to lead vs for lead

Some examples from the web:

• Captain, request permission to lead an away team.
• Whether Germany decides to lead or leave, either alternative would be better than creating an unsustainable two-tier Europe.
• You allowed a clearly disturbed individual to lead your activities.
• He's agreed to lead the investigation.
• The Senator's made a career criticizing the Agency he's about to lead.
• General Bandari has offered to lead the first attack.
• I wasn't qualified to lead that first team Through the stargate...
• Allowing the Ornarans to lead normal lives.
• Heartbroken, she returned to lead her people.
• The Arab countries have never allowed their Palestinian brothers to lead a dignified existence.
• Nonetheless, I was honored to lead the advance attack.
• I didn't know they were looking for somebody to lead this crazy attack.
• General Calrissian has volunteered to lead the fighter attack.
• Alex simply lacks the wisdom and experience to lead the Kinaho tribe in these complicated times.
• I never am chosen to lead the Unsullied.
• These conditions apply to lead banks running the books.
• Those keys have to lead somewhere.
• Jax was because I didn't think he was ready to lead.
• You are no longer fit to lead us.
• Really? You're going to lead me somewhere.

Some examples from the web:

• The impurity limits for lead and bismuth in any aluminium alloy shall not exceed 0,003 per cent.
• Carry out determinations for lead and/or cadmium under appropriate conditions.
• The belt tested positive for lead.
• In particular, a lower limit value should be set for lead.
• ERA also recommended that a temporary exemption for lead in solders should be re-considered nearer to the time that the RoHS Directive is amended.
• Sodium rhodizonate test was positive for lead.
• You treated with chelation for lead.
• Which is why we're testing for lead.
• The new directive tightens the migration limit for lead used in certain materials in toys.
• Chelation for lead wouldn't have made them worse.
• This report will be used for the review of maximum levels for lead and cadmium in foods.
• Seaweed should therefore be exempted from the default maximum levels for lead and cadmium in fruit and vegetables (points 3.1.10 and 3.2.15).
• More occurrence data should be collected to decide about the need for specific more realistic maximum levels for lead and cadmium in seaweed.
• Maximum limit for lead needs to be lowered due to safety reasons, and the reference on heavy metals is too generic and not relevant any more.
• And I just did yet another hair and blood test for lead, and everything else he could have possibly been exposed to.
• The methods of analysis for lead and cadmium are now described in Commission Regulation (EC) No 333/2007 of 28 March 2007 (Annex C-3).
• The EESC is concerned that definitive standards have not yet been established for lead, nickel and their compounds.
• In order to protect public health, it is therefore appropriate to set maximum levels for lead, cadmium and mercury in food supplements.
• Article 6 of Council Directive 82/884/EEC of 3 December 1982 on a limit value for lead in the air (5).
• The default maximum levels for lead and cadmium in fruit and vegetables are not realistic for seaweed, which can naturally contain higher levels.