山水盆景制作yyi

山水盆景制作yyi 山水盆景制作 山水盆景是以观赏岩石为主的一类盆景。制作山水盆景，首先必须进行艺术构思，确定主 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 ，然后按照山石的天然气质，取其全部或局部适宜造型的石料，并以植物及必要配件进行人工雕琢，配置成假山。将奇峰异峦、高峡飞漾、百嶂千峰、洞幽奇景等自然景色，浓缩到浅盆中，盛在几案上，俨如一幅立体山水画，使人如临碧波绿水之前、名山大川之间，意趣盎然。 1、石料的选择 制作山水盆景的基本材料主要是山石。我国地大物博，山石的种类繁多，常用的山石约有三十多种，基本上可分为松质和硬质两大类。松质的吸水性好，容易加工雕琢造型;硬质的则质地坚硬而不吸水，不易加工。不管松质或硬质山石，制作山水盆景的石料必须具有天然纹理、色彩以及形态自然等特点。 (1)砂积石 砂积石呈灰褐色或土黄色，因产地不同，不但色泽有深浅之分，而且质地的松硬程度也有差别。一般来讲，砂质石质轻而松，可根据需要，随心所欲地雕出各种形态的峰、洞、岩以及纹理等，还因其吸水性好，栽种植物易于生长，因此，这种松质石是制作山水盆景最常用的石料之一。但这种石料也有缺点，日子久了容易风化。这种石多产于浙江、安徽、四川、河北、山东等地。 (2)芦管石(也称麦秆石) funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 芦管石同砂积石的质地、颜色及产地基本相同。芦管石有粗有细，有天然形成的管状小孔和奇峰异洞。选取该石时，应取其自然、完整的部分，稍为加工便可成型。但加工时要特别小心，否则芦管断裂便影响自然美。 (3)浮石 浮石是玄武岩的一种，由火山喷发的岩浆冷凝而成，颜色有灰、灰黄、灰白等色，质地疏松，内部有较均匀的小孔，能浮于水面，吸水性好，用小刀可随意雕刻出各种形态。此石产于东北的吉林长白山以及黑龙江等地。 (4)海母石(珊瑚石) 海母石是一种贝壳类的冲积化石，因多产于海水中，含有较多的盐份，需要用清水浸洗一段较长的时间，去其盐份，才可附植小草木。该石质地疏松，便于改造，吸水性也好。这种石多产于海滨。 (5)钟乳石 钟乳石多产于广东、广西等各地岩洞，多为白色或微黄色，经过长期自然岩溶而形成柱状、锥状等各种形状，质地较疏松，锯截较方便。}\([gdwh|)}.com.cn (6)英石(石灰岩石) 英石盛产于广东英德一带。据《韶州府志》描述:“英石如芙蓉乱削，乳窦交通，p54岩勾漏，无不奇巧玲珑”。其颜色以灰黑色为多，间有白色、浅绿色和带白纹理的杂色。有天然形成的正背石，背石较平funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 坦，正面纹理自然，富于变化。质地坚硬，不吸水，不易破碎，但加工较困难。在选择英石时，以峥嵘、多孔、嶙峋，天然形成的为最佳。 (7)灵壁石 灵壁石质地坚硬，叩之有金属声，有黑色、白色，其中也夹杂有黑、白、赭、绿等色，俗称五彩，多产于安徽省的灵壁县。 (8)蜡石 蜡石无整体的岩层，多以独石存于山中。在我国南方各式各地高温多湿的山坑里，经常被水冲击，形成各种形态，质地坚硬，不能加工造型，只能以独石摆设。色有深黄、浅黄、白等。全石以无损坏、无杂质、表面滑净而有光泽及以窦穴奇形怪状的为珍品。 (9)斧劈石 斧劈石质硬而脆，颜色有多种，有深灰、浅灰、灰黑色和土黄色等。这种石具有丝状或片状的纹理。顺其纹理，略施斧凿或锯截，加工整形，可表现悬崖峭壁或高耸入云、雄伟挺拔的山峰。此石产于江苏一带。 (10)木化石 木化石即古代树木的化石，质地坚硬，加工较困难。颜色有黄褐色和深灰色。它是制作石山盆景的良好石料。 除上述常用的石料外，还有其他岩石，如产于广东花县的菊花石、芙蓉石，肇庆的端石和白星岩石，浙江的松皮石、石笋，四川的龟纹石、鸡骨石等等，也可作山水盆景的材料。 2、石料的加工 (1)工具 funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon ?锤子。平口锤(如斧头状)，适合加工松质石料;尖头锤(即一端尖，一端平口)，用以凿洞和雕琢石纹;平头锤，于于打凿子。这三种锤子应根据自己的需要分别特制大、中、小规格，以备用。 ?凿子。用以加工洞、穴、石纹。凿子必须是钢质的，长短、大小应根据需要而定，可多备几套不同规格的凿子。 ?钢锯。用钳工使用的弓锯即可，但锯齿要粗些。钢锯用于锯截疏松的石料和在石料上锯出纵、横石纹。 ?刻刀。有平口、圆口、斜口等形状，要备有各种规格的刻刀。刻刀用于松石的精雕细刻。 ?筛子。以金属制的最耐用，用以筛泥、砂、肥料等。 ?小铲。主要用来拌和水泥以及配石时铲水泥拼接山石。 ?刷子。水泥胶接山石前，必须用刷子将交接口刷净，胶接后，把在外围的水泥轻轻刷去。 (2)材料 ?水泥。标号越高越好。松质和硬质石料都可以用水泥拼接，但拼接白石料要用白水泥。 ?黄沙。用来拌和水泥，如用白水泥时，则要用白石米打碎代替黄沙。 ?颜料。为了使拼接口的色泽与拼接的石料相似，使拼石后，不留痕迹，多用墨法或色粉与水泥调拌。 (3) 方法 快递客服问题件处理详细方法山木方法pdf计算方法pdf华与华方法下载八字理论方法下载 funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 选取了合适的石料后，必须进行加工。加工要求做到自然而无人工的痕迹，雕琢不能过于呆板，而要生动流畅，要简洁有韵而不能繁杂失度。具体加工的方法有锯截、雕琢、胶接和衬石四种。 ?锯截法。动手前，对每一块石，首先要反复认真研究，按照一定的构思，进行去粗取精，截取适合造型部分作主体。剩下的部分因出自同一块石料，色泽、纹理、质地等方面都相近，可进行必要雕琢造型后作衬石用。不管是松质、硬质石，底部必须要锯平，使其放置平稳。对硬质石料则需要用金钢钻和专门设备才能截取，但在锯截石料时，对质地疏松的要特别小心，要用海绵或厚布垫着，也不要用力过猛，以免造成破碎或损坏石身及边角。 ?雕琢法。“玉不琢，不成器”。一般的石料自然形成完美的形态甚少，必须经过艺术加工。在加工雕凿时，对整块石头要全面审视，再三斟酌，以确定观赏面。确定观赏面后，把底部截平，然后根据石头的自然纹理，观察哪些部位适宜凿洞穴、峰峦、峡谷、岗岭、斜坡、悬崖、峭壁等，做到心中有数。在雕凿时还要掌握松石和硬石的质地，再运用不同的工具，因势利导地施行雕凿。近峰纹理线条要细致，远峰线条要粗犷。 这里介绍几种表现山石、峰峦的各种脉络、纹理的p57法:状如叶脉的荷叶皱宜表现花岗岩的山岳轮廊;乱麻一样的披麻皱宜表现土山的风貌;修直挺拔的斧劈宜表现峭壁悬崖高耸入云的气势;横纹曲折的折带皱宜表现石山的独特气质。 funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 石料经过雕琢、剔刻，各种不同的纹理形成了重岩复岭、嵚崟相连、深溪洞壑、峥嵘涧道等自然形态，使山水盆景更符合山峦的自然面貌。 ?胶接法。石料经过加工，局部仍有某些缺陷，可选用类似或相同的石料来胶接，以弥补不足。但胶接的所有石料，首先必须在石的质地、纹理、颜色、气势上大体一致，并用水洗净，这是拼接山石时应特别注意的问题。其次，硬石不吸水可随意胶合;松石需要吸水，在胶合时必须留出吸水线路，防止中间隔绝水分，造成石的上半部分断水，植物不易生长。 通常用的胶合材料是用水泥掺少量与石色相仿的颜料调配而成的。这样胶合后，就不会露出痕迹。也有的在水泥胶接缝上，涂上原来石粉的粉末，效果更理想。 3、石山的布局 山水盆景是运用移天缩地、以小见大的艺术手法，根据“一峰则太华千寻，一勺则江湖万里”的原则来造型和布局的。山水盆景以山为主，成功的石山必须是既具形态美和雄伟的山势，又有皱、瘦、透、漏之妙。“皱”就是要求石上表面有纹理，皱褶得有规律，不宜平滑;“瘦”就是要求石块稍长，顶端较宽有棱角，不宜臃肿;“透”就是指石块里面有大小孔道，互相沟通;“漏”是指石料要有孔隙，能够通气排水。我们在选择石料制作盆景时，主要是要根据石的特点来确定主题。如修直挺拔、呈悬崖峭壁的，可用来制作险峰;呈扁长形状的，可用来表现连绵不断的山峦;皱、瘦、透、漏皆备的，不但可作云峰、洲岛、土山，funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 还可作独石欣赏。如何充分利用石的自然形态进行布局、组拼安排，有下面三种方法可供参考。 ?独石。独石俗称孤峰，在盆内的左边或右边安置一块较大的石峰，另一侧放置一两块小石作岛屿，这样大山、小岛大小悬殊，各在其位，形成一峰异起于辽阔水面上的景致，此景蕴含深远，主题集中。这种石料以不用人工加工而自然形成的独石为佳。 ?子母石。在盆内设置两块一大一小的石峰，左右对峙，母石(主峰)突出，略偏于盆的任意一方，但不能立于盆的中央，这样母石在主位，子石作陪衬，子、母石高矮不一，大小各异，宾主分明。两石隔水相望，遥相呼应，既对立又统一，既简练又符合天然山水的真实性。 ?群石。这种石山状如“众如拱伏，主山始尊”。盆内山几座较大的石山组成，群石中的主山必须摆设在重要的位置上，其体积、高度要占绝对的优势，在拼接山石时，主景要突出，宾主有别。如制作“品字”形的石山群，首先选其中一块最高大的石块为主峰，布置在靠近盆中央稍后的位置，其余各石，围绕主峰，依次排列在左右较前的地方。这样山石层叠，穿插联络，丘壑森严，深厚自然，一幅层峦竞秀、清水涟漪的立体山水画犹置眼前。 盆中诸景既要富于变化，又不宜过于人工斧凿，要符合自然山水的气势。山有高低、远近，坡有陡缓、长短，峰有高峻、奇险，峦有圆浑、宏伟，崖有峭险，洞有大小，岸有曲折，树有疏密参差，草苔有秀丽疏落，山水盆景的一峰一峦，一山一水，一草一木都是举足轻重的，要全funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon 盘考虑，马虎不得。如果能“搜尽奇峰打草稿”，制作起山水盆景来，胸中有千山万壑，自然能够达到完美的境地。 4、配种植物与配置小景 山石盆景的石山制作完毕以后，还要着手种植一些草木，嵌上一些苔藓和配置一些人物，小鸟、亭台、房屋、小桥、小船等，用以点缀，使石山变幻无穷，生动活泼，富于诗情画意。 配种植物和配置小景，不但要符合山石和草木的比例，还要注意色彩的和谐，不能任意安放，而要有选择、有计划地分布。在山石的缝隙、阴暗面和山脚的地方栽植一些常绿的小草木、青苔、以及配置必要的人生、舟楫、桥梁、亭、榭等，以丰富山水盆景的内容，增添生活气息，使内容和形式达到调和统一。 5、山水盆景的保养 山水盆景因泥薄、水浅，植物幼嫩，在保养上要倍加小心。为了便于植物生长，平时应放在半阴阳、向南通风而又方便观赏的地方。夏季气温高，不宜久晒，必须遮挡烈日，以免附石的幼小植物旱死。 山水盆景不但要确保盆中不能断水，而且要经常换水，保持水的清洁;硬石盆景还要在山石上经常淋水，使山上的植物不缺水，以保持青苔和草木的青翠。如植物生长旺盛，同样要进行修剪、整容。 funnel, add water to the 20mL. Drawing on 0, 0.10, 0.20, 0.30., 0.40, 0.50mL lead standard solution (0, 1, 2, 3, 4, 5 µ g of lead), separate 125mL in a separatory funnel, plus 1mL nitrate (15.9 per cent) to 20mL. In the sample digest solution, reagent blank solution and lead plus 2mL in standard solution of ammonium citrate (20g/L), 1mL hydroxylamine hydrochloride solution (200g/L) And 2 drops of phenol red indicator solution, ammonia (1+1) to the red, plus 2mL potassium ferricyanide solution (100g/L), and mix. Plus 5.0mL II-dithizone with fluid, violent shaking 1min, static after stratification, chloroform layer through cotton wool filters into the 1cm in the Cuvette, to adjust the zero point in trichloromethane 510nm wavelength absorbance measurement, minus zero tube after each point, draw standard curve or calculate a regression equation, sample compared with the curve.cV1-the total volume of the sample digest solution, mL; V2-sample digestion liquid for measuring volume, mL. Results statement: report parallel determination of the arithmetic mean of the two valid number. 24 allow relative difference ? 10%. Detection of arsenic in the sixth chapter of food (Advanced) 1 scope this standard specifies a method for the determination of total arsenic in food. This standard applies to the determination of total arsenic in food. The method detection limit: by hydride generation-atomic fluorescence spectrometry: 0.01mg/kg, linear in the range of 0ng/mL~200ng/mL silver salt method; 0.2mg/kg; arsenic spot method, 0.25mg/kg; borohydride reduction colorimetric method: 0.05mg/kg. First, 2 principles of food samples by hydride generation atomic fluorescence spectrophotometry after wet digestion or dry ashing after adding thiourea pre-reduction of pentavalent arsenic to trivalent arsenic and Adding boron hydride or potassium borohydride reduction of hydrogen arsenide, by loading the silica atoms of argon