检查玻璃电极前端的球泡。正常情况下，电极应该透明而无裂纹；球泡内要充满溶液，不能有气泡存在。
⒊测量浓度较大的溶液时，尽量缩短测量时间，用后仔细清洗，防止被测液粘附在电极上而污染电极。
⒋清洗电极后，不要用滤纸擦拭玻璃膜，而应用滤纸吸干, 避免损坏玻璃薄膜、防止交叉污染，影响测量精度。
⒌测量中注意电极的银—氯化银内参比电极应浸入到球泡内氯化物缓冲溶液中，避免电计显示部分出现数字乱跳现象。使用时，注意将电极轻轻甩几下。
⒍电极不能用于强酸、强碱或其他腐蚀性溶液。
⒎严禁在脱水性介质如无水乙醇、重铬酸钾等中使用。

二、标准缓冲液的配制及其保存
⒈pH标准物质应保存在干燥的地方，如混合磷酸盐pH标准物质在空气湿度较大时就会发生潮解,一旦出现潮解,pH标准物质即不可使用。
⒉配制pH标准溶液应使用二次蒸馏水或者是去离子水。如果是用于0.1级PH计测量，则可以用普通蒸馏水。
⒊配制pH标准溶液应使用较小的烧杯来稀释，以减少沾在烧杯壁上的pH标准液。存放pH标准物质的塑料袋或其它容器，除了应倒干净以外，还应用蒸馏水多次冲洗，然后将其倒入配制的pH标准溶液中，以保证配制的pH标准溶液准确无误。
⒋配制好的标准缓冲溶液一般可保存2—3个月，如发现有浑浊、发霉或沉淀等现象时，不能继续使用。
⒌碱性标准溶液应装在聚乙烯瓶中密闭保存。防止二氧化碳进入标准溶液后形成碳酸，降低其pH值。

三、PH计的正确校准
PH计因电计设计的不同而类型很多，其操作步骤各有不同，因而PH计的操作应严格按照其使用说明书正确进行。在具体操作中，校准是PH计使用操作中的一重要步骤。表1的数据是精度为0.01级、经过计量检定合格的PH计在未校准时与校准后的测量值，从中可以看出校准的重要性。
标准pH 校准前误差（pH） 校准后误差（pH）
13.000 00.0600 00.0000
12.000 00.0450 00.0005
11.000 00.0500 00.0010
10.000 00.0300 00.0000
9.000 00.0200 00.0005
8.000 00.010 00.0005
7.000 00.0015 00.0000
6.000 -00.0100 -00.0005
5.000 -00.0105 00.0005
4.000 00.0150 00.0000
3.000 -00.0300 00.0000
2.000 -00.0200 -00.0003
1.000 -00.0350 -00.0001

尽管PH计种类很多，但其校准方法均采用两点校准法，即选择两种标准缓冲液：一种是pH7标准缓冲液，第二种是pH9标准缓冲液或pH4标准缓冲液。先用pH7标准缓冲液对电计进行定位，再根据待测溶液的酸碱性选择第二种标准缓冲液。如果待测溶液呈酸性，则选用pH4标准缓冲液；如果待测溶液呈碱性，则选用pH9标准缓冲液。若是手动调节的PH计，应在两种标准缓冲液之间反复操作几次，直至不需再调节其零点和定位（斜率）旋钮，PH计即可准确显示两种标准缓冲液pH值。则校准过程结束。此后，在测量过程中零点和定位旋钮就不应再动。若是智能式PH计，则不需反复调节，因为其内部已贮存几种标准缓冲液的pH值可供选择、而且可以自动识别并自动校准。但要注意标准缓冲液选择及其配制的准确性。智能式0.01级PH计一般内存有三至五种标准缓冲液pH值，如科立龙公司的KL-016型PH计等。

其次，在校准前应特别注意待测溶液的温度。以便正确选择标准缓冲液,并调节电计面板上的温度补偿旋钮,使其与待测溶液的温度一致。不同的温度下，标准缓冲溶液的pH值是不一样的。如表2所示：

温度（℃） pH7 pH4 pH9.2
10 6.92 4.00 9.33
15 6.90 4.00 9.28
20 6.86 4.00 9.18
25 6.86 4.00 9.18
30 6.85 4.01 9.14
40 6.84 4.03 9.01
50 6.83 4.06 9.02
50 6.83 4.06 9.02

校准工作结束后，对使用频繁的PH计一般在48小时内仪器不需再次定标。如遇到下列情况之一，仪器则需要重新标定：
⑴溶液温度与定标温度有较大的差异时.
⑵电极在空气中暴露过久，如半小时以上时.
⑶定位或斜率调节器被误动；
⑷测量过酸（pH＜2）或过碱（pH＞12）的溶液后；
⑸换过电极后；
⑹当所测溶液的pH值不在两点定标时所选溶液的中间，且距7pH又较远时。
pH/ORP/离子活度测量仪
PHS-4C+pH/ORP/离子活度测量仪
实验室pH电极
实验室pH电极
在线pH电极
在线pH电极
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您是访问本站的第 1121662 位客人 Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.
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Recommended sites:To get more Metin2 Yang, players should think of two guardian dogs: Pooch and Tack are the second bosses in Citadell Ail. Actually, many teams consider themselves as very easy bosses who are able to earn as much Metin2 Yang as possible. Pooch can make normal melee attack, which can bring some Metin2 Yang. Tack does the same and he can teleport you away from him, so that he can make a little Metin2 Yang. The skill will disorient you. However, there is no damage that causes any suffering of losing Metin2 Yang. As they do not equip with devastating skills, to make more ame and he Metin2 Yang, your team can combat them without heals or buffs.